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Adam Purdy

Senior Research Scientist

Affiliation: California State University, Monterey Bay

Branch: Biospheric Science Branch (SGE)


Professional Bio

Dr. A.J. Purdy is a senior research scientist and adjunct faculty in the Department of Applied Environmental Science at CSUMB and NASA Ames Research Center. He is a member of the inaugural OpenET Science Team and currently serves as a Science Team technical expert for NASA’s Western Water Applications Office.

Dr. Purdy has over 10 years of experience in development of satellite-driven evapotranspiration models and ground evaluations. He is interested in developing tools to support applications of scientific models and datasets. Dr. Purdy’s research experience has leveraged data from multiple NASA satellite missions (Landsat, MODIS, OCO-2, SMAP, GRACE, and ECOSTRESS) to study changes in water availability and model water cycling. 

Prior to joining CSUMB/NASA-ARC CREST, AJ served as an assistant professor in the GeoSpatial Analysis Laboratory and Department of Environmental Science at the University of San Francisco and a Postdoctoral Fellow at NASA’s Jet Propulsion Laboratory.


Ph.D. Earth System Science – University of California, Irvine

M. Sc. Earth System Science – University of California, Irvine

M. Sc. Watershed Science and Policy – California State University, Monterey Bay

B. Sc. Industrial and Systems Engineering, Unviersity of San Diego

Research Interests

Water resources, Hydrology, Evapotranspiration

Awards & Honors

NASA Earth System Science Fellowship

Tau Beta Pi, Engineering Honor Society

Select Publications

Liu, P.W., Famiglietti, J.S., Purdy, A.J., et al., Groundwater Depletion in California’s Central Valley Accelerates During Megadrought (2022). Nature Communications 13:7825

Purdy, A.J., David, C.H., Sikder, M.S., Reager, J.T., Chandanpukar, H.A., Jones, N.L., Matin, M.A., (2019). An open-source tool to facilitate the processing of GRACE observations and GLDAS outputs: an evaluation in Bangladesh. Front. Environ. Sci., 23.

Purdy, A.J., Kawata, J., Fisher, J.B., Reynolds, M., Om, G., Ali, Z., Babikian, J., Roman, C., Mann, L., Designing drought indicators. Bulletin of the American Meteorological Society

Massoud, E.C., Purdy, A.J., Miro, M., Famiglietti, J.S. Projecting groundwater storage changes in California’s Central Valley (2018). Scientific Reports 8 (1), 12917

Purdy, A.J., Fisher, J.B., Goulden, M.L., Colliander, A., Halverson, G., Tu, K., Famiglietti, J.S., SMAP soil moisture improves global evapotranspiration (2018). Remote Sensing of Environment 219: 1-14

Purdy, A.J., Fisher, J.B., Goulden, M., Famiglietti,J.S., (2016),  Ground heat flux: An analytical review of 6 models evaluated at 88 sites and globally. JGR Biogeosciences.