Sarith Prasad Mahanama

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Sarith Prasad Mahanama

  • SCIENTIST
  • 301.614.5667
  • NASA/GSFC
  • Mail Code: 610.1
  • Greenbelt , MD 20771
  • Employer: SCIENCE SYSTEMS AND APPLICATIONS INC
  • Brief Bio

    Dr. Mahanama conducts research on the role of the land surface in the climate system; applications of land-surface models to study the impact of land surface variability on the predictability of climate and interactions between the terrestrial and atmospheric branches of the hydrologic cycle. He is responsible for the land surface boundary of the GEOS-5 climate modeling system.

    Positions/Employment

    2/2012 - Present

    Senior Research Scientist

    Science Systems and Applications Incorporated (SSAI), NASA Goddard Space Flight Center, Greenbelt, MD 20778
    8/2010 - 1/2012

    Research Scientist/Senior Scientific Programmer

    Science Applications International Corporation (SAIC), NASA Goddard Space Flight Center, Greenbelt, MD 20778
    10/2000 - 7/2010

    Associate Research Scientist/Assistant Research Scientist/Research Associate

    Goddard Earth Sciences and Technology Center, University of Maryland-Baltimore County, NASA Goddard Space Flight Center, Greenbelt, MD 20778.
    5/2000 - 9/2000

    Postdoctoral Research Associate

    University Space Research Association, NASA Goddard Space Flight Center, Greenbelt, MD 20778.

    Education

    Ph.D., 2000 in Civil and Environmental Engineering
    The University of Hong Kong, Hong Kong.


    B.Sc.Eng., 1993 (Honors) in Civil Engineering
    University of Peradeniya, Sri Lanka.

    Professional Service

    Reviewer for the Journal of Climate, Journal of Hydrometeorology, Journal of Applied Meteorology, Global & Planetary Change, Journal of Hydro-Environment Research, Geophysical Research Letters, Theoretical and Applied Climatology, Hydrology and Earth System Sciences, IEEE Transactions on Geoscience and Remote Sensing, Journal of Plant Ecology, JGR-Atmosphere, Nature Geoscience, Atmosphere-Ocean, Water Resources Research, Journal of Hydrologic Engineering, Journal and Applied Meteorology and Climatology, Hydrological Sciences Journal, Climate Change, Water Resources Research, Climate Dynamics, Atmospheric and Oceanic Technology, Journal of Hydrology

    Reviewer (proposals) for the NOAA CPPA Program, National Science Foundation, NASA Earth and Space Science Fellowship, Canadian Foundation of Climate and Atmospheric Sciences.

    Awards

    2015 NASA GMAO Peer Award for Outstanding Science Support
    2006 NASA GMAO Outstanding Performance Award
     

    Publications

    Refereed

    Girotto, M., R. H. Reichle, M. Rodell, et al. Q. Liu, S. Mahanama, and G. J. De Lannoy. 2019. "Multi-sensor assimilation of SMOS brightness temperature and GRACE terrestrial water storage observations for soil moisture and shallow groundwater estimation." Remote Sensing of Environment, 227: 12-27 [10.1016/j.rse.2019.04.001]

    Duong, T. M., R. Ranasinghe, M. Thatcher, et al. S. Mahanama, Z. B. Wang, P. K. Dissanayake, M. Hemer, A. Luijendijk, J. Bamunawala, D. Roelvink, and D. Walstra. 2018. "Assessing climate change impacts on the stability of small tidal inlets: Part 2 - Data rich environments." Marine Geology, 395: 65-81 [10.1016/j.margeo.2017.09.007]

    Dirmeyer, P. A., L. Chen, J. Wu, et al. C.-S. Shin, B. Huang, B. A. Cash, M. G. Bosilovich, S. Mahanama, R. D. Koster, J. A. Santanello, M. B. Ek, G. Balsamo, E. Dutra, and D. M. Lawrence. 2018. "Verification of Land–Atmosphere Coupling in Forecast Models, Reanalyses, and Land Surface Models Using Flux Site Observations." Journal of Hydrometeorology, 19 (2): 375-392 [10.1175/jhm-d-17-0152.1]

    Koster, R. D., Q. Liu, S. P. Mahanama, and R. H. Reichle. 2018. "Improved Hydrological Simulation Using SMAP Data: Relative Impacts of Model Calibration and Data Assimilation." Journal of Hydrometeorology, 19 (4): 727-741 [10.1175/jhm-d-17-0228.1]

