AJ Purdy

AJ Purdy

Assistant Professor

Full-Time Faculty

(415) 422-6553 Harney Science Center 404C


A.J. Purdy’s research leverages satellite observations, models, and geospatial analyses to study hydrology, water resources, ecosystems, and the environment from watershed to global scales. Dr. Purdy received his MS and PhD in earth system science from UC Irvine. His dissertation research focused on the advancement and application of remotely sensed evapotranspiration. He also completed an MS in coastal watershed science and policy from CSU Monterey Bay, where he gained valuable experience working with farmers to improve on-farm management in California’s Central Valley. His BS is in industrial and systems engineering from University of San Diego. He is a member of Tao Beta Pi, the engineering honors society.

Before arriving at USF, Dr. Purdy was a postdoctoral scholar at NASA's Jet Propulsion Laboratory, studying linkages between carbon and water cycling using state-of-the art satellite observations, developing open-source software to ease the use of NASA data to support water management, and collaborating with industrial designers to improve drought data communication. Outside of work, AJ enjoys surfing, camping, and adventuring with his wife, daughter, and dog.

PhD, Earth System Science, UC Irvine
MS, Watershed Science and Policy, CSU Monterey Bay
BS, Industrial and Systems Engineering, University of San Diego
Selected Publications

Purdy, A.J., et al. (2019), Designing drought indicators. Bulletin of the American Meteorological Society https://doi.org/10.1175/BAMS-D-18-0146.1

Purdy, A.J., et al. (2018), SMAP soil moisture improves global evapotranspiration. Remote Sensing of Environment 219: 1-14 https://doi.org/10.1016/j.rse.2018.09.023

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

Fisher, J.B. ... A.J. Purdy, ... et al. (2017) The Future of Evapotranspiration: Global requirements for ecosystem functioning, carbon and climate feedbacks, agricultural management, and water resources. Water Resources Research 53(4): 2618-2626

Castle, S., .. Purdy, A.J., .. et al., (2016), Remote detection of water management impacts on evapotranspiration in the Colorado River Basin. Geophysical Research Letters 43, 5089–5097, doi:10.1002/2016GL068675.

Awards & Distinctions

NASA Earth and Space Science Fellowship

Tao Beta Pi