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Atmospheric Science & Global Change

Staff information


Ghassem R. Asrar

Atmospheric Sciences & Global Change


Dr. Ghassem R. Asrar is the Director of the Joint Global Change Research Institute of the Pacific Northwest National Laboratory located at the University of Maryland, College Park, Maryland. Prior to this position, he served as the Director of World Climate Research Program (WCRP) in Geneva, Switzerland from 2008-2013, the Deputy Administrator for Natural Resources and Agricultural Systems with Agricultural Research Service (ARS), of the U.S. Department of Agriculture from 2006-2008, and he was with the U.S. National Aeronautics and Space Administration (NASA) from 1987-2005.

Dr. Asrar served as the chief scientist for the Earth Observing System in the Office of Earth Science at NASA Headquarters prior to being named as the Associate Administrator for Earth Science in 1998. While in his position of chief scientist, he led an international team developing the scientific priorities and measurements to be obtained from a series of advanced Earth-orbiting satellites that provided fundamental new insights into the connections between Earth's land, oceans, atmosphere, ice and life. He established and managed the NASA Earth System Science Interdisciplinary Research, Graduate Fellowship and New Investigators Programs to support training of the next generation of Earth scientists and engineers.

During his tenure as Associate Administrator for Earth Science, NASA program achieved successful launches of more than 20 Earth observing research and operational environmental satellites, and he guided the development of a comprehensive data and information system to manage record amount of unique information resulting from these satellites that served more than 2 million users each year.

Research Interests

  • Earth system science research and education
  • Multi-spectral remote sensing of Earth’s biosphere and atmosphere
  • Modeling mass, energy and radiation exchange between Earth’s surface and atmosphere
  • Renewable and bio-based energy, fuels and products

Education and Credentials

  • 1981 Michigan State University, East Lansing, MI, PhD, Environmental Physics
  • 1981 Michigan State University, East Lansing, MI, M.E., Civil Engineering
  • 1978 Michigan State University, East Lansing, MI, M.S., Soil Biophysics
  • 1976 Pahlavi University, Shiraz, Iran, B.S., Soil and Water Physics

Affiliations and Professional Service

  • Institute of Electronic and Electrical Engineering
  • American Geophysical Union
  • American Meteorological Society
  • Member of Editorial Board, Geomatics, Natural Hazards & Risks
  • Member of Editorial Board, Journal of Water
  • Chief Editor, Earth Perspective Open Access Journal

Awards and Recognitions

  • Scientific Achievement, American Institute of Aeronautic and Astronautics, 1989
  • NASA Group Achievement Awards, 1990, 1993
  • NASA Small Spacecraft Technology Initiative Award, 1994
  • NASA Exceptional Performance Award, 1997
  • NASA Exceptional Performance Award, 1997
  • Robert H. Goddard Memorial Lecture Series Medal, 1998
  • NASA Exceptional Service Medal, 1999
  • NASA Outstanding Leadership Medal, 2000
  • IEEE Fellow, 2000
  • American Meteorological Society Fellow, 2001
  • U.S. Presidential Distinguished Senior Executive Service Award, 2002
  • American Institute of Aeronautics and Astronautics, Space Systems Award 2006
  • Michigan State University, Outstanding and Distinguished Alumni Awards, 2007
  • American Geophysical Union, Fellow and Ambassador Award, 2014

PNNL Publications


  • Calvin K.V., P.L. Patel, L.E. Clarke, G.R. Asrar, B. Bond-Lamberty, R. Cui, and A. Di Vittorio, et al. 2019. "GCAM v5.1: Representing the linkages between energy, water, land, climate, and economic systems." Geoscientific Model Development 12, no. 2:677-698. PNNL-SA-137098. doi:10.5194/gmd-12-677-2019
  • Li X., Y. Zhou, L. Meng, G.R. Asrar, A. Sapkota, and F. Coates. 2019. "Characterizing the relationship between satellite phenology and pollen season: A case study of birch." Remote Sensing of Environment 222. PNNL-SA-140651. doi:10.1016/j.rse.2018.12.036
  • Yang Q., X. Zhang, J.E. Almendinger, M. Huang, G. Leng, Y. Zhou, and K. Zhao, et al. 2019. "Improving the SWAT forest module for enhancing water resource projections: A case study in the St. Croix River Basin." Hydrological Processes 33, no. 5:864-875. PNNL-SA-137109. doi:10.1002/hyp.13370


