Dr. Allegra Nicole LeGrande

Dr. Allegra Nicole LeGrande

  • RSCH AST, ATMOSPHERIC CHEMISTRY & DYN
  • 212.678.5556
  • NASA GISS
  • 2880 Broadway
  • NEW YORK , NY 10025
  • Employer: NASA
  • Brief Bio

    I am interested in the hydrologic cycle, and in particular tracers of the hydrologic cycle such as water isotopologues. These tracers are useful for establishing the provenance and (rainout) history of air parcels. They are also useful as a tracer of past climates (ice cores, cave deposits, ocean sediment cores, etc.). I do experiments with a general circulation model (the kind used in predicting future climate change) to discover details about the hydrologic cycle in the past and present in hopes of improving our ability to understand this part of the climate in the future.

    Research Interests

    Water Isotopologues as Proxy Measures of Past Climate

    I use the NASA Goddard Institute for Space Studies general circulation model, ModelE2 that has been enabled with tracers of the hydrologic cycle, water isotopolgoues (HDO and H2O18). The inclusion of the tracers allows me to simulate past climates and constrain the performance of the model (via these tracers) against measured archives of past climate. These archives include ice cores, speleothems (cave deposits), foraminifera and ostracodes (ocean/lake sediment cores), tree cellulose, and corals. Testing the model in times in which it wasn't designed to perform allows us to measure its skill. This should improve our confidence in its future simulations -- also a time where climate will be beyond the modern range of climate observations.

    Here is my project to determine 3D water isotope fields for the ocean: http://data.giss.nasa.gov/o18data/

    Here are the coodinated experiments: https://pmip.lsce.ipsl.fr

    Impact of Volcanic Aerosols on Climate

    In long climate experiments, volcanic aerosols (principally sulfate) are currently treated in a very parameterized way such that every volcano in a general circulation model resembles the 1991 eruption of Mt. Pinatubo. I am working towards improving the implementation of volcanoes in long transient experiments using the earth system components (aerosol and chemistry, 'MATRIX' model) components of the NASA Goddard Institute for Space Studies general circulation model, ModelE.

    http://www.pages-igbp.org/ini/wg/ocean2k/161-initiatives/working-group/vics/1290-vics

    Coordinated experiments: http://volmip.org

    Water Isotopologues as Tracers of Provenance

    I use general circulation (NASA Goddard Institute for Space Studies, ModelE2) model experiments paired with satellite measurements (Tropospheric Emission Spectrometer on AURA) of water isotopologues in water vapor (strongly related to the concentration in precipitation) to determine the provenance (origination) of moisture in thd lower to mid troposphere. This process improves our understanding of the tropical hydrologic cycle.

    Ice Sheet Health

    Future sea level rise is highly dependent on contributions from the melting of glacial ice in Greenland and Antarctica. Our understanding of future contributions from these sources is limited, however, because the timescale through which ice sheet mass comes into balance with climate forcing could be decades to centuries, depending on the magnitude and rapidity of the forcing. I use both past climate simulations of ice sheet mass balance as well as modern simulations to assess the climate models ability to capture changes in ice sheet health, with a focus on surface mass balance.

    Current Projects

    Using TES to improve understanding of the Tropical Hydrologic Cycle

    I use the TES (tropospheric emission spectrometer on AURA) instrument's measurements of specific humidity and deuterated (HDO) water paired with the NASA Goddard Institute for Space Studies general circulation model, ModelE2 simulations to understand the tropical hydrologic cycle -- especially modes of variability including the Madden-Julian Oscillation and El Nino Southern Oscillation.

    Paleoclimate Model Intercomparison Project, Phase 3

    This project has target simulations for general circulation models of past climate where proxy archives have been compiled. These experiments include 21 000 years ago (last glacial maximum) and 6 000 years ago (mid-Holocene). Other projects include the last millennium (850 AD to present) and Eocene (55 million years ago).

    I have completed simulations with NASA Goddard Institute for Space Studies general circulation model, ModelE2-R for this project.

    Role of eruptive volcanic emissions on atmospheric composition and climate

    The representation of volcanic eruptions in climate models introduces some of the largest errors when evaluating historical simulations, partly due to the crude model parameterizations. Several crucial areas of representing volcanic eruptions are investigated here: 1) the processes of converting sulfur dioxide to sulfate aerosol, the resulting aerosol size distribution and its evolution with time, by simulating and evaluating against measurements of the most recent large volcanic eruption (Mt. Pinatubo in 1991); 2) the impacts of eruptions with different characteristics on climate; 3) the role of water vapor and halogen injection on atmospheric composition and climate, and role of the multiple small eruptions that occurred during the last 15 years in the Earth system. We will evaluate the role volcanic eruptions play in atmospheric composition and climate using two different global models which are both able to simulate aerosol microphysics: the NASA GISS-E2, which represents aerosol size in logarithmic modes, and WACCM/CARMA, which represents aerosol size in discrete bins. This will allow us to prognostically determine the impact of gaseous emissions on climate and atmospheric composition, coming from both large eruptions that penetrate the stratosphere, and smaller ones that inject material only in the troposphere. A wealth of remotely sensed data will be used to evaluate the models, help improve the model assumptions, and, ultimately, model skill.

    Sensitivity of Climate Variability to Anthropogenic and Natural Drivers during the Last Millennium

    To understand the degree and causes of climate variability during the last millennium.
    The interactions between forcings and intrinsic variability are complicated, and the proxy records of climate response are by definition indirect measures. An ensemble of millennial-length simulations with the Goddard Institute for Space Studies GCM (ModelE2-R) is proposed to identify regional and temporal climate “fingerprints” from potentially important forcing mechanisms. In addition, the model's Earth System components (chemistry, aerosols, water isotopes, and wetland methane emissions) will be included in time-slices of particular interest – such as the early medieval (MT, 1000-1200) or Maunder Minimum (MM, 1550-1750).

    Determining the Health and Details of the Last Disappearance of a Land Ice Sheet.

    Using the NASA Goddard Institute for Space Studies general circulation model, ModelE2-R, I simulated roughly millennial time slice experiments from 24 000 years ago to 6 000 years ago, covering the period during which the Laurentide Ice Sheet was at its maximum to its disappearance. At each step, appropriate boundary conditions are assigned (topography, greenhouse gas concentration, vegetation changes, orbital changes), and the surface energy mass balance above the Laurentide is assessed. These results are then used to drive an offline energy mass balance ice sheet model. This process allows us to determine in detail the harbingers of ice sheet demise. The goal of this project is to assess the future health of the Greenland Ice Sheet.

    Positions/Employment

    9/2009 - Present

    Physical Research Scientist

    NASA Goddard Institute for Space Studies, New York, NY
    9/2009 - Present

    Adjunct Assistant Research Scientist

    Columbia University (adjunct, unpaid), New York, NY
    9/2007 - 3/2009

    Postdoctoral Research Scientist

    Columbia University, New York, NY
    3/2009 - 9/2009

    Associate Research Scientist

    Columbia University, New York, NY

    Education

    PhD: Columbia University 2007 -- Earth Sciences (adv: Gavin Schmidt & Wallce Broecker)
    MSc: Columbia University 2005 -- Earth Sciences (adv: Gavin Schmidt & Wallce Broecker)
    MA:   Columbia University 2003 -- Earth Sciences (adv: Jean Lynch Stieglitz & Gavin Schmidt)
    BSc : Rice University 2001 -- Geophysics, Geology, Anthropology
              University of Leeds 1999 -- Study Abroad Geophysics
    Robert E. Lee High School, Midland, Texas

    Publications

    Refereed

    Wehner, M., J. Arnold, T. Knutson, K. Kunkel, and A. LeGrande. 2017. "Droughts, floods, and wildfires." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 231--256 [10.7930/J0CJ8BNN]

    Vose, R., D. Easterling, K. Kunkel, A. LeGrande, and M. Wehner. 2017. "Temperature changes in the United States." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 185--206 [10.7930/J0N29V45]

    Sweet, W., R. Horton, R. Kopp, A. LeGrande, and A. Romanou. 2017. "Sea level rise." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 333--363 [10.7930/J0VM49F2]

    Perlwitz, J., T. Knutson, J. Kossin, and A. LeGrande. 2017. "Large-scale circulation and climate variability." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 161--184 [10.7930/J0RV0KVQ]

    Kopp, R., K. Hayhoe, D. Easterling, et al. T. Hall, R. Horton, K. Kunkel, and A. LeGrande. 2017. "Potential surprises — compound extremes and tipping elements." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 411--429 [10.7930/J0GB227J]

    Hayhoe, K., J. Edmonds, R. Kopp, et al. A. LeGrande, B. Sanderson, M. Wehner, and D. Wuebbles. 2017. "Climate models, scenarios, and projections." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 133--160 [10.7930/J0WH2N54]

    Easterling, D., K. Kunkel, J. Arnold, et al. T. Knutson, A. LeGrande, L. Leung, R. Vose, D. Waliser, and M. Wehner. 2017. "Precipitation change in the United States." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 207-230 [10.7930/J0H993CC]

