Dr. H Jay Zwally

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Dr. H Jay Zwally

  • (AST, EARTH SCI REMOTE SENSING)
  • 301.614.5643 | 301.614.5644
  • NASA/GSFC
  • Mail Code: 615
  • Greenbelt , MD 20771
  • Employer: NASA
  • Brief Bio

    Dr. H. Jay Zwally is Chief Cryospheric Scientist at NASA’s Goddard Space Flight Center and Project Scientist for the Ice Cloud and Land Elevation Satellite (ICESat). His recent research includes leading comprehensive analysis of the mass balance of the Greenland and Antarctic ice sheets and ice shelves, discovery of the melt-acceleration effect on the flow of the Greenland ice sheet, and comprehensive mapping of sea ice freeboard and thickness. At NASA since 1974, his early research included radiative modeling of microwave emission from firn, development of concepts for remote measurement of accumulation rates and surface melting, the first observation and interpretation of the Weddell Polynya, and systematic correction and compilation of satellite passive-microwave data sets that led to several sea ice atlases. Dr. Zwally was an early and persistent proponent of the importance of studying the mass balance of the Earth’s ice-sheets and their contributions to sea level change, and the use of satellite altimetry for those purposes. He pioneered the use of ocean-radar altimetry for mapping ice sheet topography and studies of mass balance. He led promotion and development of NASA’s ICESat mission thorough to successful measurements of ice-sheet elevation changes and pioneering laser measurements of sea-ice freeboard. He was been a key participant in the promotion, design, and planning for ICESat-2 and is on the ICESat-2 Science Definition Team. Dr. Zwally was on the Mars Orbiting Laser Altimeter (MOLA) science team and provided key insights to interpretation of the Mars northern ice cap as predominately water ice with an outlying cap remnant using the laser-elevation data.

    At Goddard in the 1970's, Dr. Zwally led the establishment of an internationally-recognized cryospheric research program and has continued to recruit ice researchers, many of whom have become leading scientists. Prior to his work at NASA, Dr. Zwally was Program Manager for Glaciology and Remote Sensing in the NSF's Division of Polar Programs, where he managed the initiation of the interdisciplinary Ross Ice Shelf Project, the Greenland Ice Sheet Project, improved airborne radar mapping of ice sheet thickness, and planning for a West Antarctic ice sheet project. Dr. Zwally has over 130 research publications in glaciology, climate and ice science, and physics. He has a Ph.D. in physics with a minor in mathematics from the University of Maryland and a B.S. in mechanical/aeronautical engineering from Drexel University. He has also been effective in communicating ice and climate science to the public, including appearances on NOVA, ABC, CNN, Discovery, Voice of America, BBC, and MSNBC’s Countdown. He has been an ESA-selected investigator for ERS-1, ERS-2, Envisat, and CryoSat. During the 1990's, Dr. Zwally was on the Environmental Task Force/Medea committee advising the CIA and other agencies on the use of classified assets for environmental purposes and security. He has been active on national and international advisory committees and has served as external advisor for PhD students at several universities.

    Positions/Employment

    10 / 2007 - Present

    Chief Cryosphere Scientist (ST level)

    NASA Goddard Space Flight Center, Greenbelt, MD
    2005 - Present

    ICESat Project Scientist

    NASA Goddard Space Flight Center, Greenbelt, MD
    7 / 1983 - 2007

    Senior Research Scientist

    NASA Goddard Space Flight Center, Greenbelt, MD
    2 / 1980 - 7 / 1983

    Supervisory Physical Scientist (Head, Ice Section)

    NASA Goddard Space Flight Center, Greenbelt, MD
    5 / 1974 - 2 / 1980

    Physical Scientist/Oceanographer

    NASA Goddard Space Flight Center, Greenbelt, MD
    3 / 1972 - 5 / 1974

    Program Manager for Glaciology and Remote Sensing

    Division of Polar Programs, National Science Foundation, Washington, DC
    1 / 1969 - 4 / 1972

    Visiting Research Assistant Professor

    Institute for Fluid Dynamics and Applied Mathematics University of Maryland, College Park, MD
    6 / 1962 - 10 / 1963

    Physical Scientist/Space Sciences

    NASA Goddard Space Flight Center, Greenbelt, MD

    Education

    1969 Ph.D. Physics major, mathematics minor University of Maryland

    Thesis: Single-Electron Capture by C4+ in Helium, Neon and Argon below 40 keV

    1961 B.S. Mechanical/Aeronautical Engineering Drexel University

    Professional Societies

    International Glaciological Society , 1972 - Present
    Former member of Executive Council
    American Geophysical Union, 1974 - Present

    Professional Service

    External Committees:

    - National Academy of Science Panel on Cryosphere, Hydrology/Water Resources, and Land-Surface for Committee on Climate, Energy, and National Security

    - Steering Group for Climate in Cryosphere (CLIC) of the World Climate Research Program