  • Garvin J.B., D.A. Slayback, V. Ferrini, J.J. Frawley, C. Giguere, G.R. Asrar, and K. Andersen. 2018. "Monitoring and Modelling the Rapid Evolution of Earth's Newest Volcanic Island: Hunga Tonga Hunga Ha'apai (Tonga) Using High Spatial Resolution Satellite Observations." Geophysical Research Letters 45, no. 8:3445-3452. PNNL-SA-131017. doi:10.1002/2017GL076621
  • Li X., Y. Zhou, G.R. Asrar, and Z. Zhu. 2018. "Creating a Seamless 1 km Resolution Daily Land Surface Temperature Dataset for Urban and Surrounding Areas in the Conterminous United States." Remote Sensing of Environment 206. PNNL-SA-126568. doi:10.1016/j.rse.2017.12.010
  • Li X., Y. Zhou, G.R. Asrar, and Z. Zhu. 2018. "Developing a 1 km resolution daily air temperature dataset for urban and surrounding areas in the conterminous United States." Remote Sensing of Environment 215. PNNL-SA-135525. doi:10.1016/j.rse.2018.05.034
  • Yang Q., J.E. Almendinger, X. Zhang, M. Huang, X. Chen, G. Leng, and Y. Zhou, et al. 2018. "Enhancing SWAT simulation of forest ecosystems for water resource assessment: A case study in the St. Croix River basin." Ecological Engineering 120. PNNL-SA-128496. doi:10.1016/j.ecoleng.2018.06.020
  • Zhou Y., X. Li, G.R. Asrar, S.J. Smith, and M. Imhoff. 2018. "A global record of annual urban dynamics (1992-2013) from nighttime lights." Remote Sensing of Environment 219. PNNL-SA-129683. doi:10.1016/j.rse.2018.10.015


  • Chang J., P. Ciais, X. Wang, S. Piao, G.R. Asrar, R. Betts, and F. Chevallier, et al. 2017. "Benchmarking carbon fluxes of the ISIMIP2a biome models." Environmental Research Letters 12, no. 4:Article No. 045002. PNNL-SA-125310. doi:10.1088/1748-9326/aa63fa
  • Chen M., R. Rafique, G.R. Asrar, B. Bond-Lamberty, P. Ciais, F. Zhao, and C. Reyer, et al. 2017. "Regional Contribution to Variability and Trends of Global Gross Primary Productivity." Environmental Research Letters 12, no. 10:105005. PNNL-SA-128641. doi:10.1088/1748-9326/aa8978
  • Le Page Y., D. Morton, C.A. Hartin, B. Bond-Lamberty, J.M. Pereira, G.C. Hurtt, and G.R. Asrar. 2017. "Synergy between land use and climate change increases future fire risk in Amazon forests." Earth System Dynamics 8, no. 4:1237-1246. PNNL-SA-119758. doi:10.5194/esd-8-1237-2017
  • Li X., Y. Zhou, G.R. Asrar, and L. Meng. 2017. "Characterizing spatiotemporal dynamics in phenology of urban ecosystems based on Landsat data." Science of the Total Environment 605-606. PNNL-SA-127386. doi:10.1016/j.scitotenv.2017.06.245
  • Li X., Y. Zhou, G.R. Asrar, J. Mao, X. Li, and W. Li. 2017. "Response of vegetation phenology to urbanization in the conterminous United States." Global Change Biology 23, no. 7:2818-2830. PNNL-SA-125468. doi:10.1111/gcb.13562
  • Li X., Y. Zhou, G.R. Asrar, M. Imhoff, and X. Li. 2017. "The surface urban heat island response to urban expansion: A panel analysis for the conterminous United States." Science of the Total Environment 605-606. PNNL-SA-126569. doi:10.1016/j.scitotenv.2017.06.229
  • Rafique R., J. Xia, O. Hararuk, G. Leng, G.R. Asrar, and Y. Luo. 2017. "Comparing the performance of three land models in global C cycle simulations: A detailed structural analysis." Land Degradation and Development 28, no. 2:524-533. PNNL-SA-116497. doi:10.1002/ldr.2506
  • Wolf J., G.R. Asrar, and T.O. West. 2017. "Revised Methane Emissions Factors and Spatially Distributed Annual Carbon Fluxes for Global Livestock." Carbon Balance and Management 12. PNNL-SA-126549. doi:10.1186/s13021-017-0084-y
  • Yang Q., X. Zhang, X. Xu, and G.R. Asrar. 2017. "An analysis of terrestrial and aquatic environmental controls of riverine dissolved organic carbon in the conterminous United States." Water 9, no. 6:383. PNNL-SA-115239. doi:10.3390/w9060383