    Wuebbles, D., D. Easterling, K. Hayhoe, et al. T. Knutson, R. Kopp, J. Kossin, K. Kunkel, A. LeGrande, C. Mears, W. Sweet, P. Taylor, R. Vose, and M. Wehner. 2017. "Our globally changing climate." Climate Science Special Report: Fourth National Climate Assessment, Volume I, 35-72 [10.7930/J08S4N35]

    Lunt, D. J., M. Huber, E. Anagnostou, et al. M. L. Baatsen, R. Caballero, R. DeConto, H. A. Dijkstra, Y. Donnadieu, D. Evans, R. Feng, G. L. Foster, E. Gasson, A. S. von der Heydt, C. J. Hollis, G. N. Inglis, S. M. Jones, J. Kiehl, S. Kirtland Turner, R. L. Korty, R. Kozdon, S. Krishnan, J.-B. Ladant, P. Langebroek, C. H. Lear, A. N. LeGrande, K. Littler, P. Markwick, B. Otto-Bliesner, P. Pearson, C. J. Poulsen, U. Salzmann, C. Shields, K. Snell, M. Stärz, J. Super, C. Tabor, J. E. Tierney, G. J. Tourte, A. Tripati, G. R. Upchurch, B. S. Wade, S. L. Wing, A. M. Winguth, N. M. Wright, J. C. Zachos, and R. E. Zeebe. 2017. "The DeepMIP contribution to PMIP4: experimental design for model simulations of the EECO, PETM, and pre-PETM (version 1.0)." Geoscientific Model Development, 10 (2): 889-901 [10.5194/gmd-10-889-2017]

    Conroy, J. L., D. M. Thompson, K. M. Cobb, et al. D. Noone, S. Rea, and A. N. Legrande. 2017. "Spatiotemporal variability in the δ18O-salinity relationship of seawater across the tropical Pacific Ocean." Paleoceanography, 32 (5): 484-497 [10.1002/2016pa003073]

    Rao, M. P., B. I. Cook, E. R. Cook, et al. R. D. D'Arrigo, P. J. Krusic, K. J. Anchukaitis, A. N. Legrande, B. M. Buckley, N. K. Davi, C. Leland, and K. L. Griffin. 2017. "European and Mediterranean hydroclimate responses to tropical volcanic forcing over the last millennium." Geophysical Research Letters, 44 (10): 5104-5112 [10.1002/2017gl073057]

    Zambri, B., A. N. LeGrande, A. Robock, and J. Slawinska. 2017. "Northern Hemisphere winter warming and summer monsoon reduction after volcanic eruptions over the last millennium." Journal of Geophysical Research: Atmospheres, 122 (15): 7971-7989 [10.1002/2017jd026728]

    Jungclaus, J. H., E. Bard, M. Baroni, et al. P. Braconnot, J. Cao, L. P. Chini, T. Egorova, M. Evans, J. F. González-Rouco, H. Goosse, G. C. Hurtt, F. Joos, J. O. Kaplan, M. Khodri, K. Klein Goldewijk, N. Krivova, A. N. LeGrande, S. J. Lorenz, J. Luterbacher, W. Man, A. C. Maycock, M. Meinshausen, A. Moberg, R. Muscheler, C. Nehrbass-Ahles, B. I. Otto-Bliesner, S. J. Phipps, J. Pongratz, E. Rozanov, G. A. Schmidt, H. Schmidt, W. Schmutz, A. Schurer, A. I. Shapiro, M. Sigl, J. E. Smerdon, S. K. Solanki, C. Timmreck, M. Toohey, I. G. Usoskin, S. Wagner, C.-J. Wu, K. L. Yeo, D. Zanchettin, Q. Zhang, and E. Zorita. 2017. "The PMIP4 contribution to CMIP6 – Part 3: The last millennium, scientific objective, and experimental design for the PMIP4 <i>past1000</i> simulations." Geoscientific Model Development, 10 (11): 4005-4033 [10.5194/gmd-10-4005-2017]

    Kageyama, M., S. Albani, P. Braconnot, et al. S. P. Harrison, P. O. Hopcroft, R. F. Ivanovic, F. Lambert, O. Marti, W. R. Peltier, J.-Y. Peterschmitt, D. M. Roche, L. Tarasov, X. Zhang, E. C. Brady, A. M. Haywood, A. N. LeGrande, D. J. Lunt, N. M. Mahowald, U. Mikolajewicz, K. H. Nisancioglu, B. L. Otto-Bliesner, H. Renssen, R. A. Tomas, Q. Zhang, A. Abe-Ouchi, P. J. Bartlein, J. Cao, Q. Li, G. Lohmann, R. Ohgaito, X. Shi, E. Volodin, K. Yoshida, X. Zhang, and W. Zheng. 2017. "The PMIP4 contribution to CMIP6 – Part 4: Scientific objectives and experimental design of the PMIP4-CMIP6 Last Glacial Maximum experiments and PMIP4 sensitivity experiments." Geoscientific Model Development, 10 (11): 4035-4055 [10.5194/gmd-10-4035-2017]

    Otto-Bliesner, B. L., P. Braconnot, S. P. Harrison, et al. D. J. Lunt, A. Abe-Ouchi, S. Albani, P. J. Bartlein, E. Capron, A. E. Carlson, A. Dutton, H. Fischer, H. Goelzer, A. Govin, A. Haywood, F. Joos, A. N. LeGrande, W. H. Lipscomb, G. Lohmann, N. Mahowald, C. Nehrbass-Ahles, F. S. Pausata, J.-Y. Peterschmitt, S. J. Phipps, H. Renssen, and Q. Zhang. 2017. "The PMIP4 contribution to CMIP6 – Part 2: Two interglacials, scientific objective and experimental design for Holocene and Last Interglacial simulations." Geoscientific Model Development, 10 (11): 3979-4003 [10.5194/gmd-10-3979-2017]

    Carmichael, M. J., D. J. Lunt, M. Huber, et al. M. Heinemann, J. Kiehl, A. LeGrande, C. A. Loptson, C. D. Roberts, N. Sagoo, C. Shields, P. J. Valdes, A. Winguth, C. Winguth, and R. D. Pancost. 2016. "A model–model and data–model comparison for the early Eocene hydrological cycle." Clim. Past, 12 (2): 455-481 [10.5194/cp-12-455-2016]

    Hansen, J., M. Sato, P. Hearty, et al. R. Ruedy, M. Kelley, V. Masson-Delmotte, G. Russell, G. Tselioudis, J. Cao, E. Rignot, I. Velicogna, B. Tormey, B. Donovan, E. Kandiano, K. von Schuckmann, P. Kharecha, A. N. Legrande, M. Bauer, and K.-W. Lo. 2016. "Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming could be dangerous." Atmos. Chem. Phys., 16 (6): 3761-3812 [10.5194/acp-16-3761-2016]

    Colose, C. M., A. N. LeGrande, and M. Vuille. 2016. "The influence of volcanic eruptions on the climate of tropical South America during the last millennium in an isotope-enabled general circulation model." Clim. Past, 12 (4): 961-979 [10.5194/cp-12-961-2016]

    Colose, C. M., A. N. LeGrande, and M. Vuille. 2016. "Hemispherically asymmetric volcanic forcing of tropical hydroclimate and water isotopologue variability during the last millennium." Earth System Dynamics Discussions, 1-52 (In Press) [10.5194/esd-2016-19]

    Lunt, D. J., M. Huber, M. L. Baatsen, et al. R. Caballero, R. DeConto, Y. Donnadieu, D. Evans, R. Feng, G. Foster, E. Gasson, A. S. von der Heydt, C. J. Hollis, S. Kirtland Turner, R. L. Korty, R. Kozdon, S. Krishnan, J.-B. Ladant, P. Langebroek, C. H. Lear, A. N. LeGrande, K. Littler, P. Markwick, B. Otto-Bliesner, P. Pearson, C. Poulsen, U. Salzmann, C. Shields, K. Snell, M. Starz, J. Super, C. Tabour, J. Tierney, G. J. Tourte, G. R. Upchurch, B. Wade, S. L. Wing, A. M. Winguth, N. Wright, J. C. Zachos, and R. Zeebe. 2016. "DeepMIP: experimental design for model simulations of the EECO, PETM, and pre-PETM." Geoscientific Model Development Discussions, 1-16 (Submitted) [10.5194/gmd-2016-127]

    LeGrande, A. N., K. Tsigaridis, and S. E. Bauer. 2016. "Role of atmospheric chemistry in the climate impacts of stratospheric volcanic injections." Nature Geoscience, [10.1038/ngeo2771]

    Toohey, M., F. Ludlow, and A. LeGrande. 2016. "How Did Climate and Humans Respond to Past Volcanic Eruptions?" Eos, [10.1029/2016eo062599]