    - Environmental Task Force/Medea Advisory Committee

    - International Glaciology Executive Council

    - NAS Advisory Committee on Niagra River Ice Boom

    - US Representative on SCAR Specialists on Antarctic Climate Research

    Awards

    2009 NASA Exceptional Achievement Medal for Leadership of ICESat Mission

    2005 Goddard Award of Merit for Outstanding Contributions and Scientific Leadership

    2003 Laboratory Peer Award for Outstanding Publication

    2002 Editor’s Citation for Excellence in Refereeing for JGR-Atmospheres

    2001 Editor’s Citation for Excellence in Refereeing for JGR-Atmospheres

    1996 NASA Outstanding Scientific Achievement Award

    1995 Excellence in Federal Career

    1982 NASA Group Achievement Award to Authors of Antarctic Sea Ice Atlas.

    1978 Goddard Exceptional Performance Award for leadership in establishing a recognized cryospheric research program.

    1963- 1966 NASA Fellowship at University of Maryland.

    Selected Publications

    Refereed

    Yi, D., and H. J. Zwally. 2014. "Arctic Sea Ice Freeboard and Thickness." Boulder, Colorado USA: National Snow and Ice Data Center http://nsidc.org/dat

    McAdoo, D., S. Farrell, S. Laxon, et al. A. Ridout, H. Zwally, and D. Yi. 2013. "Gravity of the Arctic Ocean from satellite data with validations using airborne gravimetry: Oceanographic implications." JOURNAL OF GEOPHYSICAL RESEARCH: OCEANS 118 1-14 [ 10.1002/jgrc.20080]

    Xie, H., A. E. Tekeli, S. F. Ackley, D. Yi, and H. J. Zwally. 2013. "Sea ice thickness estimations from ICESat Altimetry over the Bellingshausen and Amundsen Seas, 2003–2009." JGR Oceans 118 2438–2453 [10.1002/jgrc.20179]

    Ozsoy-Cicek, B., S. Ackley, H. Xie, D. Yi, and H. J. Zwally. 2013. "Sea ice thickness retrieval algorithms based on in situ surface elevation and thickness values for application to altimetry." JGR Oceans [DOI: 10.1002/jgrc.20252]

    Wang, W., J. Li, and H. Zwally. 2012. "Dynamic inland propagation of thinning due to ice loss at the margins of the Greenland ice sheet." Journal of Glaciology 58 (210): 734-740(7) [ 10.3189/2012JoG11J187]

    Shepherd, A., E. Ivins, G. A, et al. V. Barletta, M. Bentley, S. Bettadpur, K. Briggs, D. Bromwich, R. Forsberg, N. Galin, M. Horwath, S. Jacobs, I. Joughin, M. King, J. Lenaerts, J. Li, S. Ligtenberg, A. Luckman, S. B. Luthcke, M. McMillan, R. Meister, G. Milne, J. Mouginot, A. Muir, J. Nicolas, J. Paden, A. Payne, H. Rott, H. Pritchard, E. Rignot, L. Sørensen, T. Scambos, B. Scheuchl, E. Schrama, B. Smith, A. Sundal, J. Angelen, W. van de Berg, M. van den Broeke, D. Vaughan, I. Velicogna, J. Wahr, P. Whitehouse, D. Wingham, D. Yi, D. Young, and H. J. Zwally. 2012. "A Reconciled Estimate of Ice-Sheet Mass Balance." Science AAAS 338 (6111): 1183-1189 [ 10.1126/science.1228102]

    Farrell, S., D. McAdoo, S. Laxon, et al. H. Zwally, D. Yi, A. Ridout, and K. Giles. 2012. "Mean Dynamic Topography of the Arctic Ocean." Geophys Res Lett 39 L01601 [ 10.1029/2011GL050052]

    Xie, H., S. F. Ackley, D. Yi, et al. H. J. Zwally, P. Wagner, B. Weissling, M. Lewis, and K. Ye. 2011. "Sea ice thickness distribution of the Bellingshausen Sea from surface measurements and ICESat altimetry." Deep Sea Research [10.1016/j.dsr2.2010.10.038]

    Worby, A. P., A. Steer, J. L. Lieser, et al. P. Heil, D. Yi, T. Markus, I. Allison, R. A. Massom, N. Galin, and H. J. Zwally. 2011. "Regional-scale sea-ice and snow thickness distributions from in situ and satellite measurements over East Antarctica during SIPEX 2007." Deep Sea Research 58 (9-10): 1125-1136 [10.1016/j.dsr2.2010.12.001]

    Zwally, H. J., J. Li, A. C. Brenner, et al. M. Beckley, H. G. Cornejo, J. DiMarzio, M. B. Giovnetto, T. A. Neumann, J. Robbins, J. L. Saba, D. Yi, and W. Wang. 2011. "Greenland ice sheet mass balance: distribution of increased mass loss with climate warming 2003-2007 versus 1992-2002." Journal of Glaciology