    Koster, R. D., W. T. Crow, R. H. Reichle, and S. P. Mahanama. 2018. "Estimating Basin-Scale Water Budgets With SMAP Soil Moisture Data." Water Resources Research, 54 (7): 4228-4244 [10.1029/2018wr022669]

    Reichle, R. H., Q. Liu, R. D. Koster, et al. C. S. Draper, S. P. Mahanama, and G. S. Partyka. 2017. "Land Surface Precipitation in MERRA-2." Journal of Climate, 30 (5): 1643-1664 [10.1175/jcli-d-16-0570.1]

    Koster, R. D., R. H. Reichle, and S. P. Mahanama. 2017. "A Data-Driven Approach for Daily Real-Time Estimates and Forecasts of Near-Surface Soil Moisture." Journal of Hydrometeorology, 18 (3): 837-843 [10.1175/jhm-d-16-0285.1]

    Reichle, R. H., C. S. Draper, Q. Liu, et al. M. Girotto, S. P. Mahanama, R. D. Koster, and G. J. De Lannoy. 2017. "Assessment of MERRA-2 Land Surface Hydrology Estimates." Journal of Climate, 30 (8): 2937-2960 [10.1175/jcli-d-16-0720.1]

    Reichle, R. H., G. J. De Lannoy, Q. Liu, et al. J. V. Ardizzone, A. Colliander, A. Conaty, W. Crow, T. J. Jackson, L. A. Jones, J. S. Kimball, R. D. Koster, S. P. Mahanama, E. B. Smith, A. Berg, S. Bircher, D. Bosch, T. G. Caldwell, M. Cosh, C. D. Holifield Collins, K. H. Jensen, S. Livingston, E. Lopez-Baeza, J. Martínez-Fernández, H. McNairn, M. Moghaddam, A. Pacheco, T. Pellarin, J. Prueger, T. Rowlandson, M. Seyfried, P. Starks, Z. Su, M. Thibeault, R. van der Velde, J. Walker, X. Wu, and Y. Zeng. 2017. "Assessment of the SMAP Level-4 Surface and Root-Zone Soil Moisture Product Using In Situ Measurements." Journal of Hydrometeorology, 18 (10): 2621-2645 [10.1175/jhm-d-17-0063.1]

    Yasunari, T. J., P. R. Colarco, W. K. Lau, et al. K. Osada, M. Kido, S. P. Mahanama, K.-M. Kim, and A. M. Da Silva. 2016. "Total dust deposition flux during precipitation in Toyama, Japan, in the spring of 2009: A sensitivity analysis with the NASA GEOS-5 Model." Atmospheric Research, 167: 298–313 [10.1016/j.atmosres.2015.08.005]

    Boone, A. A., Y. Xue, F. De Sales, et al. R. E. Comer, S. Hagos, S. Mahanama, K. Schiro, G. Song, G. Wang, S. Li, and C. R. Mechoso. 2016. "The regional impact of Land-Use Land-cover Change (LULCC) over West Africa from an ensemble of global climate models under the auspices of the WAMME2 project." Climate Dynamics, [10.1007/s00382-016-3252-y]

    Xue, Y., F. D. Sales, W. K. Lau, et al. A. Boone, K.-M. Kim, G. Wang, F. Kucharski, K. Schiro, M. Hosaka, S. Li, C. R. Mechoso, L. M. Druyan, I. S. Sanda, W. Thiaw, N. Zeng, R. E. Comer, Y.-K. Lim, S. Mahanama, G. Song, Y. Gu, M. Chin, P. Dirmeyer, S. M. Hagos, E. Kalnay, A. Kitoh, L. R. Leung, C.-H. Lu, N. M. Mahowald, S. D. Schubert, and Z. Zhang. 2016. "West African monsoon decadal variability and drought and surface-related forcings: Second West African monsoon modeling and evaluation project experiment (WAMME II)." Climate Dynamics, 47 (11): 3517-3545 [10.1007/s00382-016-3224-2]

    De Lannoy, G. J., R. Koster, R. H. Reichle, S. Mahanama, and Q. Liu. 2014. "An updated treatment of soil texture and associated hydraulic properties in a global land modeling system." J. Adv. Model. Earth Sys, 6: 957-979 [10.1002/2014MS000330]

    Koster, R. D., G. K. Walker, S. P. Mahanama, and R. H. Reichle. 2014. "Soil Moisture Initialization Error and Subgrid Variability of Precipitation in Seasonal Streamflow Forecasting." J. Hydrometeor., 15 (1): 69-88 [10.1175/JHM-D-13-050.1]