    Jungclaus, J. H., E. Bard, M. Baroni, et al. P. Braconnot, J. Cao, L. P. Chini, T. Egorova, M. Evans, J. F. González-Rouco, H. Goosse, G. C. Hurtt, F. Joos, J. O. Kaplan, M. Khodri, K. Klein Goldewijk, N. Krivova, A. N. LeGrande, S. J. Lorenz, J. Luterbacher, W. Man, M. Meinshausen, A. Moberg, C. Nehrbass-Ahles, B. I. Otto-Bliesner, S. J. Phipps, J. Pongratz, E. Rozanov, G. A. Schmidt, H. Schmidt, W. Schmutz, A. Schurer, A. I. Shapiro, M. Sigl, J. E. Smerdon, S. K. Solanki, C. Timmreck, M. Toohey, I. G. Usoskin, S. Wagner, C.-Y. Wu, K. L. Yeo, D. Zanchettin, Q. Zhang, and E. Zorita. 2016. "The PMIP4 contribution to CMIP6 &ndash; Part 3: the Last Millennium, Scientific Objective and Experimental Design for the PMIP4 <i>past1000</i> simulations." Geoscientific Model Development Discussions, 1-34 (Submitted) [10.5194/gmd-2016-278]

    Otto-Bliesner, B. L., P. Braconnot, S. P. Harrison, et al. D. J. Lunt, A. Abe-Ouchi, S. Albani, P. J. Bartlein, E. Capron, A. E. Carlson, A. Dutton, H. Fischer, H. Goelzer, A. Govin, A. Haywood, F. Joos, A. N. Legrande, W. H. Lipscomb, G. Lohmann, N. Mahowald, C. Nehrbass-Ahles, F. S. Pausata, J.-Y. Peterschmitt, S. Phipps, and H. Renssen. 2016. "The PMIP4 contribution to CMIP6 &ndash; Part 2: Two Interglacials, Scientific Objective and Experimental Design for Holocene and Last Interglacial Simulations." Geoscientific Model Development Discussions, 1-36 (Submitted) [10.5194/gmd-2016-279]

    Jasechko, S., A. Lechler, F. S. Pausata, et al. P. J. Fawcett, T. Gleeson, D. I. Cendon, J. Galewsky, A. N. LeGrande, C. Risi, Z. D. Sharp, J. M. Welker, M. Werner, and K. Yoshimura. 2015. "Late-glacial to late-Holocene shifts in global precipitation delta18O." Clim. Past, 11: 1375-1393 [doi:10.5194/cp-11-1375-2015]

    Lewis, S. C., and A. N. LeGrande. 2015. "Stability of ENSO and its tropical Pacific teleconnections over the Last Millennium." Clim. Past, 11: 1347-1360 [doi:10.5194/cp-11-1347-2015]

    Marvel, K., G. A. Schmidt, D. Shindell, et al. C. Bonfils, A. N. LeGrande, L. Nazarenko, and K. Tsigaridis. 2015. "Do responses to different anthropogenic forcings add linearly in climate models?" Environ. Res. Lett., 10 (10): 104010 [doi:10.1088/1748-9326/10/10/104010]

    Ullman, D. J., A. E. Carlson, F. S. Anslow, A. N. LeGrande, and J. M. Licciardi. 2015. "Laurentide ice-sheet instability during the last deglaciation." Nature Geosci., 8 (7): 534-537 [doi:10.1038/ngeo2463]

    Nazarenko, L., G. A. Schmidt, R. L. Miller, et al. N. L. Tausnev, M. Kelley, R. A. Ruedy, G. L. Russell, I. Aleinov, M. P. Bauer, S. E. Bauer, R. Bleck, V. M. Canuto, Y. Cheng, T. L. Clune, A. D. Del Genio, G. S. Faluvegi, J. E. Hansen, R. J. Healy, N. Y. Kiang, D. Koch, A. A. Lacis, A. N. LeGrande, J. Lerner, K.-W. Lo, S. Menon, V. Oinas, J. P. Perlwitz, M. J. Puma, D. H. Rind, A. Romanou, M. Sato, D. T. Shindell, S. Sun, K. Tsigaridis, N. Unger, A. Voulgarakis, M.-S. Yao, and J. Zhang. 2015. "Future climate change under RCP emission scenarios with GISS ModelE2." J. Adv. Model. Earth Syst., 7 (1): 244-267 [doi:10.1002/2014MS000403]

    Ullman, D. J., A. E. Carlson, A. N. LeGrande, et al. F. S. Anslow, A. K. Moore, M. Caffee, K. M. Syverson, and J. M. Licciardi. 2015. "Southern Laurentide ice-sheet retreat synchronous with rising boreal summer insolation." Geology, 43 (1): 23-26 [doi:10.1130/G36179.1]

    Field, R. D., D. Kim, A. N. LeGrande, et al. J. Worden, M. Kelley, and G. A. Schmidt. 2014. "Evaluating climate model performance in the tropics with retrievals of water isotopic composition from Aura TES." Geophys. Res. Lett., 41 (16): 6030-6036 [doi:10.1002/2014GL060572]

    Miller, R. L., G. A. Schmidt, L. Nazarenko, et al. N. L. Tausnev, S. E. Bauer, A. Del Genio, M. Kelley, K.-W. Lo, R. A. Ruedy, D. T. Shindell, I. Aleinov, M. P. Bauer, R. Bleck, V. M. Canuto, Y. Chen, Y. Cheng, T. L. Clune, G. S. Faluvegi, J. E. Hansen, R. J. Healy, N. Y. Kiang, D. Koch, A. A. Lacis, A. N. Legrande, J. Lerner, S. Menon, V. Oinas, C. Perez Garcia Pando, J. P. Perlwitz, M. J. Puma, D. Rind, A. Romanou, G. L. Russell, M. Sato, S. Sun, K. Tsigaridis, N. Unger, A. Voulgarakis, M.-S. Yao, and J. Zhang. 2014. "CMIP5 historical simulations (1850-2012) with GISS ModelE2." J. Adv. Model. Earth Syst., 6 (2): 441-477 [10.1002/2013MS000266]

    Lewis, S. C., A. N. LeGrande, G. A. Schmidt, and M. Kelley. 2014. "Comparison of forced ENSO-like hydrological expressions in simulations of the preindustrial and mid-Holocene." J. Geophys. Res. Atmos., 119 (12): 7064-7082 [10.1002/2013JD020961]

    Schmidt, G. A., M. Kelley, L. Nazarenko, et al. R. A. Ruedy, G. L. Russell, I. Aleinov, M. P. Bauer, S. E. Bauer, M. K. Bhat, R. Bleck, V. M. Canuto, Y. Chen, Y. Cheng, T. L. Clune, A. D. Del Genio, R. de Fainchtein, G. S. Faluvegi, J. E. Hansen, R. J. Healy, N. Y. Kiang, D. Koch, A. A. Lacis, A. N. LeGrande, J. Lerner, K.-W. Lo, E. E. Matthews, S. Menon, R. L. Miller, V. Oinas, A. O. Oloso, J. P. Perlwitz, M. J. Puma, W. M. Putman, D. H. Rind, A. Romanou, M. Sato, D. T. Shindell, S. Sun, R. A. Syed, N. L. Tausnev, K. Tsigaridis, N. Unger, A. Voulgarakis, M.-S. Yao, and J. Zhang. 2014. "Configuration and assessment of the GISS ModelE2 contributions to the CMIP5 archive." J. Adv. Model. Earth Syst., 6 (1): 141-184 [10.1002/2013MS000265]

    Ullman, D. J., A. N. LeGrande, A. E. Carlson, F. S. Anslow, and J. M. Licciardi. 2014. "Assessing the impact of Laurentide Ice Sheet topography on glacial climate." Climate of the Past, 10 (2): 487-507 [10.5194/cp-10-487-2014]

    Gasson, E., D. J. Lunt, R. DeConto, et al. A. Goldner, M. Heinemann, M. Huber, A. N. LeGrande, D. Pollard, N. Sagoo, M. Siddall, A. Winguth, and P. J. Valdes. 2014. "Uncertainties in the modelled CO2 threshold for Antarctic glaciation." Climate of the Past, 10 (2): 451-466 [10.5194/cp-10-451-2014]

    Schmidt, G. A., J. D. Annan, P. J. Bartlein, et al. B. I. Cook, E. Guilyardi, J. C. Hargreaves, S. P. Harrison, M. Kageyama, A. N. LeGrande, B. Konecky, S. Lovejoy, M. E. Mann, V. Masson-Delmotte, C. Risi, D. Thompson, A. Timmermann, L.-B. Tremblay, and P. Yiou. 2014. "Using palaeo-climate comparisons to constrain future projections in CMIP5." Clim. Past, 10 (1): 221-250 [10.5194/cp-10-221-2014]

    Porter, T. J., M. F. Pisaric, R. D. Field, et al. S. V. Kokelj, T. W. Edwards, P. deMontigny, R. Healy, and A. LeGrande. 2014. "Spring-summer temperatures since AD 1780 reconstructed from stable oxygen isotope ratios in white spruce tree-rings from the Mackenzie Delta, northwestern Canada." Clim Dyn, 42 (3-4): 771-785 [10.1007/s00382-013-1674-3]

    Carlson, A. E., L. Winsor, D. J. Ullman, et al. E. J. Brook, D. H. Rood, Y. Axford, A. N. LeGrande, F. S. Anslow, and G. Sinclair. 2014. "Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent." Geophys. Res. Lett., 41 (15): 5514-5521 [10.1002/2014GL060800]

    Lewis, S. C., A. N. LeGrande, M. Kelley, and G. A. Schmidt. 2013. "Modeling insights into deuterium excess as an indicator of water vapor source conditions." J. Geophys. Res. Atmos., 118 (2): 243-262 [10.1029/2012JD017804]