    Yi, D., H. J. Zwally, and J. W. Robbins. 2011. "ICESat observations of seasonal and interannual variations of sea-ice freeboard and estimated thickness in the Weddell Sea (2003-2009)." Annals of Glaciology 43-51

    Abdalati, W., H. J. Zwally, R. A. Bindschadler, et al. B. Csatho, S. L. Farrell, H. Fricker, D. Harding, R. Kwok, M. Lefsky, T. Markus, A. Marshak, T. A. Neumann, S. Palm, B. Schutz, B. Smith, and C. Spinhirne. 2010. "The ICESat-2 Laser Altimetry Mission." Proc IEEE 98 (5): 735-751 [ 10.1109/JPROC.2009.2034765]

    Kwok, R., G. F. Cunningham, M. Wensnahan, et al. I. Rigor, H. J. Zwally, and D. Yi. 2009. "Thinning and volume loss of the Arctic Ocean sea ice cover: 2003–2008." J. Geophys. Res. 114 ( C07005): [10.1029/2009JC005312]

    Farrell, S., S. Laxon, D. McAdoo, D. Yi, and H. J. Zwally. 2009. "Five years of Arctic sea ice freeboard measurements from the Ice Cloud and land Elevation Satellite." J Geophys Res 114 (C04008): [ 10.1029/2008JC005074]

    Kwok, R., G. Cunningham, M. Wensnahan, I. Rigor, and H. J. Zwally. 2009. "Thinning and volume loss of the Arctic Ocean sea ice cover: 2003–2008." J Geophys Res 114 (C07005): [ 10.1029/2009JC005312]

    McAdoo, D., S. Farrell, S. Laxon, et al. H. Zwally, D. Yi, and A. Ridout. 2008. "Arctic Ocean gravity field derived from ICESat and ERS-2 altimetry: Tectonic implications." J Geophys Res 113 (B05408): 12 pp [ 10.1029/2007JB005217]

    Zwally, H. J., D. Yi, R. Kwok, and Y. Zhao. 2008. "ICESat measurements of sea ice freeboard and estimates of sea ice thickness in the Weddell Sea." J Geophys Res 113 (C02S15): 17 pp [ 10.1029/2007JC004284]

    Li, J., H. Zwally, and J. Comiso. 2007. "Ice sheet elevation changes caused by variations of the firn compaction rate induced by satellite observed temperature variations (1982-2003)." Ann. of Glaciology 46 (1): 8-13 [10.3189/172756407782871486]

    Maslanik, J., C. Fowler, J. Stroeve, et al. S. Drobot, H. J. Zwally, D. Yi, and W. Emery. 2007. "A younger, thinner Arctic ice cover: Increased potential for rapid, extensive sea-ice loss." Geophys Res Lett 34 (L24501): 5 pp [10.1029/2007GL032043]

    Brenner, A. C., H. J. Zwally, and J. P. Dimarzio. 2007. "Precision and Accuracy of Satellite Radar and Laser Altimeter Data Over the Continental Ice Sheets." IEEE Trans Geosci Remote Sens 45 (2): 321-333 [10.1109/TGRS.2006.887172]

    Li, J. J., H. J. Zwally, and J. C. Comiso. 2007. "Ice-sheet elevation changes caused by variations of the firn compaction rate induced by satellite-observed temperature variations (1982—2003)." Ann Glaciol 46 (1): 8-13 [10.3189/172756407782871486]

    Kwok, R., G. F. Cunningham, H. J. Zwally, and D. Yi. 2007. "Ice, Cloud, and land Elevation Satellite (ICESat) over Arctic sea ice: Retrieval of freeboard." J Geophys Res 112 (C12013): 19 pp [10.1029/2006JC003978 ]

    Luthcke, S. B., H. J. Zwally, W. Abdalati, et al. D. D. Rowlands, R. D. Ray, R. S. Nerem, F. G. Lemoine, J. J. McCarthy, and D. S. Chinn. 2006. "Recent Greenland Ice Mass Loss by Drainage System from Satellite Gravity Observations." Science 314 [10.1126/science.1130776]

    Kwok, R., G. Cunningham, H. J. Zwally, and D. Yi. 2006. "ICESat over Arctic sea ice: Interpretation of altimertric and reflectivity profiles." J Geophys Res 111 (C06006): 20 pp [10.1029/2005JC003175 ]

    Shuman, C. A., H. J. Zwally, B. E. Schutz, et al. A. C. Brenner, J. P. Dimarzio, V. P. Suchdeo, and H. Fricker. 2006. "ICESat Antarctic elevation data: Preliminary precision and accuracy assessment." Geophys Res Lett 33 (L07501): 4 pp [10.1029/2005GL025227]

    Yi, D., H. J. Zwally, and X. Sun. 2005. "ICESat Measurement of Greenland Ice Sheet Surface Slope and Roughness." Annals of Glaciology 42 83-89