    Yasunari, T., W. K. Lau, P. R. Colarco, et al. A. M. Da Silva, T. Aoki, K. Aoki, N. Murao, S. Yamagata, Y. Kodama, and S. P. Mahanama. 2014. "The GOddard SnoW Impurity Module (GOSWIM) for the NASA GEOS-5 Earth System Model: Preliminary Comparisons with Observations in Sapporo, Japan." SOLA, 10 (0): 50-56 [10.2151/sola.2014-011]

    Koster, R. D., and S. P. Mahanama. 2012. "Land Surface Controls on Hydroclimatic Means and Variability." Journal of Hydrometeorology, 13 (5): 1604-1620 [10.1175/JHM-D-12-050.1]

    Mahanama, S., B. Livneh, R. D. Koster, D. Lettenmaier, and R. H. Reichle. 2012. "Soil Moisture, Snow, and Seasonal Streamflow Forecasts in the United States." Journal of Hydrometeorology, 13 (1): 189-203 [10.1175/JHM-D-11-046.1]

    Koster, R. D., S. P. Mahanama, T. J. Yamada, et al. G. Balsamo, A. A. Berg, M. Boisserie, P. A. Dirmeyer, F. J. Doblas-Reyes, G. Drewitt, C. T. Gordon, Z. Guo, J. H. Jeong, W. S. Lee, Z. Li, L. Luo, S. Malyshev, W. J. Merryfield, S. I. Seneviratne, T. Stanelle, B. J. van den Hurk, F. Vitart, and W. F. Wood. 2011. "The Second Phase of the Global Land-Atmosphere Coupling Experiment: Soil Moisture Contributions to Subseasonal Forecast Skill." Journal of Hydrometeorology, 12: 805-822 [DOI: 10.1175/2011JHM1365.1]

    Reichle, R. H., R. D. Koster, G. J. De Lannoy, et al. B. A. Forman, Q. Liu, S. P. Mahanama, and A. Toure. 2011. "Assessment and Enhancement of MERRA Land Surface Hydrology Estimates." Journal of Climate, 24 (24): 6322-6338 [10.1175/JCLI-D-10-05033.1]

    Menon, S., H. Akbari, S. Mahanama, I. Sednev, and R. Levinson. 2010. "Radiative forcing and temperature response to changes in urban albedos and associated CO₂ offsets." Environ. Res. Lett., 5 (1): 014005 [10.1088/1748-9326/5/1/014005]

    Koster, R. D., S. P. Mahanama, T. J. Yamada, et al. G. Balsamo, A. A. Berg, M. Boisserie, P. A. Dirmeyer, F. J. Doblas-Reyes, G. Drewitt, C. T. Gordon, Z. Guo, J. H. Jeong, D. M. Lawrence, W. S. Lee, Z. Li, L. Luo, S. Malyshev, W. J. Merryfield, S. I. Seneviratne, T. Stanelle, B. J. van den Hurk, F. Vitart, and W. F. Wood. 2010. "Contribution of land surface initialization to subseasonal forecast skill: First results from a multi-model experiment." Geophysical Research Letters, 37: 0-0 [DOI: 10.1029/2009GL041677]

    Reichle, R. H., S. V. Kumar, S. P. Mahanama, R. D. Koster, and Q. Liu. 2010. "Assimilation of Satellite-Derived Skin Temperature Observations into Land Surface Models." J. Hydrometeor, 11 (5): 1103-1122 [10.1175/2010JHM1262.1]

    Koster, R. D., S. P. Mahanama, B. Livneh, B. P. Letternmaier, and R. H. Reichle. 2010. "Skill in streamflow forecasts derived from large-scale estimates of soil moisture and snow." Nature Geoscience, 3 (9): 613-616 [10.1038/NGEO944]

    Wang, A., T. J. Bohn, S. P. Mahanama, D. Lettenmaier, and R. D. Koster. 2009. "Multimodel Ensemble Reconstruction of Drought over the Continental United States." Journal of Climate, 22: 2694-2712 [DOI: 10.1175/2008JCLI2586.1]

    Koster, R. D., H. Wang, S. D. Schubert, M. J. Suarez, and S. P. Mahanama. 2009. "Drought-Induced Warming in the Continental United States under Different SST Regimes." Journal of Climate, 22: 5385-5400 [DOI: 10.1175/2009JCLI3075.1]