    Morrill, C., A. N. LeGrande, H. Renssen, P. Bakker, and B. L. Otto-Bliesner. 2013. "Model sensitivity to North Atlantic freshwater forcing at 8.2 ka." Climate of the Past, 9 (2): 955-968 [10.5194/cp-9-955-2013]

    Lunt, D. J., T. Dunkley Jones, M. Heinemann, et al. M. Huber, A. LeGrande, A. Winguth, C. Loptson, J. Marotzke, J. Tindall, P. Valdes, and C. Winguth. 2012. "A model–data comparison for a multi-model ensemble of early Eocene atmosphere–ocean simulations: EoMIP." Climate of the Past, 8 (5): 1717-1736 [10.5194/cp-8-1717-2012]

    Field, R. D., C. Risi, G. A. Schmidt, et al. J. Worden, A. Voulgarakis, A. N. LeGrande, A. H. Sobel, and R. J. Healy. 2012. "A Tropospheric Emission Spectrometer HDO/H₂O retrieval simulator for climate models." Atmos. Chem. Phys., 12 (21): 10485-10504 [10.5194/acp-12-10485-2012]

    Tierney, J. E., D. W. Oppo, A. N. LeGrande, et al. Y. Huang, Y. Rosenthal, and B. K. Linsley. 2012. "The influence of Indian Ocean atmospheric circulation on Warm Pool hydroclimate during the Holocene epoch." J Geophys Res, 117 (D19): D19108 [10.1029/2012JD018060]

    Hoffman, J. S., A. E. Carlson, K. Winsor, et al. G. P. Klinkhammer, A. N. LeGrande, J. T. Andrews, and J. C. Strasser. 2012. "Linking the 8.2 ka event and its freshwater forcing in the Labrador Sea." Geophys Res Lett, 39 (18): L18703 [10.1029/2012GL053047]

    Tierney, J. E., S. C. Lewis, B. I. Cook, A. N. LeGrande, and G. A. Schmidt. 2011. "Model, proxy and isotopic perspectives on the East African Humid Period." Earth Planet Sci Lett, 307 (1-2): 103-112 [10.1016/j.epsl.2011.04.038]

    Roberts, C. D., A. N. LeGrande, and A. K. Tripati. 2011. "Sensitivity of seawater oxygen isotopes to climatic and tectonic boundary conditions in an early Paleogene simulation with GISS ModelE-R." Paleoceanography, 26 (4): PA4203 [10.1029/2010PA002025]

    Legrande, A. N., and G. A. Schmidt. 2011. "Water isotopologues as a quantitative paleosalinity proxy." Paleoceanography, 26 (3): PA3225 [10.1029/2010PA002043]

    Lewis, S. C., M. K. Gagan, L. K. Ayliffe, et al. J. Zhao, W. S. Hantoro, P. C. Treble, J. C. Hellstrom, A. N. Legrande, M. Kelley, G. A. Schmidt, and B. W. Suwargadi. 2011. "High-resolution stalagmite reconstructions of Australian–Indonesian monsoon rainfall variability during Heinrich stadial 3 and Greenland interstadial 4." Earth and Planetary Science Letters, 303 (1-2): 133-142 [10.1016/j.epsl.2010.12.048]

    D'Arrigo, R. D., R. Seager, J. E. Smerdon, A. N. Legrande, and E. R. Cook. 2011. "The anomalous winter of 1783-1784: Was the Laki eruption or an analog of the 2009-2010 winter to blame?" Geophysical Research Letters, 38 (5): L05706 [10.1029/2011GL046696]

    Lee, J., J. Worden, D. Noone, et al. K. Bowman, A. Eldering, A. N. Legrande, J. L. Li, G. A. Schmidt, and S. Sodemann. 2011. "Relating tropical ocean clouds to moist processes using water vapor isotope measurements." Atmos. Chem. Phys., 11 (2): 741-752 [10.5194/acp-11-741-2011]

    Lewis, S. C., A. N. LeGrande, M. Kelley, and G. A. Schmidt. 2010. "Water vapour source impacts on oxygen isotope variability in tropical precipitation during Heinrich events." Climate of the Past, 6 (3): 325-343 [10.5194/cp-6-325-2010]

    Mann, M. E., G. A. Schmidt, S. K. Miller, and A. N. LeGrande. 2009. "Potential biases in inferring Holocene temperature trends from long-term borehole information." Geophysical Research Letters, 36 (5): L05708 [10.1029/2008GL036354]

    LeGrande, A. N., and G. A. Schmidt. 2009. "Sources of Holocene variability of oxygen isotopes in paleoclimate archives." Climate of the Past, 5 (3): 441-455 [10.5194/cp-5-441-2009]

    Robert, C. D., A. N. Legrande, and A. K. Tripati. 2009. "Climate sensitivity to Arctic seaway restriction during the early Paleogene." Earth Planet Sci Lett, 286 (3-4): 576-585 [10.1016/j.epsl.2009.07.026]

    Carlson, A. E., F. S. Anslow, E. A. Obbink, et al. A. N. Legrande, D. J. Ullman, and J. M. Licciardi. 2009. "Surface-melt driven Laurentide Ice Sheet retreat during the early Holocene." Geophys Res Lett, 36 (24): L24502 [10.1029/2009GL040948]

    Muller, J., M. Kylander, R. A. Weust, et al. D. Weiss, A. Martinez-Cortizas, A. N. Legrande, T. Jennerjahn, H. Behling, W. T. Anderson, and G. Jacobson. 2008. "Possible evidence for wet Heinrich phases in tropical NE Australia: the Lynch's Crater deposit." Quaternary Science Reviews, 27 (5-6): 468-475 [10.1016/j.quascirev.2007.11.006]

    LeGrande, A. N., and G. A. Schmidt. 2008. "Ensemble, water isotope-enabled, coupled general circulation modeling insights into the 8.2 ka event." Paleoceanography, 23 (3): PA3207 [10.1029/2008PA001610]

    Carlson, A. E., D. W. Oppo, R. E. Came, et al. A. N. Legrande, L. D. Keigwin, and W. B. Curry. 2008. "Subtropical Atlantic salinity variability and Atlantic meridional circulation during the last deglaciation." Geology, 36 (12): 991-994 [10.1130/G25080A.1]

    Carlson, A. E., A. N. Legrande, D. W. Oppo, et al. R. E. Came, G. A. Schmidt, F. S. Anslow, J. M. Licciardi, and E. A. Obbink. 2008. "Rapid early Holocene deglaciation of the Laurentide ice sheet." Nature Geosci, 1 (9): 620-624 [10.1038/ngeo285]

    Schmidt, G. A., A. N. Legrande, and G. Hoffmann. 2007. "Water isotope expressions of intrinsic and forced variability in a coupled ocean-atmosphere model." J. Geophys. Res., 112 (D10): D10103 [10.1029/2006JD007781]

    Oppo, D. W., G. A. Schmidt, and A. N. Legrande. 2007. "Seawater isotope constraints on tropical hydrology during the Holocene." Geophys Res Lett, 34 (13): L13701 [10.1029/2007GL030017]

    LeGrande, A. N., and J. Lynch-Stieglitz. 2007. "Surface currents in the western North Atlantic during the Last Glacial Maximum." Geochemistry, Geophysics, Geosystems, 8 (1): Q01N09 [10.1029/2006GC001371]

    Masson-Delmotte, V., M. Kageyama, P. Braconnot, et al. S. Charbit, G. Krinner, C. Ritz, E. Guilyardi, J. Jouzel, A. Abe-Ouchi, M. Crucifix, R. M. Gladstone, C. D. Hewitt, A. Kitoh, A. N. LeGrande, O. Marti, U. Merkel, T. Motoi, R. Ohgaito, B. Otto-Bliesner, W. R. Peltier, I. Ross, P. J. Valdes, G. Vettoretti, S. L. Weber, F. Wolk, and Y. Yu. 2006. "Past and future polar amplification of climate change: climate model intercomparisons and ice-core constraints." Clim Dyn, 26 (5): 513-529 [10.1007/s00382-005-0081-9]

    LeGrande, A. N., G. A. Schmidt, D. T. Shindell, et al. C. V. Field, R. L. Miller, D. M. Koch, G. Faluvegi, and G. Hoffmann. 2006. "Consistent simulations of multiple proxy responses to an abrupt climate change event." Proceedings of the National Academy of Sciences, 103 (4): 837-842 [10.1073/pnas.0510095103]

    LeGrande, A. N., and G. A. Schmidt. 2006. "Global gridded data set of the oxygen isotopic composition in seawater." Geophys Res Lett, 33 (12): L12604 [10.1029/2006GL026011]

    Gladstone, R. M., I. Ross, P. J. Valdes, et al. A. Abe-Ouchi, P. Braconnot, S. Brewer, M. Kageyama, A. Kitoh, A. LeGrande, O. Marti, R. Ohgaito, B. Otto-Bliesner, W. R. Peltier, and G. Vettoretti. 2005. "Mid-Holocene NAO: A PMIP2 model intercomparison." Geophysical Research Letters, 32 (16): L16707 [10.1029/2005GL023596]