    Schutz, B. E., H. J. Zwally, C. A. Shuman, D. W. Hancock, and J. DiMarzio. 2005. "Overview of the ICESat Mission." Geophys Res Lett 32 (L21S01): 4 pp

    Zwally, H. J., M. Giovinetto, J. Li, et al. H. Cornejo, M. Beckley, A. C. Brenner, J. Saba, and D. Yi. 2005. "Mass changes of the Greenland and Antarctic ice sheets and shelves and contributions to sea-level rise: 19922002." J Glaciol 51 (175): 509-527

    Kwok, R., H. J. Zwally, and D. Yi. 2004. "ICESat Observations of Arctic Sea Ice: A First Look. Geophysical Research Letters. 31, L16401, doi: 10.1029/2004GL020309." Geophysical Research Letters 31 (L16401): [10.1029/2004GL020309]

    Thomas, R., E. Rignot, G. Casassa, et al. P. Kanagaratnam, C. Acuna, T. Akins, H. Brecher, E. Frederick, P. Gogineni, W. B. Krabill, S. Manizade, H. Ramamoorthy, A. Rivera, R. Russell, J. G. Sonntag, R. Swift, J. Yungel, and H. J. Zwally. 2004. "Accelerated Sea-Level Rise from West Antarctica." Science 306 255-258

    Li, J. J., H. J. Zwally, H. G. Cornejo, and D. Yi. 2003. "Seasonal variation of snow-surface elevation in North Greenland as modeled and detected by satellite radar altimetry." Annals of Glaciology 37 233-238

    Zwally, H. J., J. C. Comiso, C. L. Parkinson, D. J. Cavalieri, and P. Gloersen. 2002. "Variability of Antarctic sea ice 1979-1998." Journal of Geophysical Research 107 (C5): 9-1 - 9-19. [10.1029/2000JC000733]

    Smith, D. E., M. T. Zuber, H. V. Frey, et al. J. B. Garvin, J. W. Head, D. O. Muhleman, G. H. Pettengill, R. J. Phillips, S. C. Solomon, H. J. Zwally, W. B. Banerdt, T. C. Duxbury, M. P. Golombek, F. G. Lemoine, G. A. Neumann, D. D. Rowlands, O. Aharonson, P. G. Ford, A. B. Ivanov, C. L. Johnson, P. J. McGovern, J. B. Abshire, R. S. Afzal, and X. Sun. 2001. "Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of Mars." Journal of Geophysical Research 106 23689 [Full Text (Link)] [10.1029/2000JE001364]

    Cavalieri, D. J., C. L. Parkinson, P. Gloersen, J. C. Comiso, and H. J. Zwally. 1999. "Deriving long-term time series of sea ice cover from satellite passive-microwave multisensor data sets." Journal of Geophysical Research 104 (C7): 15,803-15,814. [10.1029/1999JC900081]

    Gloersen, P., C. L. Parkinson, D. J. Cavalieri, J. C. Comiso, and H. J. Zwally. 1999. "Spatial distribution of trends and seasonality in the hemispheric sea ice covers: 1978-1996." Journal of Geophysical Research 104 (C9): 20,827-20,835.

    Parkinson, C. L., D. J. Cavalieri, P. Gloersen, H. J. Zwally, and J. C. Comiso. 1999. "Arctic sea ice extents, areas, and trends, 1978-1996." Journal of Geophysical Research 104 (C9): 20,837-20,856. [10.1029/1999JC900082]

    Smith, D. E., M. T. Zuber, S. C. Solomon, et al. R. J. Phillips, J. W. Head, J. B. Garvin, W. B. Banerdt, H. V. Frey, D. O. Muhleman, G. H. Pettengill, G. A. Neumann, F. G. Lemoine, J. B. Abshire, O. Aharonson, C. D. Brown, S. A. Hauck, A. B. Ivanov, P. J. McGovern, H. J. Zwally, and T. C. Duxbury. 1999. "The global topography of Mars and implications for surface evolution." Science 284 1495-1503 [ 10.1126/science.284.5419.1495]

    Cavalieri, D. J., P. Gloersen, C. L. Parkinson, J. C. Comiso, and H. J. Zwally. 1997. "Observed hemispheric asymmetry in global sea ice changes." Science 278 1104-1106.

    Gloersen, P., W. J. Campbell, D. J. Cavalieri, et al. J. C. Comiso, C. L. Parkinson, and H. J. Zwally. 1993. "Satellite passive microwave observations and analysis of Arctic and Antarctic sea ice, 1978-1987." Annals of Glaciology 17 149-154.

    Gloersen, P., W. J. Campbell, D. J. Cavalieri, et al. J. C. Comiso, C. L. Parkinson, and H. J. Zwally. 1992. "Arctic and Antarctic Sea Ice, 1978-1987: Satellite Passive-Microwave Observations and Analysis." NASA SP-511. 290 pp.