    Reichle, R. H., W. T. Crow, R. D. Koster, H. O. Sharif, and S. P. Mahanama. 2008. "Contribution of soil moisture retrievals to land data assimilation products." Geophysical Research Letters, 35 (1): L01404 [10.1029/2007GL031986]

    Mahanama, S. P., R. D. Koster, R. H. Reichle, and M. J. Suarez. 2008. "Impact of Subsurface Temperature Variability on Surface Air Temperature Variability: An AGCM Study." J. Hydrometeor., 9 (4): 804-815 [10.1175/2008JHM949.1]

    Mahanama, S. P., R. D. Koster, R. H. Reichle, and L. Zubair. 2008. "The role of soil moisture initialization in subseasonal and seasonal streamflow prediction – A case study in Sri Lanka." Advances in Water Resources, 31 (10): 1333-1343 [10.1016/j.advwatres.2008.06.004]

    Reichle, R. H., R. D. Koster, P. Liu, et al. S. P. Mahanama, E. G. Njoku, and M. Owe. 2007. "Comparison and assimilation of global soil moisture retrievals from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) and the Scanning Multichannel Microwave Radiometer (SMMR)." J. Geophys. Res., 112 (D9): D09108 [10.1029/2006JD008033]

    Reichle, R. H., R. D. Koster, P. Liu, et al. S. Mahanama, E. Njoku, and M. Owe. 2007. "Comparison and assimilation of global soil moisture retrievals from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) and the Scanning Multichannel Microwave Radiometer (SMMR)." J Geophys Res, 112 (D09108): 14 pp [10.1029/2006JD008033]

    Mahanama, S. P., and R. D. Koster. 2005. "AGCM biases in evaporation regime: Impacts on soil moisture memory and land-atmosphere feedback." Journal of Hydrometeorology, 6: 656-669 [DOI: 10.1175/JHM446.1]

    Boone, A., F. Habets, J. Noilhan, et al. D. Clark, P. Dirmeyer, S. Fox, Y. Gusev, I. Haddeland, R. D. Koster, D. Lohmann, S. P. Mahanama, K. Mitchell, O. Nasonova, G. Y. Niu, A. J. Pitman, J. Polcher, A. B. Shmakin, K. Tanaka, B. van den Hurk, S. Verant, D. Verseghy, P. Viterbo, and Z. L. Yang. 2004. "The Rhone-aggregation land surface scheme intercomparison project: An overview." Journal of Climate, 17: 187-208 [Full Text (Link)] [DOI: 10.1175/1520-0442(2004)017<0187:TRLSSI>2.0.CO]

    Mahanama, S. P., and R. D. Koster. 2003. "Intercomparison of Soil Moisture Memory in Two Land Surface Models." J. Hydrometeor, 4 (6): 1134-1146 [10.1175/1525-7541(2003)004<1134:IOSMMI>2.0.CO;2]

    Bowling, L. C., D. P. Lettenmaier, B. Nijssen, et al. L. P. Graham, D. B. Clark, M. E. Maayar, R. Essery, S. Goers, Y. M. Gusev, F. Haberts, B. V. Hurk, J. Jin, D. Kahan, D. Lohmann, X. Ma, S. Mahanama, D. M. Mocko, O. Nasonova, G.-Y. Niu, P. Samuelsson, A. B. Shmakin, K. Takata, D. Verseghy, R. Viterbo, Y. Xia, Y. Xue, and Z.-L. Yang. 2003. "Simulation of high-latitude hydrological processes in the Torne-Kalix basin: PILPS Phase 2(e): 1: Experiment description and summary intercomparisons." Global and Planetary Change, 38 (1-2): 1-30 [10.1016/S0921-8181(03)00003-1]

    Nijssen, B., L. C. Bowling, D. P. Lettenmaier, et al. D. B. Clark, M. E. Maayar, R. Essery, S. Goers, Y. M. Gusev, F. Haberts, B. V. Hurk, J. Jin, D. Kahan, D. Lohmann, X. Ma, S. Mahanama, D. M. Mocko, O. Nasonova, G.-Y. Niu, P. Samuelsson, A. B. Shmakin, K. Takata, D. Verseghy, R. Viterbo, Y. Xia, Y. Xue, and Z.-L. Yang. 2003. "Simulation of high-latitude hydrological processes in the Torne-Kalix basin: PILPS Phase 2(e): 2: Comparison of model results with observations." Global and Planetary Change, 38 (1-2): 31-53 [10.1016/S0921-8181(03)00004-3]

    Guillevic, P., R. D. Koster, M. J. Suarez, et al. L. Bounoua, G. J. Collatz, S. O. Los, and S. P. Mahanama. 2002. "Influence of the inter annual variability of vegetation on the surface energy balance - a global sensitivity study." Journal of Hydrometeorology, 3 (6): 617-629.

