Fanwei Zeng

Fanwei Zeng

  • Staff Research Scientist
  • 301.614.6563
  • NASA/GSFC
  • Mail Code: 610.1
  • Greenbelt , MD 20771
  • Employer: SCIENCE SYSTEMS AND APPLICATIONS INC
  • Brief Bio

    Dr. Fanwei Zeng is a contract research scientist working with Dr. Randy Koster in the Global Modeling and Assimilation Office (GMAO) at NASA/GSFC. She is responsible for the maintenance and further development of the carbon-nitrogen (CN) component of the Catchment-CN model, a merger of the carbon physics of Community Land Model version 4 (CLM4) dynamic vegetation model with the energy and water balance formulations of GMAO’s catchment land surface model.

    Prior to joining GMAO, Dr. Zeng worked with Dr. Jim Collatz in the Biospheric Sciences Laboratory at NASA/GSFC on estimating carbon exchange between biosphere and the atmosphere at a global scale using the Carnegie-Ames-Stanford Approach – Global Fire Emissions Database version 3 (CASA-GFED3) biogeochemical model.

    Dr. Zeng received her B.S. degree from School of Earth and Space Sciences at University of Science and Technology of China, and her Ph.D. from Department of Earth Science at Rice University. Her Ph.D. work focused on how land use and human activities affect the sources and cycling of carbon in subtropical rivers.

     

    Research Interests

    Modeling the global carbon cycle

    Use biogeochemical process models to estimate the spatial and temporal variability in carbon exchange between biosphere and the atmosphere.

    Understanding the effect of soil moisture on carbon fluxes

    Explore the quantitative relationship between soil moisture and photosynthesis, and between soil moisture and microbial respiration.

    Positions/Employment

    9/2015 - Present

    Research Scientist

    Science Systems and Applications, Inc. (SSAI), NASA Goddard Space Flight Center, Greenbelt, MD

    • Upgrading the carbon-nitrogen component of the Catchment-CN model, part of the GEOS-5 system, from CLM4 to CLM4.5
    • Investigating the effect of temporal variability in CO2, precipitation and temperature on modeled carbon fluxes
    • Implementing transient (spatial and temporal varying) CO2 in the Catchment-CN model
    • Optimized model time steps to achieve consistent model output while saving run time
    • Investigated the effect of CO2 fertilization on fraction of absorbed photosynthetically active radiation (FPAR), leaf area index (LAI) and GPP using the Catchment-CN model
     

    1/2011 - 9/2015

    Staff Research Scientist

    Science Systems and Applications, Inc. (SSAI), NASA Goddard Space Flight Center, Greenbelt, MD

    • Investigated the relationship between soil moisture and plant water stress for the use of soil moisture product in CASA-GFED3
    • Benchmarked the CASA-GFED3 model using independent model estimates and eddy covariance observations
    • Conducted sensitivity analyses and Monte Carlo simulations to estimate model uncertainty
    • Evaluated climate effect on the interannual variability in vegetation greenness at global scales
    • Evaluated the effect of elevated atmospheric CO2 on global net primary productivity (NPP) using the CASA-GFED model
     

    Education

    Ph.D., 2010, Earth Science, Rice University, Houston, TX
    B.Sc., 2004, Environmental Science, University of Science and Technology of China, Hefei, Anhui, China
     

    Professional Societies

    AGU, 2006 - Present
    Geological Society of America, 2008 - 2010
    American Association of Petroleum Geologists, 2008 - 2010

    Professional Service

    Reviewer for Remote Sensing of Environment, Remote Sensing, International Journal of Digital Earth, Estuaries and Coasts, Journal of Geophysical Research – Oceans, and Biogeochemistry.