    Parkinson, C. L., J. C. Comiso, H. J. Zwally, et al. D. J. Cavalieri, P. Gloersen, and W. J. Campbell. 1987. "Arctic Sea Ice, 1973-1976: Satellite Passive-Microwave Observations." NASA SP-489. 296 pp.

    Parkinson, C. L., J. C. Comiso, H. J. Zwally, et al. D. J. Cavalieri, P. Gloersen, and W. J. Campbell. 1987. "Seasonal and regional variations of Northern Hemisphere sea ice as illustrated with satellite passive-microwave data for 1974." Annals of Glaciology 9 119-126.

    Zwally, H. J., J. C. Comiso, C. L. Parkinson, et al. W. J. Campbell, F. D. Carsey, and P. Gloersen. 1983. "Antarctic Sea Ice, 1973-1976: Satellite Passive-Microwave Observations." NASA SP-459. 206 pp.

    Zwally, H. J., C. L. Parkinson, and J. C. Comiso. 1983. "Variability of Antarctic sea ice and changes in carbon dioxide." Science 220 (4601): 1005-1012.

    Non-Refereed

    Sun, X., J. F. Cavanaugh, J. C. SMith, et al. J. B. Abshire, J. L. Mcgarry, G. A. Neumann, D. J. Harding, H. J. Zwally, D. E. Smith, and M. T. Zuber. 2012. "SPACE LIDARS DEVELOPED AT NASA GSFC." IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (JSTARS) (Submitted)

    Talks, Presentations and Posters

    Numerous invited and contributed talks, presentations, and posters 2014

    Brief Bio

    Dr. H. Jay Zwally is Chief Cryospheric Scientist at NASA’s Goddard Space Flight Center and Project Scientist for the Ice Cloud and Land Elevation Satellite (ICESat). His recent research includes leading comprehensive analysis of the mass balance of the Greenland and Antarctic ice sheets and ice shelves, discovery of the melt-acceleration effect on the flow of the Greenland ice sheet, and comprehensive mapping of sea ice freeboard and thickness. At NASA since 1974, his early research included radiative modeling of microwave emission from firn, development of concepts for remote measurement of accumulation rates and surface melting, the first observation and interpretation of the Weddell Polynya, and systematic correction and compilation of satellite passive-microwave data sets that led to several sea ice atlases. Dr. Zwally was an early and persistent proponent of the importance of studying the mass balance of the Earth’s ice-sheets and their contributions to sea level change, and the use of satellite altimetry for those purposes. He pioneered the use of ocean-radar altimetry for mapping ice sheet topography and studies of mass balance. He led promotion and development of NASA’s ICESat mission thorough to successful measurements of ice-sheet elevation changes and pioneering laser measurements of sea-ice freeboard. He was been a key participant in the promotion, design, and planning for ICESat-2 and is on the ICESat-2 Science Definition Team. Dr. Zwally was on the Mars Orbiting Laser Altimeter (MOLA) science team and provided key insights to interpretation of the Mars northern ice cap as predominately water ice with an outlying cap remnant using the laser-elevation data.

    At Goddard in the 1970's, Dr. Zwally led the establishment of an internationally-recognized cryospheric research program and has continued to recruit ice researchers, many of whom have become leading scientists. Prior to his work at NASA, Dr. Zwally was Program Manager for Glaciology and Remote Sensing in the NSF's Division of Polar Programs, where he managed the initiation of the interdisciplinary Ross Ice Shelf Project, the Greenland Ice Sheet Project, improved airborne radar mapping of ice sheet thickness, and planning for a West Antarctic ice sheet project. Dr. Zwally has over 130 research publications in glaciology, climate and ice science, and physics. He has a Ph.D. in physics with a minor in mathematics from the University of Maryland and a B.S. in mechanical/aeronautical engineering from Drexel University. He has also been effective in communicating ice and climate science to the public, including appearances on NOVA, ABC, CNN, Discovery, Voice of America, BBC, and MSNBC’s Countdown. He has been an ESA-selected investigator for ERS-1, ERS-2, Envisat, and CryoSat. During the 1990's, Dr. Zwally was on the Environmental Task Force/Medea committee advising the CIA and other agencies on the use of classified assets for environmental purposes and security. He has been active on national and international advisory committees and has served as external advisor for PhD students at several universities.