    Non-Refereed

    Collow, A., S. P. Mahanama, M. G. Bosilovich, R. D. Koster, and S. D. Schubert. 2017. "An Evaluation of Teleconnections Over the United States in an Ensemble of AMIP Simulations with the MERRA-2 Configuration of the GEOS Atmospheric Model." NASA Technical Report Series on Global Modeling and Data Assimilation, NASA/TM-2016-104606 47: 68.

    Mahanama, S. P., R. D. Koster, G. K. Walker, et al. L. L. Takacs, R. H. Reichle, G. J. De Lannoy, Q. Liu, B. Zhao, and M. J. Suarez. 2015. "Land Boundary Conditions for the Goddard Earth Observing System Model Version 5 (GEOS-5) Climate Modeling System - Recent Updates and Data File Descriptions." NASA/TM–2015-104606 39: 55.

    Brief Bio

    Dr. Mahanama conducts research on the role of the land surface in the climate system; applications of land-surface models to study the impact of land surface variability on the predictability of climate and interactions between the terrestrial and atmospheric branches of the hydrologic cycle. He is responsible for the land surface boundary of the GEOS-5 climate modeling system.

    Publications

    Refereed

    Girotto, M., R. H. Reichle, M. Rodell, et al. Q. Liu, S. Mahanama, and G. J. De Lannoy. 2019. "Multi-sensor assimilation of SMOS brightness temperature and GRACE terrestrial water storage observations for soil moisture and shallow groundwater estimation." Remote Sensing of Environment 227 12-27 [10.1016/j.rse.2019.04.001]

    Duong, T. M., R. Ranasinghe, M. Thatcher, et al. S. Mahanama, Z. B. Wang, P. K. Dissanayake, M. Hemer, A. Luijendijk, J. Bamunawala, D. Roelvink, and D. Walstra. 2018. "Assessing climate change impacts on the stability of small tidal inlets: Part 2 - Data rich environments." Marine Geology 395 65-81 [10.1016/j.margeo.2017.09.007]

    Dirmeyer, P. A., L. Chen, J. Wu, et al. C.-S. Shin, B. Huang, B. A. Cash, M. G. Bosilovich, S. Mahanama, R. D. Koster, J. A. Santanello, M. B. Ek, G. Balsamo, E. Dutra, and D. M. Lawrence. 2018. "Verification of Land–Atmosphere Coupling in Forecast Models, Reanalyses, and Land Surface Models Using Flux Site Observations." Journal of Hydrometeorology 19 (2): 375-392 [10.1175/jhm-d-17-0152.1]

    Koster, R. D., Q. Liu, S. P. Mahanama, and R. H. Reichle. 2018. "Improved Hydrological Simulation Using SMAP Data: Relative Impacts of Model Calibration and Data Assimilation." Journal of Hydrometeorology 19 (4): 727-741 [10.1175/jhm-d-17-0228.1]

    Koster, R. D., W. T. Crow, R. H. Reichle, and S. P. Mahanama. 2018. "Estimating Basin-Scale Water Budgets With SMAP Soil Moisture Data." Water Resources Research 54 (7): 4228-4244 [10.1029/2018wr022669]

    Reichle, R. H., Q. Liu, R. D. Koster, et al. C. S. Draper, S. P. Mahanama, and G. S. Partyka. 2017. "Land Surface Precipitation in MERRA-2." Journal of Climate 30 (5): 1643-1664 [10.1175/jcli-d-16-0570.1]

    Koster, R. D., R. H. Reichle, and S. P. Mahanama. 2017. "A Data-Driven Approach for Daily Real-Time Estimates and Forecasts of Near-Surface Soil Moisture." Journal of Hydrometeorology 18 (3): 837-843 [10.1175/jhm-d-16-0285.1]

    Reichle, R. H., C. S. Draper, Q. Liu, et al. M. Girotto, S. P. Mahanama, R. D. Koster, and G. J. De Lannoy. 2017. "Assessment of MERRA-2 Land Surface Hydrology Estimates." Journal of Climate 30 (8): 2937-2960 [10.1175/jcli-d-16-0720.1]