    LeGrande, A. N., J. Lynch-Stieglitz, and E. C. Farmer. 2004. "Oxygen isotopic composition of Globorotalia truncatulinoides as a proxy for intermediate depth density." Paleoceanography, 19 (4): PA4025 [10.1029/2004PA001045]

    Non-Refereed

    Pausata, F. S., A. N. LeGrande, and W. Roberts. 2016. "How Will Sea Ice Loss Affect the Greenland Ice Sheet?" Eos 97 (9): 10 [10.1029/2016eo047961]

    LeGrande, A. N. 2015. "Volcanoes and Climate." PAGES -- Past Global Changes 23 (2): 41-84 [Full Text (Link)]

    Schmidt, G. A., and A. N. Legrande. 2005. "The Goldilocks abrupt climate change event." Quaternary Science Reviews 24 (10-11): 1109-1110 [10.1016/j.quascirev.2005.01.015]

    Grants

    08/01/2008 - 12/01/2011 Co-PI: NSF-ATM 07-53660 “Collaborative Research: A New Method for Understanding Mechanisms of Ice Sheet Demise” Co-PI: A.E. Carlson, NSF-Atmospheres

    08/01/2009 PI NSF-ADVANCE Workshop Award: “Polar Amplification of Greenhouse Climates.”, NSF-Advance

    08/01/2008 - 07/31/2014 PI: NOAA C2D2 NA10OAR4310126 “Sensitivity of Climate Variability to Anthropogenic and Natural Drivers during the Last Millennium”, NOAA-C2D2

    08/01/2010 Co-PI: NSF P2C2 NSF-AGS-1003690 “Collaborative Research: Multi-scale analysis of Stable Isotope-climate relationships in tropical proxy records” PI: M. Vuille, NSF-P2C2

    10/31/2013 Co-PI: Climate Center Committee has agreed to fund your proposal entitled An LDEO/GISS Workshop: Improving the understanding of the impact of volcanic events. coI: R. D’Arrigo, Columbia University

    11/01/2014 - 10/31/2017 PI: NNH13ZDA001N-NEWS Satellite and model constraints on water cycling responses to MJO and ENSO using water isotopes: Renewal , NASA-NEWS

    10/01/2015 - 09/30/2016 SMD, NASA

    What should NASA do in case of a major volcanic eruption?, co-PI P. Colarco (GSFC)

    ; Co- PI
    01/01/2016 - 07/31/2016 PAGES, Past Global Changes

    Volcanic Impacts on Climate and Society, Inaugural Working Group meeting

    ; PI
    07/15/2017 - 07/14/2021 16-MAP16-0137:Modeling, Analysis, and Prediction, NASA, NASA NRA #: NNH16ZDA001N-MAP

    Understanding and quantifying the links between ice sheet and glacial albedo, surface mass balance and atmospheric fluxes through improved NASA GISS-E2 simulations

    ; Co-I; PI-Marco Tedesco

    Teaching Experience

    Mentor for Jesse Nussbaumer, NASA GISS Postdoc

    Mentor for Patrick Alexander, NASA GISS Postdoc

    Co-Supervised Chris Colose of University of Albany for his Ph.D. thesis with Mathias Vuille

    Humans and the Carbon Cycle -- guest lecturer, Spring 2013

    Co-Supervised Chris D. Roberts of Cambridge University for his Ph.D. thesis with Aradhna Tripati

    Co-Supervised Sophie C. Lewis of Australian National University for her Ph.D. thesis with Jeanette Lindsay and Michael Gagan

    Mentored David J. Ullman of the University of Wisconsin, Madison for his Ph.D. thesis with Anders C. Carlson
     

    Selected Public Outreach

    USGCRP CCSR, NCA4 2016 - Present
    https://science2017.globalchange.gov

    Dr. LeGrande worked on the USGCRP Climate Science Special Report (CSSR), which will be used in the Fourth National Climate Assessment.

    EOA 2016 2014 - Present
    http://www.globalchange.gov/about/highlights/2016-Evaluating-US-Earth-Observations

    Dr. LeGrande worked under NASA (Anne Thompson) and DoE (Dorothy Koch) to develop the Earth Observational Assessment (EOA) 2016 Paleoclimate section with Eugene Wahl and Thomas Cronin.

    Climate Change Research Initiative 2014 - Present
    http://www.giss.nasa.gov/edu/ccri/

    Climate Change Research Initiative

    The NASA GISS Climate Change Research Initiative — CCRI — is a summer internship opportunity for high school and undergraduate students as well as a year-long STEM engagement opportunity for educators and graduate students. Students and educators work directly with NASA scientists on NASA research projects associated with the science related to climate change.

    LDEO-Columbia University Summer Internship 2011 - Present
    http://www.ldeo.columbia.edu/education/summer-internship

    Summer Intern Programs for Undergraduates

    The Lamont Summer Intern Program for undergraduates from U.S. colleges and universities provides a summer research experience in Earth and ocean sciences. The program features a hands-on research project under the supervision of a Columbia-affiliated scientist, as well as special lectures, workshops and fieldtrips. Visit the program page for details and access to the online application.

    Intrepid GOALS mentor 2015 - Present
    http://www.intrepidmuseum.org/GOALSforGirls.aspx

    The GOALS (Greater Opportunities Advancing Leadership and Science) for Girls program aims to increase the presence of women in STEM (science, technology, engineering and math) fields. We do this by providing female students with a positive influence, increasing their confidence and improving their attitudes toward STEM topics, equipping them with key skills and resources needed for success in STEM fields, and encouraging the pursuit of STEM-centric careers and studies.

    Year-round programs, which include internships, weekend forums and the GOALS for Girls Summer Intensive program, offer female students, families, and their schools various pathways to connect to the Intrepid Museum and STEM opportunities.

    Brief Bio

    I am interested in the hydrologic cycle, and in particular tracers of the hydrologic cycle such as water isotopologues. These tracers are useful for establishing the provenance and (rainout) history of air parcels. They are also useful as a tracer of past climates (ice cores, cave deposits, ocean sediment cores, etc.). I do experiments with a general circulation model (the kind used in predicting future climate change) to discover details about the hydrologic cycle in the past and present in hopes of improving our ability to understand this part of the climate in the future.

    Publications

    Refereed

    Wehner, M., J. Arnold, T. Knutson, K. Kunkel, and A. LeGrande. 2017. "Droughts, floods, and wildfires." Climate Science Special Report: Fourth National Climate Assessment, Volume I 231--256 [10.7930/J0CJ8BNN]

    Vose, R., D. Easterling, K. Kunkel, A. LeGrande, and M. Wehner. 2017. "Temperature changes in the United States." Climate Science Special Report: Fourth National Climate Assessment, Volume I 185--206 [10.7930/J0N29V45]

    Sweet, W., R. Horton, R. Kopp, A. LeGrande, and A. Romanou. 2017. "Sea level rise." Climate Science Special Report: Fourth National Climate Assessment, Volume I 333--363 [10.7930/J0VM49F2]

    Perlwitz, J., T. Knutson, J. Kossin, and A. LeGrande. 2017. "Large-scale circulation and climate variability." Climate Science Special Report: Fourth National Climate Assessment, Volume I 161--184 [10.7930/J0RV0KVQ]

    Kopp, R., K. Hayhoe, D. Easterling, et al. T. Hall, R. Horton, K. Kunkel, and A. LeGrande. 2017. "Potential surprises — compound extremes and tipping elements." Climate Science Special Report: Fourth National Climate Assessment, Volume I 411--429 [10.7930/J0GB227J]

    Hayhoe, K., J. Edmonds, R. Kopp, et al. A. LeGrande, B. Sanderson, M. Wehner, and D. Wuebbles. 2017. "Climate models, scenarios, and projections." Climate Science Special Report: Fourth National Climate Assessment, Volume I 133--160 [10.7930/J0WH2N54]

    Easterling, D., K. Kunkel, J. Arnold, et al. T. Knutson, A. LeGrande, L. Leung, R. Vose, D. Waliser, and M. Wehner. 2017. "Precipitation change in the United States." Climate Science Special Report: Fourth National Climate Assessment, Volume I 207-230 [10.7930/J0H993CC]

    Wuebbles, D., D. Easterling, K. Hayhoe, et al. T. Knutson, R. Kopp, J. Kossin, K. Kunkel, A. LeGrande, C. Mears, W. Sweet, P. Taylor, R. Vose, and M. Wehner. 2017. "Our globally changing climate." Climate Science Special Report: Fourth National Climate Assessment, Volume I 35-72 [10.7930/J08S4N35]

    Lunt, D. J., M. Huber, E. Anagnostou, et al. M. L. Baatsen, R. Caballero, R. DeConto, H. A. Dijkstra, Y. Donnadieu, D. Evans, R. Feng, G. L. Foster, E. Gasson, A. S. von der Heydt, C. J. Hollis, G. N. Inglis, S. M. Jones, J. Kiehl, S. Kirtland Turner, R. L. Korty, R. Kozdon, S. Krishnan, J.-B. Ladant, P. Langebroek, C. H. Lear, A. N. LeGrande, K. Littler, P. Markwick, B. Otto-Bliesner, P. Pearson, C. J. Poulsen, U. Salzmann, C. Shields, K. Snell, M. Stärz, J. Super, C. Tabor, J. E. Tierney, G. J. Tourte, A. Tripati, G. R. Upchurch, B. S. Wade, S. L. Wing, A. M. Winguth, N. M. Wright, J. C. Zachos, and R. E. Zeebe. 2017. "The DeepMIP contribution to PMIP4: experimental design for model simulations of the EECO, PETM, and pre-PETM (version 1.0)." Geoscientific Model Development 10 (2): 889-901 [10.5194/gmd-10-889-2017]