    Refereed

    Yi, D., and H. J. Zwally. 2014. "Arctic Sea Ice Freeboard and Thickness." Boulder, Colorado USA: National Snow and Ice Data Center http://nsidc.org/dat

    McAdoo, D., S. Farrell, S. Laxon, et al. A. Ridout, H. Zwally, and D. Yi. 2013. "Gravity of the Arctic Ocean from satellite data with validations using airborne gravimetry: Oceanographic implications." JOURNAL OF GEOPHYSICAL RESEARCH: OCEANS 118 1-14 [ 10.1002/jgrc.20080]

    Xie, H., A. E. Tekeli, S. F. Ackley, D. Yi, and H. J. Zwally. 2013. "Sea ice thickness estimations from ICESat Altimetry over the Bellingshausen and Amundsen Seas, 2003–2009." JGR Oceans 118 2438–2453 [10.1002/jgrc.20179]

    Ozsoy-Cicek, B., S. Ackley, H. Xie, D. Yi, and H. J. Zwally. 2013. "Sea ice thickness retrieval algorithms based on in situ surface elevation and thickness values for application to altimetry." JGR Oceans [DOI: 10.1002/jgrc.20252]

    Wang, W., J. Li, and H. Zwally. 2012. "Dynamic inland propagation of thinning due to ice loss at the margins of the Greenland ice sheet." Journal of Glaciology 58 (210): 734-740(7) [ 10.3189/2012JoG11J187]

    Shepherd, A., E. Ivins, G. A, et al. V. Barletta, M. Bentley, S. Bettadpur, K. Briggs, D. Bromwich, R. Forsberg, N. Galin, M. Horwath, S. Jacobs, I. Joughin, M. King, J. Lenaerts, J. Li, S. Ligtenberg, A. Luckman, S. B. Luthcke, M. McMillan, R. Meister, G. Milne, J. Mouginot, A. Muir, J. Nicolas, J. Paden, A. Payne, H. Rott, H. Pritchard, E. Rignot, L. Sørensen, T. Scambos, B. Scheuchl, E. Schrama, B. Smith, A. Sundal, J. Angelen, W. van de Berg, M. van den Broeke, D. Vaughan, I. Velicogna, J. Wahr, P. Whitehouse, D. Wingham, D. Yi, D. Young, and H. J. Zwally. 2012. "A Reconciled Estimate of Ice-Sheet Mass Balance." Science AAAS 338 (6111): 1183-1189 [ 10.1126/science.1228102]

    Farrell, S., D. McAdoo, S. Laxon, et al. H. Zwally, D. Yi, A. Ridout, and K. Giles. 2012. "Mean Dynamic Topography of the Arctic Ocean." Geophys Res Lett 39 L01601 [ 10.1029/2011GL050052]

    Xie, H., S. F. Ackley, D. Yi, et al. H. J. Zwally, P. Wagner, B. Weissling, M. Lewis, and K. Ye. 2011. "Sea ice thickness distribution of the Bellingshausen Sea from surface measurements and ICESat altimetry." Deep Sea Research [10.1016/j.dsr2.2010.10.038]

    Worby, A. P., A. Steer, J. L. Lieser, et al. P. Heil, D. Yi, T. Markus, I. Allison, R. A. Massom, N. Galin, and H. J. Zwally. 2011. "Regional-scale sea-ice and snow thickness distributions from in situ and satellite measurements over East Antarctica during SIPEX 2007." Deep Sea Research 58 (9-10): 1125-1136 [10.1016/j.dsr2.2010.12.001]

    Zwally, H. J., J. Li, A. C. Brenner, et al. M. Beckley, H. G. Cornejo, J. DiMarzio, M. B. Giovnetto, T. A. Neumann, J. Robbins, J. L. Saba, D. Yi, and W. Wang. 2011. "Greenland ice sheet mass balance: distribution of increased mass loss with climate warming 2003-2007 versus 1992-2002." Journal of Glaciology

    Yi, D., H. J. Zwally, and J. W. Robbins. 2011. "ICESat observations of seasonal and interannual variations of sea-ice freeboard and estimated thickness in the Weddell Sea (2003-2009)." Annals of Glaciology 43-51

    Abdalati, W., H. J. Zwally, R. A. Bindschadler, et al. B. Csatho, S. L. Farrell, H. Fricker, D. Harding, R. Kwok, M. Lefsky, T. Markus, A. Marshak, T. A. Neumann, S. Palm, B. Schutz, B. Smith, and C. Spinhirne. 2010. "The ICESat-2 Laser Altimetry Mission." Proc IEEE 98 (5): 735-751 [ 10.1109/JPROC.2009.2034765]

    Kwok, R., G. F. Cunningham, M. Wensnahan, et al. I. Rigor, H. J. Zwally, and D. Yi. 2009. "Thinning and volume loss of the Arctic Ocean sea ice cover: 2003–2008." J. Geophys. Res. 114 ( C07005): [10.1029/2009JC005312]

    Farrell, S., S. Laxon, D. McAdoo, D. Yi, and H. J. Zwally. 2009. "Five years of Arctic sea ice freeboard measurements from the Ice Cloud and land Elevation Satellite." J Geophys Res 114 (C04008): [ 10.1029/2008JC005074]

    Kwok, R., G. Cunningham, M. Wensnahan, I. Rigor, and H. J. Zwally. 2009. "Thinning and volume loss of the Arctic Ocean sea ice cover: 2003–2008." J Geophys Res 114 (C07005): [ 10.1029/2009JC005312]