    Reichle, R. H., G. J. De Lannoy, Q. Liu, et al. J. V. Ardizzone, A. Colliander, A. Conaty, W. Crow, T. J. Jackson, L. A. Jones, J. S. Kimball, R. D. Koster, S. P. Mahanama, E. B. Smith, A. Berg, S. Bircher, D. Bosch, T. G. Caldwell, M. Cosh, C. D. Holifield Collins, K. H. Jensen, S. Livingston, E. Lopez-Baeza, J. Martínez-Fernández, H. McNairn, M. Moghaddam, A. Pacheco, T. Pellarin, J. Prueger, T. Rowlandson, M. Seyfried, P. Starks, Z. Su, M. Thibeault, R. van der Velde, J. Walker, X. Wu, and Y. Zeng. 2017. "Assessment of the SMAP Level-4 Surface and Root-Zone Soil Moisture Product Using In Situ Measurements." Journal of Hydrometeorology 18 (10): 2621-2645 [10.1175/jhm-d-17-0063.1]

    Yasunari, T. J., P. R. Colarco, W. K. Lau, et al. K. Osada, M. Kido, S. P. Mahanama, K.-M. Kim, and A. M. Da Silva. 2016. "Total dust deposition flux during precipitation in Toyama, Japan, in the spring of 2009: A sensitivity analysis with the NASA GEOS-5 Model." Atmospheric Research 167 298–313 [10.1016/j.atmosres.2015.08.005]

    Boone, A. A., Y. Xue, F. De Sales, et al. R. E. Comer, S. Hagos, S. Mahanama, K. Schiro, G. Song, G. Wang, S. Li, and C. R. Mechoso. 2016. "The regional impact of Land-Use Land-cover Change (LULCC) over West Africa from an ensemble of global climate models under the auspices of the WAMME2 project." Climate Dynamics [10.1007/s00382-016-3252-y]

    Xue, Y., F. D. Sales, W. K. Lau, et al. A. Boone, K.-M. Kim, G. Wang, F. Kucharski, K. Schiro, M. Hosaka, S. Li, C. R. Mechoso, L. M. Druyan, I. S. Sanda, W. Thiaw, N. Zeng, R. E. Comer, Y.-K. Lim, S. Mahanama, G. Song, Y. Gu, M. Chin, P. Dirmeyer, S. M. Hagos, E. Kalnay, A. Kitoh, L. R. Leung, C.-H. Lu, N. M. Mahowald, S. D. Schubert, and Z. Zhang. 2016. "West African monsoon decadal variability and drought and surface-related forcings: Second West African monsoon modeling and evaluation project experiment (WAMME II)." Climate Dynamics 47 (11): 3517-3545 [10.1007/s00382-016-3224-2]

    De Lannoy, G. J., R. Koster, R. H. Reichle, S. Mahanama, and Q. Liu. 2014. "An updated treatment of soil texture and associated hydraulic properties in a global land modeling system." J. Adv. Model. Earth Sys 6 957-979 [10.1002/2014MS000330]

    Koster, R. D., G. K. Walker, S. P. Mahanama, and R. H. Reichle. 2014. "Soil Moisture Initialization Error and Subgrid Variability of Precipitation in Seasonal Streamflow Forecasting." J. Hydrometeor. 15 (1): 69-88 [10.1175/JHM-D-13-050.1]

    Yasunari, T., W. K. Lau, P. R. Colarco, et al. A. M. Da Silva, T. Aoki, K. Aoki, N. Murao, S. Yamagata, Y. Kodama, and S. P. Mahanama. 2014. "The GOddard SnoW Impurity Module (GOSWIM) for the NASA GEOS-5 Earth System Model: Preliminary Comparisons with Observations in Sapporo, Japan." SOLA 10 (0): 50-56 [10.2151/sola.2014-011]

    Koster, R. D., and S. P. Mahanama. 2012. "Land Surface Controls on Hydroclimatic Means and Variability." Journal of Hydrometeorology 13 (5): 1604-1620 [10.1175/JHM-D-12-050.1]

    Mahanama, S., B. Livneh, R. D. Koster, D. Lettenmaier, and R. H. Reichle. 2012. "Soil Moisture, Snow, and Seasonal Streamflow Forecasts in the United States." Journal of Hydrometeorology 13 (1): 189-203 [10.1175/JHM-D-11-046.1]