    Conroy, J. L., D. M. Thompson, K. M. Cobb, et al. D. Noone, S. Rea, and A. N. Legrande. 2017. "Spatiotemporal variability in the δ18O-salinity relationship of seawater across the tropical Pacific Ocean." Paleoceanography 32 (5): 484-497 [10.1002/2016pa003073]

    Rao, M. P., B. I. Cook, E. R. Cook, et al. R. D. D'Arrigo, P. J. Krusic, K. J. Anchukaitis, A. N. Legrande, B. M. Buckley, N. K. Davi, C. Leland, and K. L. Griffin. 2017. "European and Mediterranean hydroclimate responses to tropical volcanic forcing over the last millennium." Geophysical Research Letters 44 (10): 5104-5112 [10.1002/2017gl073057]

    Zambri, B., A. N. LeGrande, A. Robock, and J. Slawinska. 2017. "Northern Hemisphere winter warming and summer monsoon reduction after volcanic eruptions over the last millennium." Journal of Geophysical Research: Atmospheres 122 (15): 7971-7989 [10.1002/2017jd026728]

    Jungclaus, J. H., E. Bard, M. Baroni, et al. P. Braconnot, J. Cao, L. P. Chini, T. Egorova, M. Evans, J. F. González-Rouco, H. Goosse, G. C. Hurtt, F. Joos, J. O. Kaplan, M. Khodri, K. Klein Goldewijk, N. Krivova, A. N. LeGrande, S. J. Lorenz, J. Luterbacher, W. Man, A. C. Maycock, M. Meinshausen, A. Moberg, R. Muscheler, C. Nehrbass-Ahles, B. I. Otto-Bliesner, S. J. Phipps, J. Pongratz, E. Rozanov, G. A. Schmidt, H. Schmidt, W. Schmutz, A. Schurer, A. I. Shapiro, M. Sigl, J. E. Smerdon, S. K. Solanki, C. Timmreck, M. Toohey, I. G. Usoskin, S. Wagner, C.-J. Wu, K. L. Yeo, D. Zanchettin, Q. Zhang, and E. Zorita. 2017. "The PMIP4 contribution to CMIP6 – Part 3: The last millennium, scientific objective, and experimental design for the PMIP4 <i>past1000</i> simulations." Geoscientific Model Development 10 (11): 4005-4033 [10.5194/gmd-10-4005-2017]

    Kageyama, M., S. Albani, P. Braconnot, et al. S. P. Harrison, P. O. Hopcroft, R. F. Ivanovic, F. Lambert, O. Marti, W. R. Peltier, J.-Y. Peterschmitt, D. M. Roche, L. Tarasov, X. Zhang, E. C. Brady, A. M. Haywood, A. N. LeGrande, D. J. Lunt, N. M. Mahowald, U. Mikolajewicz, K. H. Nisancioglu, B. L. Otto-Bliesner, H. Renssen, R. A. Tomas, Q. Zhang, A. Abe-Ouchi, P. J. Bartlein, J. Cao, Q. Li, G. Lohmann, R. Ohgaito, X. Shi, E. Volodin, K. Yoshida, X. Zhang, and W. Zheng. 2017. "The PMIP4 contribution to CMIP6 – Part 4: Scientific objectives and experimental design of the PMIP4-CMIP6 Last Glacial Maximum experiments and PMIP4 sensitivity experiments." Geoscientific Model Development 10 (11): 4035-4055 [10.5194/gmd-10-4035-2017]

    Otto-Bliesner, B. L., P. Braconnot, S. P. Harrison, et al. D. J. Lunt, A. Abe-Ouchi, S. Albani, P. J. Bartlein, E. Capron, A. E. Carlson, A. Dutton, H. Fischer, H. Goelzer, A. Govin, A. Haywood, F. Joos, A. N. LeGrande, W. H. Lipscomb, G. Lohmann, N. Mahowald, C. Nehrbass-Ahles, F. S. Pausata, J.-Y. Peterschmitt, S. J. Phipps, H. Renssen, and Q. Zhang. 2017. "The PMIP4 contribution to CMIP6 – Part 2: Two interglacials, scientific objective and experimental design for Holocene and Last Interglacial simulations." Geoscientific Model Development 10 (11): 3979-4003 [10.5194/gmd-10-3979-2017]

    Carmichael, M. J., D. J. Lunt, M. Huber, et al. M. Heinemann, J. Kiehl, A. LeGrande, C. A. Loptson, C. D. Roberts, N. Sagoo, C. Shields, P. J. Valdes, A. Winguth, C. Winguth, and R. D. Pancost. 2016. "A model–model and data–model comparison for the early Eocene hydrological cycle." Clim. Past 12 (2): 455-481 [10.5194/cp-12-455-2016]

    Hansen, J., M. Sato, P. Hearty, et al. R. Ruedy, M. Kelley, V. Masson-Delmotte, G. Russell, G. Tselioudis, J. Cao, E. Rignot, I. Velicogna, B. Tormey, B. Donovan, E. Kandiano, K. von Schuckmann, P. Kharecha, A. N. Legrande, M. Bauer, and K.-W. Lo. 2016. "Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming could be dangerous." Atmos. Chem. Phys. 16 (6): 3761-3812 [10.5194/acp-16-3761-2016]

    Colose, C. M., A. N. LeGrande, and M. Vuille. 2016. "The influence of volcanic eruptions on the climate of tropical South America during the last millennium in an isotope-enabled general circulation model." Clim. Past 12 (4): 961-979 [10.5194/cp-12-961-2016]

    Colose, C. M., A. N. LeGrande, and M. Vuille. 2016. "Hemispherically asymmetric volcanic forcing of tropical hydroclimate and water isotopologue variability during the last millennium." Earth System Dynamics Discussions (In Press) 1-52 [10.5194/esd-2016-19]

    Lunt, D. J., M. Huber, M. L. Baatsen, et al. R. Caballero, R. DeConto, Y. Donnadieu, D. Evans, R. Feng, G. Foster, E. Gasson, A. S. von der Heydt, C. J. Hollis, S. Kirtland Turner, R. L. Korty, R. Kozdon, S. Krishnan, J.-B. Ladant, P. Langebroek, C. H. Lear, A. N. LeGrande, K. Littler, P. Markwick, B. Otto-Bliesner, P. Pearson, C. Poulsen, U. Salzmann, C. Shields, K. Snell, M. Starz, J. Super, C. Tabour, J. Tierney, G. J. Tourte, G. R. Upchurch, B. Wade, S. L. Wing, A. M. Winguth, N. Wright, J. C. Zachos, and R. Zeebe. 2016. "DeepMIP: experimental design for model simulations of the EECO, PETM, and pre-PETM." Geoscientific Model Development Discussions (Submitted) 1-16 [10.5194/gmd-2016-127]

    LeGrande, A. N., K. Tsigaridis, and S. E. Bauer. 2016. "Role of atmospheric chemistry in the climate impacts of stratospheric volcanic injections." Nature Geoscience [10.1038/ngeo2771]

    Toohey, M., F. Ludlow, and A. LeGrande. 2016. "How Did Climate and Humans Respond to Past Volcanic Eruptions?" Eos [10.1029/2016eo062599]

    Jungclaus, J. H., E. Bard, M. Baroni, et al. P. Braconnot, J. Cao, L. P. Chini, T. Egorova, M. Evans, J. F. González-Rouco, H. Goosse, G. C. Hurtt, F. Joos, J. O. Kaplan, M. Khodri, K. Klein Goldewijk, N. Krivova, A. N. LeGrande, S. J. Lorenz, J. Luterbacher, W. Man, M. Meinshausen, A. Moberg, C. Nehrbass-Ahles, B. I. Otto-Bliesner, S. J. Phipps, J. Pongratz, E. Rozanov, G. A. Schmidt, H. Schmidt, W. Schmutz, A. Schurer, A. I. Shapiro, M. Sigl, J. E. Smerdon, S. K. Solanki, C. Timmreck, M. Toohey, I. G. Usoskin, S. Wagner, C.-Y. Wu, K. L. Yeo, D. Zanchettin, Q. Zhang, and E. Zorita. 2016. "The PMIP4 contribution to CMIP6 &ndash; Part 3: the Last Millennium, Scientific Objective and Experimental Design for the PMIP4 <i>past1000</i> simulations." Geoscientific Model Development Discussions (Submitted) 1-34 [10.5194/gmd-2016-278]