    McAdoo, D., S. Farrell, S. Laxon, et al. H. Zwally, D. Yi, and A. Ridout. 2008. "Arctic Ocean gravity field derived from ICESat and ERS-2 altimetry: Tectonic implications." J Geophys Res 113 (B05408): 12 pp [ 10.1029/2007JB005217]

    Zwally, H. J., D. Yi, R. Kwok, and Y. Zhao. 2008. "ICESat measurements of sea ice freeboard and estimates of sea ice thickness in the Weddell Sea." J Geophys Res 113 (C02S15): 17 pp [ 10.1029/2007JC004284]

    Li, J., H. Zwally, and J. Comiso. 2007. "Ice sheet elevation changes caused by variations of the firn compaction rate induced by satellite observed temperature variations (1982-2003)." Ann. of Glaciology 46 (1): 8-13 [10.3189/172756407782871486]

    Maslanik, J., C. Fowler, J. Stroeve, et al. S. Drobot, H. J. Zwally, D. Yi, and W. Emery. 2007. "A younger, thinner Arctic ice cover: Increased potential for rapid, extensive sea-ice loss." Geophys Res Lett 34 (L24501): 5 pp [10.1029/2007GL032043]

    Brenner, A. C., H. J. Zwally, and J. P. Dimarzio. 2007. "Precision and Accuracy of Satellite Radar and Laser Altimeter Data Over the Continental Ice Sheets." IEEE Trans Geosci Remote Sens 45 (2): 321-333 [10.1109/TGRS.2006.887172]

    Li, J. J., H. J. Zwally, and J. C. Comiso. 2007. "Ice-sheet elevation changes caused by variations of the firn compaction rate induced by satellite-observed temperature variations (1982—2003)." Ann Glaciol 46 (1): 8-13 [10.3189/172756407782871486]

    Kwok, R., G. F. Cunningham, H. J. Zwally, and D. Yi. 2007. "Ice, Cloud, and land Elevation Satellite (ICESat) over Arctic sea ice: Retrieval of freeboard." J Geophys Res 112 (C12013): 19 pp [10.1029/2006JC003978 ]

    Luthcke, S. B., H. J. Zwally, W. Abdalati, et al. D. D. Rowlands, R. D. Ray, R. S. Nerem, F. G. Lemoine, J. J. McCarthy, and D. S. Chinn. 2006. "Recent Greenland Ice Mass Loss by Drainage System from Satellite Gravity Observations." Science 314 [10.1126/science.1130776]

    Kwok, R., G. Cunningham, H. J. Zwally, and D. Yi. 2006. "ICESat over Arctic sea ice: Interpretation of altimertric and reflectivity profiles." J Geophys Res 111 (C06006): 20 pp [10.1029/2005JC003175 ]

    Shuman, C. A., H. J. Zwally, B. E. Schutz, et al. A. C. Brenner, J. P. Dimarzio, V. P. Suchdeo, and H. Fricker. 2006. "ICESat Antarctic elevation data: Preliminary precision and accuracy assessment." Geophys Res Lett 33 (L07501): 4 pp [10.1029/2005GL025227]

    Yi, D., H. J. Zwally, and X. Sun. 2005. "ICESat Measurement of Greenland Ice Sheet Surface Slope and Roughness." Annals of Glaciology 42 83-89

    Schutz, B. E., H. J. Zwally, C. A. Shuman, D. W. Hancock, and J. DiMarzio. 2005. "Overview of the ICESat Mission." Geophys Res Lett 32 (L21S01): 4 pp

    Zwally, H. J., M. Giovinetto, J. Li, et al. H. Cornejo, M. Beckley, A. C. Brenner, J. Saba, and D. Yi. 2005. "Mass changes of the Greenland and Antarctic ice sheets and shelves and contributions to sea-level rise: 19922002." J Glaciol 51 (175): 509-527

    Kwok, R., H. J. Zwally, and D. Yi. 2004. "ICESat Observations of Arctic Sea Ice: A First Look. Geophysical Research Letters. 31, L16401, doi: 10.1029/2004GL020309." Geophysical Research Letters 31 (L16401): [10.1029/2004GL020309]

    Thomas, R., E. Rignot, G. Casassa, et al. P. Kanagaratnam, C. Acuna, T. Akins, H. Brecher, E. Frederick, P. Gogineni, W. B. Krabill, S. Manizade, H. Ramamoorthy, A. Rivera, R. Russell, J. G. Sonntag, R. Swift, J. Yungel, and H. J. Zwally. 2004. "Accelerated Sea-Level Rise from West Antarctica." Science 306 255-258

    Li, J. J., H. J. Zwally, H. G. Cornejo, and D. Yi. 2003. "Seasonal variation of snow-surface elevation in North Greenland as modeled and detected by satellite radar altimetry." Annals of Glaciology 37 233-238