    Koster, R. D., S. P. Mahanama, T. J. Yamada, et al. G. Balsamo, A. A. Berg, M. Boisserie, P. A. Dirmeyer, F. J. Doblas-Reyes, G. Drewitt, C. T. Gordon, Z. Guo, J. H. Jeong, W. S. Lee, Z. Li, L. Luo, S. Malyshev, W. J. Merryfield, S. I. Seneviratne, T. Stanelle, B. J. van den Hurk, F. Vitart, and W. F. Wood. 2011. "The Second Phase of the Global Land-Atmosphere Coupling Experiment: Soil Moisture Contributions to Subseasonal Forecast Skill." Journal of Hydrometeorology 12 805-822 [DOI: 10.1175/2011JHM1365.1]

    Reichle, R. H., R. D. Koster, G. J. De Lannoy, et al. B. A. Forman, Q. Liu, S. P. Mahanama, and A. Toure. 2011. "Assessment and Enhancement of MERRA Land Surface Hydrology Estimates." Journal of Climate 24 (24): 6322-6338 [10.1175/JCLI-D-10-05033.1]

    Menon, S., H. Akbari, S. Mahanama, I. Sednev, and R. Levinson. 2010. "Radiative forcing and temperature response to changes in urban albedos and associated CO₂ offsets." Environ. Res. Lett. 5 (1): 014005 [10.1088/1748-9326/5/1/014005]

    Koster, R. D., S. P. Mahanama, T. J. Yamada, et al. G. Balsamo, A. A. Berg, M. Boisserie, P. A. Dirmeyer, F. J. Doblas-Reyes, G. Drewitt, C. T. Gordon, Z. Guo, J. H. Jeong, D. M. Lawrence, W. S. Lee, Z. Li, L. Luo, S. Malyshev, W. J. Merryfield, S. I. Seneviratne, T. Stanelle, B. J. van den Hurk, F. Vitart, and W. F. Wood. 2010. "Contribution of land surface initialization to subseasonal forecast skill: First results from a multi-model experiment." Geophysical Research Letters 37 0-0 [DOI: 10.1029/2009GL041677]

    Reichle, R. H., S. V. Kumar, S. P. Mahanama, R. D. Koster, and Q. Liu. 2010. "Assimilation of Satellite-Derived Skin Temperature Observations into Land Surface Models." J. Hydrometeor 11 (5): 1103-1122 [10.1175/2010JHM1262.1]

    Koster, R. D., S. P. Mahanama, B. Livneh, B. P. Letternmaier, and R. H. Reichle. 2010. "Skill in streamflow forecasts derived from large-scale estimates of soil moisture and snow." Nature Geoscience 3 (9): 613-616 [10.1038/NGEO944]

    Wang, A., T. J. Bohn, S. P. Mahanama, D. Lettenmaier, and R. D. Koster. 2009. "Multimodel Ensemble Reconstruction of Drought over the Continental United States." Journal of Climate 22 2694-2712 [DOI: 10.1175/2008JCLI2586.1]

    Koster, R. D., H. Wang, S. D. Schubert, M. J. Suarez, and S. P. Mahanama. 2009. "Drought-Induced Warming in the Continental United States under Different SST Regimes." Journal of Climate 22 5385-5400 [DOI: 10.1175/2009JCLI3075.1]

    Reichle, R. H., W. T. Crow, R. D. Koster, H. O. Sharif, and S. P. Mahanama. 2008. "Contribution of soil moisture retrievals to land data assimilation products." Geophysical Research Letters 35 (1): L01404 [10.1029/2007GL031986]

    Mahanama, S. P., R. D. Koster, R. H. Reichle, and M. J. Suarez. 2008. "Impact of Subsurface Temperature Variability on Surface Air Temperature Variability: An AGCM Study." J. Hydrometeor. 9 (4): 804-815 [10.1175/2008JHM949.1]

    Mahanama, S. P., R. D. Koster, R. H. Reichle, and L. Zubair. 2008. "The role of soil moisture initialization in subseasonal and seasonal streamflow prediction – A case study in Sri Lanka." Advances in Water Resources 31 (10): 1333-1343 [10.1016/j.advwatres.2008.06.004]

    Reichle, R. H., R. D. Koster, P. Liu, et al. S. P. Mahanama, E. G. Njoku, and M. Owe. 2007. "Comparison and assimilation of global soil moisture retrievals from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) and the Scanning Multichannel Microwave Radiometer (SMMR)." J. Geophys. Res. 112 (D9): D09108 [10.1029/2006JD008033]