    Otto-Bliesner, B. L., P. Braconnot, S. P. Harrison, et al. D. J. Lunt, A. Abe-Ouchi, S. Albani, P. J. Bartlein, E. Capron, A. E. Carlson, A. Dutton, H. Fischer, H. Goelzer, A. Govin, A. Haywood, F. Joos, A. N. Legrande, W. H. Lipscomb, G. Lohmann, N. Mahowald, C. Nehrbass-Ahles, F. S. Pausata, J.-Y. Peterschmitt, S. Phipps, and H. Renssen. 2016. "The PMIP4 contribution to CMIP6 &ndash; Part 2: Two Interglacials, Scientific Objective and Experimental Design for Holocene and Last Interglacial Simulations." Geoscientific Model Development Discussions (Submitted) 1-36 [10.5194/gmd-2016-279]

    Jasechko, S., A. Lechler, F. S. Pausata, et al. P. J. Fawcett, T. Gleeson, D. I. Cendon, J. Galewsky, A. N. LeGrande, C. Risi, Z. D. Sharp, J. M. Welker, M. Werner, and K. Yoshimura. 2015. "Late-glacial to late-Holocene shifts in global precipitation delta18O." Clim. Past 11 1375-1393 [doi:10.5194/cp-11-1375-2015]

    Lewis, S. C., and A. N. LeGrande. 2015. "Stability of ENSO and its tropical Pacific teleconnections over the Last Millennium." Clim. Past 11 1347-1360 [doi:10.5194/cp-11-1347-2015]

    Marvel, K., G. A. Schmidt, D. Shindell, et al. C. Bonfils, A. N. LeGrande, L. Nazarenko, and K. Tsigaridis. 2015. "Do responses to different anthropogenic forcings add linearly in climate models?" Environ. Res. Lett. 10 (10): 104010 [doi:10.1088/1748-9326/10/10/104010]

    Ullman, D. J., A. E. Carlson, F. S. Anslow, A. N. LeGrande, and J. M. Licciardi. 2015. "Laurentide ice-sheet instability during the last deglaciation." Nature Geosci. 8 (7): 534-537 [doi:10.1038/ngeo2463]

    Nazarenko, L., G. A. Schmidt, R. L. Miller, et al. N. L. Tausnev, M. Kelley, R. A. Ruedy, G. L. Russell, I. Aleinov, M. P. Bauer, S. E. Bauer, R. Bleck, V. M. Canuto, Y. Cheng, T. L. Clune, A. D. Del Genio, G. S. Faluvegi, J. E. Hansen, R. J. Healy, N. Y. Kiang, D. Koch, A. A. Lacis, A. N. LeGrande, J. Lerner, K.-W. Lo, S. Menon, V. Oinas, J. P. Perlwitz, M. J. Puma, D. H. Rind, A. Romanou, M. Sato, D. T. Shindell, S. Sun, K. Tsigaridis, N. Unger, A. Voulgarakis, M.-S. Yao, and J. Zhang. 2015. "Future climate change under RCP emission scenarios with GISS ModelE2." J. Adv. Model. Earth Syst. 7 (1): 244-267 [doi:10.1002/2014MS000403]

    Ullman, D. J., A. E. Carlson, A. N. LeGrande, et al. F. S. Anslow, A. K. Moore, M. Caffee, K. M. Syverson, and J. M. Licciardi. 2015. "Southern Laurentide ice-sheet retreat synchronous with rising boreal summer insolation." Geology 43 (1): 23-26 [doi:10.1130/G36179.1]

    Field, R. D., D. Kim, A. N. LeGrande, et al. J. Worden, M. Kelley, and G. A. Schmidt. 2014. "Evaluating climate model performance in the tropics with retrievals of water isotopic composition from Aura TES." Geophys. Res. Lett. 41 (16): 6030-6036 [doi:10.1002/2014GL060572]

    Miller, R. L., G. A. Schmidt, L. Nazarenko, et al. N. L. Tausnev, S. E. Bauer, A. Del Genio, M. Kelley, K.-W. Lo, R. A. Ruedy, D. T. Shindell, I. Aleinov, M. P. Bauer, R. Bleck, V. M. Canuto, Y. Chen, Y. Cheng, T. L. Clune, G. S. Faluvegi, J. E. Hansen, R. J. Healy, N. Y. Kiang, D. Koch, A. A. Lacis, A. N. Legrande, J. Lerner, S. Menon, V. Oinas, C. Perez Garcia Pando, J. P. Perlwitz, M. J. Puma, D. Rind, A. Romanou, G. L. Russell, M. Sato, S. Sun, K. Tsigaridis, N. Unger, A. Voulgarakis, M.-S. Yao, and J. Zhang. 2014. "CMIP5 historical simulations (1850-2012) with GISS ModelE2." J. Adv. Model. Earth Syst. 6 (2): 441-477 [10.1002/2013MS000266]

    Lewis, S. C., A. N. LeGrande, G. A. Schmidt, and M. Kelley. 2014. "Comparison of forced ENSO-like hydrological expressions in simulations of the preindustrial and mid-Holocene." J. Geophys. Res. Atmos. 119 (12): 7064-7082 [10.1002/2013JD020961]

    Schmidt, G. A., M. Kelley, L. Nazarenko, et al. R. A. Ruedy, G. L. Russell, I. Aleinov, M. P. Bauer, S. E. Bauer, M. K. Bhat, R. Bleck, V. M. Canuto, Y. Chen, Y. Cheng, T. L. Clune, A. D. Del Genio, R. de Fainchtein, G. S. Faluvegi, J. E. Hansen, R. J. Healy, N. Y. Kiang, D. Koch, A. A. Lacis, A. N. LeGrande, J. Lerner, K.-W. Lo, E. E. Matthews, S. Menon, R. L. Miller, V. Oinas, A. O. Oloso, J. P. Perlwitz, M. J. Puma, W. M. Putman, D. H. Rind, A. Romanou, M. Sato, D. T. Shindell, S. Sun, R. A. Syed, N. L. Tausnev, K. Tsigaridis, N. Unger, A. Voulgarakis, M.-S. Yao, and J. Zhang. 2014. "Configuration and assessment of the GISS ModelE2 contributions to the CMIP5 archive." J. Adv. Model. Earth Syst. 6 (1): 141-184 [10.1002/2013MS000265]

    Ullman, D. J., A. N. LeGrande, A. E. Carlson, F. S. Anslow, and J. M. Licciardi. 2014. "Assessing the impact of Laurentide Ice Sheet topography on glacial climate." Climate of the Past 10 (2): 487-507 [10.5194/cp-10-487-2014]

    Gasson, E., D. J. Lunt, R. DeConto, et al. A. Goldner, M. Heinemann, M. Huber, A. N. LeGrande, D. Pollard, N. Sagoo, M. Siddall, A. Winguth, and P. J. Valdes. 2014. "Uncertainties in the modelled CO2 threshold for Antarctic glaciation." Climate of the Past 10 (2): 451-466 [10.5194/cp-10-451-2014]

    Schmidt, G. A., J. D. Annan, P. J. Bartlein, et al. B. I. Cook, E. Guilyardi, J. C. Hargreaves, S. P. Harrison, M. Kageyama, A. N. LeGrande, B. Konecky, S. Lovejoy, M. E. Mann, V. Masson-Delmotte, C. Risi, D. Thompson, A. Timmermann, L.-B. Tremblay, and P. Yiou. 2014. "Using palaeo-climate comparisons to constrain future projections in CMIP5." Clim. Past 10 (1): 221-250 [10.5194/cp-10-221-2014]

    Porter, T. J., M. F. Pisaric, R. D. Field, et al. S. V. Kokelj, T. W. Edwards, P. deMontigny, R. Healy, and A. LeGrande. 2014. "Spring-summer temperatures since AD 1780 reconstructed from stable oxygen isotope ratios in white spruce tree-rings from the Mackenzie Delta, northwestern Canada." Clim Dyn 42 (3-4): 771-785 [10.1007/s00382-013-1674-3]

    Carlson, A. E., L. Winsor, D. J. Ullman, et al. E. J. Brook, D. H. Rood, Y. Axford, A. N. LeGrande, F. S. Anslow, and G. Sinclair. 2014. "Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent." Geophys. Res. Lett. 41 (15): 5514-5521 [10.1002/2014GL060800]

    Lewis, S. C., A. N. LeGrande, M. Kelley, and G. A. Schmidt. 2013. "Modeling insights into deuterium excess as an indicator of water vapor source conditions." J. Geophys. Res. Atmos. 118 (2): 243-262 [10.1029/2012JD017804]

    Morrill, C., A. N. LeGrande, H. Renssen, P. Bakker, and B. L. Otto-Bliesner. 2013. "Model sensitivity to North Atlantic freshwater forcing at 8.2 ka." Climate of the Past 9 (2): 955-968 [10.5194/cp-9-955-2013]

    Lunt, D. J., T. Dunkley Jones, M. Heinemann, et al. M. Huber, A. LeGrande, A. Winguth, C. Loptson, J. Marotzke, J. Tindall, P. Valdes, and C. Winguth. 2012. "A model–data comparison for a multi-model ensemble of early Eocene atmosphere–ocean simulations: EoMIP." Climate of the Past 8 (5): 1717-1736 [10.5194/cp-8-1717-2012]