    Zwally, H. J., J. C. Comiso, C. L. Parkinson, D. J. Cavalieri, and P. Gloersen. 2002. "Variability of Antarctic sea ice 1979-1998." Journal of Geophysical Research 107 (C5): 9-1 - 9-19. [10.1029/2000JC000733]

    Smith, D. E., M. T. Zuber, H. V. Frey, et al. J. B. Garvin, J. W. Head, D. O. Muhleman, G. H. Pettengill, R. J. Phillips, S. C. Solomon, H. J. Zwally, W. B. Banerdt, T. C. Duxbury, M. P. Golombek, F. G. Lemoine, G. A. Neumann, D. D. Rowlands, O. Aharonson, P. G. Ford, A. B. Ivanov, C. L. Johnson, P. J. McGovern, J. B. Abshire, R. S. Afzal, and X. Sun. 2001. "Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of Mars." Journal of Geophysical Research 106 23689 [Full Text (Link)] [10.1029/2000JE001364]

    Cavalieri, D. J., C. L. Parkinson, P. Gloersen, J. C. Comiso, and H. J. Zwally. 1999. "Deriving long-term time series of sea ice cover from satellite passive-microwave multisensor data sets." Journal of Geophysical Research 104 (C7): 15,803-15,814. [10.1029/1999JC900081]

    Gloersen, P., C. L. Parkinson, D. J. Cavalieri, J. C. Comiso, and H. J. Zwally. 1999. "Spatial distribution of trends and seasonality in the hemispheric sea ice covers: 1978-1996." Journal of Geophysical Research 104 (C9): 20,827-20,835.

    Parkinson, C. L., D. J. Cavalieri, P. Gloersen, H. J. Zwally, and J. C. Comiso. 1999. "Arctic sea ice extents, areas, and trends, 1978-1996." Journal of Geophysical Research 104 (C9): 20,837-20,856. [10.1029/1999JC900082]

    Smith, D. E., M. T. Zuber, S. C. Solomon, et al. R. J. Phillips, J. W. Head, J. B. Garvin, W. B. Banerdt, H. V. Frey, D. O. Muhleman, G. H. Pettengill, G. A. Neumann, F. G. Lemoine, J. B. Abshire, O. Aharonson, C. D. Brown, S. A. Hauck, A. B. Ivanov, P. J. McGovern, H. J. Zwally, and T. C. Duxbury. 1999. "The global topography of Mars and implications for surface evolution." Science 284 1495-1503 [ 10.1126/science.284.5419.1495]

    Cavalieri, D. J., P. Gloersen, C. L. Parkinson, J. C. Comiso, and H. J. Zwally. 1997. "Observed hemispheric asymmetry in global sea ice changes." Science 278 1104-1106.

    Gloersen, P., W. J. Campbell, D. J. Cavalieri, et al. J. C. Comiso, C. L. Parkinson, and H. J. Zwally. 1993. "Satellite passive microwave observations and analysis of Arctic and Antarctic sea ice, 1978-1987." Annals of Glaciology 17 149-154.

    Gloersen, P., W. J. Campbell, D. J. Cavalieri, et al. J. C. Comiso, C. L. Parkinson, and H. J. Zwally. 1992. "Arctic and Antarctic Sea Ice, 1978-1987: Satellite Passive-Microwave Observations and Analysis." NASA SP-511. 290 pp.

    Parkinson, C. L., J. C. Comiso, H. J. Zwally, et al. D. J. Cavalieri, P. Gloersen, and W. J. Campbell. 1987. "Arctic Sea Ice, 1973-1976: Satellite Passive-Microwave Observations." NASA SP-489. 296 pp.

    Parkinson, C. L., J. C. Comiso, H. J. Zwally, et al. D. J. Cavalieri, P. Gloersen, and W. J. Campbell. 1987. "Seasonal and regional variations of Northern Hemisphere sea ice as illustrated with satellite passive-microwave data for 1974." Annals of Glaciology 9 119-126.

    Zwally, H. J., J. C. Comiso, C. L. Parkinson, et al. W. J. Campbell, F. D. Carsey, and P. Gloersen. 1983. "Antarctic Sea Ice, 1973-1976: Satellite Passive-Microwave Observations." NASA SP-459. 206 pp.

    Zwally, H. J., C. L. Parkinson, and J. C. Comiso. 1983. "Variability of Antarctic sea ice and changes in carbon dioxide." Science 220 (4601): 1005-1012.

    Non-Refereed

    Sun, X., J. F. Cavanaugh, J. C. SMith, et al. J. B. Abshire, J. L. Mcgarry, G. A. Neumann, D. J. Harding, H. J. Zwally, D. E. Smith, and M. T. Zuber. 2012. "SPACE LIDARS DEVELOPED AT NASA GSFC." IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (JSTARS) (Submitted)

                                                                                                                                                                                            
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