Sr. Research Scientist
California State University at Monterey Bay
Liu, P.W. ... Purdy, A.J. et. al., (in prep) Tracking groundwater response to water management in California's Central Valley with GRACE and GRACE-FO
Felton, A, ... Purdy, A.J. et. al., (in prep) The storage and transit time of water through vegetation.
Purdy, A.J. et al., (in prep) Exploring hydroclimatic drivers of trends in evapotranspiration from 2002 to 2021
Wu, G., Cai, X., Keenan, T.F., Li, S., Lou, X., Fisher, J.B., Cao, R., Li, F., Purdy, A.J. Zhao, W., Sun, X., Hu, Z. (2020) Evaluating three evapotranspiration estimates from model of different complexity over China using the ILAMB benchmarking system Journal of Hydrology 590:125553
Fisher, J.B., Lee, B.,Purdy, A.J., Halverson, G. et. al (2020) ECOSTRESS: NASA’s next generation mission to measure evapotranspiration from the International Space Station Water Res. Res.
Sadeghi, M., Ebtehaj, A., Crow, W.T., Gao, L., Purdy, A.J.,Fisher, J.B., Jones, S.B., Tuller, M. (2020) Global Estimates of Land Surface Net Water Flux from SMOS and SMAP Satellite Soil Moisture Data Journal of Hydrometeorology
Purdy, A.J., David, C.H., Sikder, M.S., Reager, J.T., Chandanpurkar, H.A., Jones, N.L., Matin, M.A., J. (2019) GRACE satellites observe the fingerprint of water management in Bangladesh Frontiers in Environmental Science
Massoud, E.C., Purdy, A.J., Christoffersen, B.O., Xu, C., Santiago, L. (2019), Bayesian inference of hydraulic properties in and around a Douglas White Fir using a process based ecohydrologic model Environmental Modelling & Software. 115:76-85
Purdy, A.J., Fisher, J.B., Goulden, M.L., Colliander, A., Halverson, G., Tu, K., Famiglietti,J.S., (2018), SMAP soil moisture improves global evapotranspiration. Remote Sensing of Environment 219: 1-14 https://doi.org/10.1016/j.rse.2018.09.023
Talsma, C.J., Good, S.P., Miralles, D.G., Fisher, J.B., Martens, B., Jiménez, C., Purdy, A.J., (2018) Sensitivity of Evapotranspiration Components in Remote Sensing-Based Models. Remote Sens. 10, 1601; doi:10.3390/rs10101601
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
Talsma, C., Good, S.P., Jimenez, C., Martens, B., Fisher, J.B., Miralles, D., McCabe, M., Purdy, A.J. (2018) Partitioning of Evapotranspiration in Remote Sensing-based Models Agricultural and Forest Meteorology 260, 131:143.
Joshua B. Fisher, Elizabeth Middleton, Forrest Melton, Martha Anderson, Simon Hook, Christopher Hain, Richard Allen, Matthew McCabe, Jean-Pierre Lagouarde, Kevin Tu, Dennis Baldocchi, Philip A. Townsend, Ayse Kilic, Johan Perret, Diego Miralles, Duane Waliser, A.J. Purdy, Andrew French, David Schimel, James S. Famiglietti, Graeme Stephens, Eric F. Wood, (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
Purdy, A.J., Fisher, J.B., Goulden, M.L., Famiglietti,J.S., (2016), Ground heat flux: An analytical reveiew of 6 models evaluated at 88 sites and globally. JGR Biogeosciences. 121, 3045–3059, doi:10.1002/2016JG003591. EOS Research Spotlight Dec 6, 2016
Castle, S., Thomas, B., Reager, J.T., Purdy, A.J., Lo, M., Famiglietti, J.S., (2016), Remote detection of water management impacts on evapotranspiration in the Colorado River Basin. Geophysical Research Letters 43, 5089–5097, doi:10.1002/2016GL068675.
Melton, F.S., Johnson, L.F., Lund, C.P., Pierce, L.L., Michaelis, A.R., Hiatt, S.H., Guzman, A., Adhikari, D.D., Purdy, A.J., Rosevelt, C., Votava, P., Trout, T.J., Temesgen, B., Frame, K., Sheffner, E.J., Nemani, R.R., (2012), Satellite irrigation management support with the terrestrial observation and prediction system: a framework for integration of satellite and surface observations to support improvements in agricultural water resource management. IEEE Journal of Selected Topics in Applied Earth Observation and Remote Sensing 5(6): 1709-1721. doi:10.1109/JSTARS.2012.2214474.
If appropriate, please feel free to invite me as a collaborator. Please provide at least two weeks notice to provide substantive contributions to analysis and manuscript to merit coauthorship. Reach out if you need data at a different cadence and/or generated with a different forcing dataset.
Prior to CSUMB, I taught, created, and developed a number of graduate and undergraduate geosptial technology and GIS classes. Below you can find a list of courses by year.
I am currently a senior research scientist at California State University at Monterey Bay (CSUMB). I am optimistic about the power of science to impart positive change in one's local community and the world. At CSUMB I look forward to developing new applications of satellite data to support water managers, agricultural producers, and land managers in California.
Prior to CSUMB, I served as an assistant professor at University of San Francisco (2019-2022) and a postdoctoral fellow at NASA's Jet Propulsion Laboratory (2018-2019). My research experience includes using data from multiple NASA satellite missions (Landsat, MODIS, SMAP, GRACE, and ECOSTRESS) to advance science related hydrology and water resources.
I hold a PhD in Earth System Science from UC Irvine and a MS in Watershed Science and Policy from CSUMB. My PhD dissertation focused on the advancement and applications of satellite-derived evapotranspiration algorithms.
Outside of the office, I enjoy spending my time surfing, camping, and adventuring with my family.
My contact information is listed at the top my resume. Please contact me if you want to join on-going research projects, see an oportunity to colaborate, or just want to chat science, education, or adventures.