    Field, R. D., C. Risi, G. A. Schmidt, et al. J. Worden, A. Voulgarakis, A. N. LeGrande, A. H. Sobel, and R. J. Healy. 2012. "A Tropospheric Emission Spectrometer HDO/H₂O retrieval simulator for climate models." Atmos. Chem. Phys. 12 (21): 10485-10504 [10.5194/acp-12-10485-2012]

    Tierney, J. E., D. W. Oppo, A. N. LeGrande, et al. Y. Huang, Y. Rosenthal, and B. K. Linsley. 2012. "The influence of Indian Ocean atmospheric circulation on Warm Pool hydroclimate during the Holocene epoch." J Geophys Res 117 (D19): D19108 [10.1029/2012JD018060]

    Hoffman, J. S., A. E. Carlson, K. Winsor, et al. G. P. Klinkhammer, A. N. LeGrande, J. T. Andrews, and J. C. Strasser. 2012. "Linking the 8.2 ka event and its freshwater forcing in the Labrador Sea." Geophys Res Lett 39 (18): L18703 [10.1029/2012GL053047]

    Tierney, J. E., S. C. Lewis, B. I. Cook, A. N. LeGrande, and G. A. Schmidt. 2011. "Model, proxy and isotopic perspectives on the East African Humid Period." Earth Planet Sci Lett 307 (1-2): 103-112 [10.1016/j.epsl.2011.04.038]

    Roberts, C. D., A. N. LeGrande, and A. K. Tripati. 2011. "Sensitivity of seawater oxygen isotopes to climatic and tectonic boundary conditions in an early Paleogene simulation with GISS ModelE-R." Paleoceanography 26 (4): PA4203 [10.1029/2010PA002025]

    Legrande, A. N., and G. A. Schmidt. 2011. "Water isotopologues as a quantitative paleosalinity proxy." Paleoceanography 26 (3): PA3225 [10.1029/2010PA002043]

    Lewis, S. C., M. K. Gagan, L. K. Ayliffe, et al. J. Zhao, W. S. Hantoro, P. C. Treble, J. C. Hellstrom, A. N. Legrande, M. Kelley, G. A. Schmidt, and B. W. Suwargadi. 2011. "High-resolution stalagmite reconstructions of Australian–Indonesian monsoon rainfall variability during Heinrich stadial 3 and Greenland interstadial 4." Earth and Planetary Science Letters 303 (1-2): 133-142 [10.1016/j.epsl.2010.12.048]

    D'Arrigo, R. D., R. Seager, J. E. Smerdon, A. N. Legrande, and E. R. Cook. 2011. "The anomalous winter of 1783-1784: Was the Laki eruption or an analog of the 2009-2010 winter to blame?" Geophysical Research Letters 38 (5): L05706 [10.1029/2011GL046696]

    Lee, J., J. Worden, D. Noone, et al. K. Bowman, A. Eldering, A. N. Legrande, J. L. Li, G. A. Schmidt, and S. Sodemann. 2011. "Relating tropical ocean clouds to moist processes using water vapor isotope measurements." Atmos. Chem. Phys. 11 (2): 741-752 [10.5194/acp-11-741-2011]

    Lewis, S. C., A. N. LeGrande, M. Kelley, and G. A. Schmidt. 2010. "Water vapour source impacts on oxygen isotope variability in tropical precipitation during Heinrich events." Climate of the Past 6 (3): 325-343 [10.5194/cp-6-325-2010]

    Mann, M. E., G. A. Schmidt, S. K. Miller, and A. N. LeGrande. 2009. "Potential biases in inferring Holocene temperature trends from long-term borehole information." Geophysical Research Letters 36 (5): L05708 [10.1029/2008GL036354]

    LeGrande, A. N., and G. A. Schmidt. 2009. "Sources of Holocene variability of oxygen isotopes in paleoclimate archives." Climate of the Past 5 (3): 441-455 [10.5194/cp-5-441-2009]

    Robert, C. D., A. N. Legrande, and A. K. Tripati. 2009. "Climate sensitivity to Arctic seaway restriction during the early Paleogene." Earth Planet Sci Lett 286 (3-4): 576-585 [10.1016/j.epsl.2009.07.026]

    Carlson, A. E., F. S. Anslow, E. A. Obbink, et al. A. N. Legrande, D. J. Ullman, and J. M. Licciardi. 2009. "Surface-melt driven Laurentide Ice Sheet retreat during the early Holocene." Geophys Res Lett 36 (24): L24502 [10.1029/2009GL040948]

    Muller, J., M. Kylander, R. A. Weust, et al. D. Weiss, A. Martinez-Cortizas, A. N. Legrande, T. Jennerjahn, H. Behling, W. T. Anderson, and G. Jacobson. 2008. "Possible evidence for wet Heinrich phases in tropical NE Australia: the Lynch's Crater deposit." Quaternary Science Reviews 27 (5-6): 468-475 [10.1016/j.quascirev.2007.11.006]

    LeGrande, A. N., and G. A. Schmidt. 2008. "Ensemble, water isotope-enabled, coupled general circulation modeling insights into the 8.2 ka event." Paleoceanography 23 (3): PA3207 [10.1029/2008PA001610]

    Carlson, A. E., D. W. Oppo, R. E. Came, et al. A. N. Legrande, L. D. Keigwin, and W. B. Curry. 2008. "Subtropical Atlantic salinity variability and Atlantic meridional circulation during the last deglaciation." Geology 36 (12): 991-994 [10.1130/G25080A.1]

    Carlson, A. E., A. N. Legrande, D. W. Oppo, et al. R. E. Came, G. A. Schmidt, F. S. Anslow, J. M. Licciardi, and E. A. Obbink. 2008. "Rapid early Holocene deglaciation of the Laurentide ice sheet." Nature Geosci 1 (9): 620-624 [10.1038/ngeo285]

    Schmidt, G. A., A. N. Legrande, and G. Hoffmann. 2007. "Water isotope expressions of intrinsic and forced variability in a coupled ocean-atmosphere model." J. Geophys. Res. 112 (D10): D10103 [10.1029/2006JD007781]

    Oppo, D. W., G. A. Schmidt, and A. N. Legrande. 2007. "Seawater isotope constraints on tropical hydrology during the Holocene." Geophys Res Lett 34 (13): L13701 [10.1029/2007GL030017]

    LeGrande, A. N., and J. Lynch-Stieglitz. 2007. "Surface currents in the western North Atlantic during the Last Glacial Maximum." Geochemistry, Geophysics, Geosystems 8 (1): Q01N09 [10.1029/2006GC001371]

    Masson-Delmotte, V., M. Kageyama, P. Braconnot, et al. S. Charbit, G. Krinner, C. Ritz, E. Guilyardi, J. Jouzel, A. Abe-Ouchi, M. Crucifix, R. M. Gladstone, C. D. Hewitt, A. Kitoh, A. N. LeGrande, O. Marti, U. Merkel, T. Motoi, R. Ohgaito, B. Otto-Bliesner, W. R. Peltier, I. Ross, P. J. Valdes, G. Vettoretti, S. L. Weber, F. Wolk, and Y. Yu. 2006. "Past and future polar amplification of climate change: climate model intercomparisons and ice-core constraints." Clim Dyn 26 (5): 513-529 [10.1007/s00382-005-0081-9]

    LeGrande, A. N., G. A. Schmidt, D. T. Shindell, et al. C. V. Field, R. L. Miller, D. M. Koch, G. Faluvegi, and G. Hoffmann. 2006. "Consistent simulations of multiple proxy responses to an abrupt climate change event." Proceedings of the National Academy of Sciences 103 (4): 837-842 [10.1073/pnas.0510095103]

    LeGrande, A. N., and G. A. Schmidt. 2006. "Global gridded data set of the oxygen isotopic composition in seawater." Geophys Res Lett 33 (12): L12604 [10.1029/2006GL026011]

    Gladstone, R. M., I. Ross, P. J. Valdes, et al. A. Abe-Ouchi, P. Braconnot, S. Brewer, M. Kageyama, A. Kitoh, A. LeGrande, O. Marti, R. Ohgaito, B. Otto-Bliesner, W. R. Peltier, and G. Vettoretti. 2005. "Mid-Holocene NAO: A PMIP2 model intercomparison." Geophysical Research Letters 32 (16): L16707 [10.1029/2005GL023596]

    LeGrande, A. N., J. Lynch-Stieglitz, and E. C. Farmer. 2004. "Oxygen isotopic composition of Globorotalia truncatulinoides as a proxy for intermediate depth density." Paleoceanography 19 (4): PA4025 [10.1029/2004PA001045]

    Non-Refereed

    Pausata, F. S., A. N. LeGrande, and W. Roberts. 2016. "How Will Sea Ice Loss Affect the Greenland Ice Sheet?" Eos 97 (9): 10 [10.1029/2016eo047961]

    LeGrande, A. N. 2015. "Volcanoes and Climate." PAGES -- Past Global Changes 23 (2): 41-84 [Full Text (Link)]

    Schmidt, G. A., and A. N. Legrande. 2005. "The Goldilocks abrupt climate change event." Quaternary Science Reviews 24 (10-11): 1109-1110 [10.1016/j.quascirev.2005.01.015]

                                                                                                                                                                                            
    NASA Logo, National Aeronautics and Space Administration