    Reichle, R. H., R. D. Koster, P. Liu, et al. S. Mahanama, E. Njoku, and M. Owe. 2007. "Comparison and assimilation of global soil moisture retrievals from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) and the Scanning Multichannel Microwave Radiometer (SMMR)." J Geophys Res 112 (D09108): 14 pp [10.1029/2006JD008033]

    Mahanama, S. P., and R. D. Koster. 2005. "AGCM biases in evaporation regime: Impacts on soil moisture memory and land-atmosphere feedback." Journal of Hydrometeorology 6 656-669 [DOI: 10.1175/JHM446.1]

    Boone, A., F. Habets, J. Noilhan, et al. D. Clark, P. Dirmeyer, S. Fox, Y. Gusev, I. Haddeland, R. D. Koster, D. Lohmann, S. P. Mahanama, K. Mitchell, O. Nasonova, G. Y. Niu, A. J. Pitman, J. Polcher, A. B. Shmakin, K. Tanaka, B. van den Hurk, S. Verant, D. Verseghy, P. Viterbo, and Z. L. Yang. 2004. "The Rhone-aggregation land surface scheme intercomparison project: An overview." Journal of Climate 17 187-208 [Full Text (Link)] [DOI: 10.1175/1520-0442(2004)017<0187:TRLSSI>2.0.CO]

    Mahanama, S. P., and R. D. Koster. 2003. "Intercomparison of Soil Moisture Memory in Two Land Surface Models." J. Hydrometeor 4 (6): 1134-1146 [10.1175/1525-7541(2003)004<1134:IOSMMI>2.0.CO;2]

    Bowling, L. C., D. P. Lettenmaier, B. Nijssen, et al. L. P. Graham, D. B. Clark, M. E. Maayar, R. Essery, S. Goers, Y. M. Gusev, F. Haberts, B. V. Hurk, J. Jin, D. Kahan, D. Lohmann, X. Ma, S. Mahanama, D. M. Mocko, O. Nasonova, G.-Y. Niu, P. Samuelsson, A. B. Shmakin, K. Takata, D. Verseghy, R. Viterbo, Y. Xia, Y. Xue, and Z.-L. Yang. 2003. "Simulation of high-latitude hydrological processes in the Torne-Kalix basin: PILPS Phase 2(e): 1: Experiment description and summary intercomparisons." Global and Planetary Change 38 (1-2): 1-30 [10.1016/S0921-8181(03)00003-1]

    Nijssen, B., L. C. Bowling, D. P. Lettenmaier, et al. D. B. Clark, M. E. Maayar, R. Essery, S. Goers, Y. M. Gusev, F. Haberts, B. V. Hurk, J. Jin, D. Kahan, D. Lohmann, X. Ma, S. Mahanama, D. M. Mocko, O. Nasonova, G.-Y. Niu, P. Samuelsson, A. B. Shmakin, K. Takata, D. Verseghy, R. Viterbo, Y. Xia, Y. Xue, and Z.-L. Yang. 2003. "Simulation of high-latitude hydrological processes in the Torne-Kalix basin: PILPS Phase 2(e): 2: Comparison of model results with observations." Global and Planetary Change 38 (1-2): 31-53 [10.1016/S0921-8181(03)00004-3]

    Guillevic, P., R. D. Koster, M. J. Suarez, et al. L. Bounoua, G. J. Collatz, S. O. Los, and S. P. Mahanama. 2002. "Influence of the inter annual variability of vegetation on the surface energy balance - a global sensitivity study." Journal of Hydrometeorology 3 (6): 617-629

    Non-Refereed

    Collow, A., S. P. Mahanama, M. G. Bosilovich, R. D. Koster, and S. D. Schubert. 2017. "An Evaluation of Teleconnections Over the United States in an Ensemble of AMIP Simulations with the MERRA-2 Configuration of the GEOS Atmospheric Model." NASA Technical Report Series on Global Modeling and Data Assimilation, NASA/TM-2016-104606 47 68

    Mahanama, S. P., R. D. Koster, G. K. Walker, et al. L. L. Takacs, R. H. Reichle, G. J. De Lannoy, Q. Liu, B. Zhao, and M. J. Suarez. 2015. "Land Boundary Conditions for the Goddard Earth Observing System Model Version 5 (GEOS-5) Climate Modeling System - Recent Updates and Data File Descriptions." NASA/TM–2015-104606 39 55

                                                                                                                                                                                            
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