    Department colloquium series organizer (2009)

    Secretary of GeoUnion (graduate student organization of Earth Science at Rice) (2007)

    Awards

    Mills Bennett Fellowship (2008, 2009)

    Chevron Minority Fellowship (2008)

    Watt Fellowship (2005)

    Publications

    Refereed

    Lee, E., F. Zeng, R. D. Koster, et al. B. Weir, L. E. Ott, and B. Poulter. 2018. "The impact of spatiotemporal variability in atmospheric CO2 concentration on global terrestrial carbon fluxes." Biogeosciences, 15: 5635-5652 [10.5194/bg-15-5635-2018]

    Joiner, J., Y. Yoshida, M. Anderson, et al. T. Holmes, C. Hain, R. Reichle, R. Koster, E. Middleton, and F.-W. Zeng. 2018. "Global relationships among traditional reflectance vegetation indices (NDVI and NDII), evapotranspiration (ET), and soil moisture variability on weekly timescales." Remote Sensing of Environment, 219: 339-352 [10.1016/j.rse.2018.10.020]

    Zeng, F., G. Collatz, J. Pinzon, and A. Ivanoff. 2013. "Evaluating and Quantifying the Climate-Driven Interannual Variability in Global Inventory Modeling and Mapping Studies (GIMMS) Normalized Difference Vegetation Index (NDVI3g) at Global Scales." Remote Sensing, 5 (8): 3918-3950 [10.3390/rs5083918]

    Zeng, F., C. A. Masiello, and W. C. Hockaday. 2011. "Controls on the origin and cycling of riverine dissolved inorganic carbon in the Brazos River, Texas." Biogeochemistry, 104 (1): 275-291 [10.1007/s10533-010-9501-y]

    Zeng, F., and C. A. Masiello. 2010. "Sources of CO2 evasion from two subtropical rivers in North America." Biogeochemistry, 100 (1-3): 211-225 [10.1007/s10533-010-9417-6]

    Brief Bio

    Dr. Fanwei Zeng is a contract research scientist working with Dr. Randy Koster in the Global Modeling and Assimilation Office (GMAO) at NASA/GSFC. She is responsible for the maintenance and further development of the carbon-nitrogen (CN) component of the Catchment-CN model, a merger of the carbon physics of Community Land Model version 4 (CLM4) dynamic vegetation model with the energy and water balance formulations of GMAO’s catchment land surface model.

    Prior to joining GMAO, Dr. Zeng worked with Dr. Jim Collatz in the Biospheric Sciences Laboratory at NASA/GSFC on estimating carbon exchange between biosphere and the atmosphere at a global scale using the Carnegie-Ames-Stanford Approach – Global Fire Emissions Database version 3 (CASA-GFED3) biogeochemical model.

    Dr. Zeng received her B.S. degree from School of Earth and Space Sciences at University of Science and Technology of China, and her Ph.D. from Department of Earth Science at Rice University. Her Ph.D. work focused on how land use and human activities affect the sources and cycling of carbon in subtropical rivers.

     

    Publications

    Refereed

    Lee, E., F. Zeng, R. D. Koster, et al. B. Weir, L. E. Ott, and B. Poulter. 2018. "The impact of spatiotemporal variability in atmospheric CO2 concentration on global terrestrial carbon fluxes." Biogeosciences 15 5635-5652 [10.5194/bg-15-5635-2018]

    Joiner, J., Y. Yoshida, M. Anderson, et al. T. Holmes, C. Hain, R. Reichle, R. Koster, E. Middleton, and F.-W. Zeng. 2018. "Global relationships among traditional reflectance vegetation indices (NDVI and NDII), evapotranspiration (ET), and soil moisture variability on weekly timescales." Remote Sensing of Environment 219 339-352 [10.1016/j.rse.2018.10.020]

    Zeng, F., G. Collatz, J. Pinzon, and A. Ivanoff. 2013. "Evaluating and Quantifying the Climate-Driven Interannual Variability in Global Inventory Modeling and Mapping Studies (GIMMS) Normalized Difference Vegetation Index (NDVI3g) at Global Scales." Remote Sensing 5 (8): 3918-3950 [10.3390/rs5083918]

    Zeng, F., C. A. Masiello, and W. C. Hockaday. 2011. "Controls on the origin and cycling of riverine dissolved inorganic carbon in the Brazos River, Texas." Biogeochemistry 104 (1): 275-291 [10.1007/s10533-010-9501-y]

    Zeng, F., and C. A. Masiello. 2010. "Sources of CO2 evasion from two subtropical rivers in North America." Biogeochemistry 100 (1-3): 211-225 [10.1007/s10533-010-9417-6]

                                                                                                                                                                                            
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