  • Asrar G.R., R.H. Moss, and K. Jacobs. 2016. "Challenges and Opportunities in Earth-Human Systems Research." Eos 97. PNNL-SA-118445. doi:10.1029/2016EO050919
  • Ibrahim K., A. Shabudin, K.C. Koshy, and G.R. Asrar. 2016. "A new framework for integrated climate finance and inclusive responses to sustainable development in Malaysia." Geomatics, Natural Hazards and Risk 7, no. 6:1754-1768. PNNL-SA-119331. doi:10.1080/19475705.2016.1155503
  • Leng G., M. Huang, N. Voisin, X. Zhang, G.R. Asrar, and L.R. Leung. 2016. "Emergence of new hydrologic regimes of surface water resources in the Conterminous United States under future warming." Environmental Research Letters 11, no. 11:Article No. 114003. PNNL-SA-117644. doi:10.1088/1748-9326/11/11/114003
  • Leng G., X. Zhang, M. Huang, G.R. Asrar, and L. Leung. 2016. "The Role of Climate Covariability on Crop Yields in the Conterminous United States." Scientific Reports 6. PNNL-SA-116570. doi:10.1038/srep33160
  • Leng G., X. Zhang, M. Huang, Q. Yang, R. Rafique, G.R. Asrar, and L.R. Leung. 2016. "Simulating County-Level Crop Yields in the Conterminous United States Using the Community Land Model: the Effects of Optimizing Irrigation and Fertilization." Journal of Advances in Modeling Earth Systems 8, no. 4:1912–1931. PNNL-SA-116300. doi:10.1002/2016MS000645
  • Motesharrei S., J. Rivas, E. Kalnay, G.R. Asrar, A. Busalacchi, R.F. Cahalan, and M. Cane, et al. 2016. "Modeling sustainability: population, inequality, consumption, and bidirectional coupling of the Earth and Human Systems." National Science Review 3, no. 4:470–494. PNNL-SA-125484. doi:10.1093/nsr/nww081
  • Rafique R., F. Zhao, R. de Jong, N. Zeng, and G.R. Asrar. 2016. "Global and Regional Variability and Change in Terrestrial Ecosystems Net Primary Production and NDVI: A Model-Data Comparison." Remote Sensing 8, no. 3:177. PNNL-SA-115751. doi:10.3390/rs8030177
  • Simmons A., J. Fellous, V. Ramaswamy, K. Trenberth, G.R. Asrar, M.A. Balmaseda, and J.P. Burrows, et al. 2016. "Observation and integrated Earth-system science: A roadmap for 2016–2025." Advances in Space Research 57, no. 10:2037-2103. PNNL-SA-117266. doi:10.1016/j.asr.2016.03.008
  • Yang Q., X. Zhang, X. Xu, G.R. Asrar, R.A. Smith, J. Shih, and S. Duan. 2016. "Spatial patterns and environmental controls of particulate organic carbon in surface waters in the conterminous United States." Science of the Total Environment 554-555. PNNL-SA-114409. doi:10.1016/j.scitotenv.2016.02.164
  • Zhao F., N. Zeng, G.R. Asrar, P. Friedlingstein, I. Akihiko, A.K. Jain, and E. Kalnay, et al. 2016. "Role of CO2, climate and land use in regulating the seasonal amplitude increase of carbon fluxes in terrestrial ecosystems: a multimodel analysis." Biogeosciences 13, no. 17:5121-5137. PNNL-SA-118615. doi:10.5194/bg-2016-121


  • Fawcett A., G.C. Iyer, L.E. Clarke, J.A. Edmonds, N. Hultman, H.C. McJeon, and J. Rogelj, et al. 2015. "Can Paris pledges avert severe climate change?." Science 350, no. 6265:1168-1169. PNNL-ACT-SA-10111. doi:10.1126/science.aad5761
  • Iyer G.C., J.A. Edmonds, A.A. Fawcett, N. Hultman, J. Alsalam, G.R. Asrar, and K.V. Calvin, et al. 2015. "The contribution of Paris to limit global warming to 2 °C." Environmental Research Letters 10, no. 12:Article No. 125002. PNNL-SA-111720. doi:10.1088/1748-9326/10/12/125002
  • Jimenez Alonso W., B.J. McCormick, M.A. Miller, C. Schuck-Paim, and G.R. Asrar. 2015. "Beyond crystal balls: crosscutting solutions in global health to prepare for an unpredictable future." BMC Public Health 15. PNNL-SA-115313. doi:10.1186/s12889-015-2285-1
  • Rafique R., J. Xia, O. Hararuk, G.R. Asrar, Y. Wang, and Y. Luo. 2015. "Divergent predictions of carbon storage between two global land models: attribution of the causes through traceability analysis." Earth System Dynamics 6. PNNL-SA-115823. doi:10.5194/esdd-6-1579-2015
  • Rafique R., S. Kumar, Y. Luo, G. Kiely, and G.R. Asrar. 2015. "An algorithmic calibration approach to identify globally optimal parameters for constraining the DayCent model." Ecological Modelling 297. PNNL-SA-109385. doi:10.1016/j.ecolmodel.2014.11.022
  • Zhou Y., S.J. Smith, K. Zhao, M.L. Imhoff, A.M. Thomson, B. Bond-Lamberty, and G.R. Asrar, et al. 2015. "A global map of urban extent from nightlights." Environmental Research Letters 10, no. 5:Article No. 054011. PNNL-SA-107842. doi:10.1088/1748-9326/10/5/054011

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