Postdoctoral Scholar | NASA Jet Propulsion Laboratory
Hydrology - Water Resources - Ecohydrology
I look to better understand the global water cycle and its relation to human activity, the environment, and the earth system. I use observations from eddy covariance towers and satellite to model evapotranspiration. We can apply these models identify the human impact on the water cycle, project changes in water availability, and understand carbon and water cycle dynamics through changes in vegetation stress.
Check out the site and please reach out if you see an opportunity to collaborate or would like to talk about any previous or ongoing projects, publications , teaching, or adventures.
Talsma, C., Good, S.P., Jimenez, C., Martens, B., Fisher, J.B., Miralles, D., McCabe, M., Purdy, A.J. (2018 in press) Partitioning of Evapotranspiration in Remote Sensing-based Models Agricultural and Forest Meteorology.
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.
Massoud, E.C., Purdy, A.J., Miro, M., Famiglietti, J.S. (in review) Projecting groundwater storage changes in California’s Central Valley. Scientific Reports
Massoud, E.C., Purdy, A.J., Christoffersen, B.O., Xu, C. (in review) Bayesian inference of hydraulic properties in and around a Douglas White Fir using a process based ecohydrologic model Environmental Modelling & Software.
Purdy, A.J., Fisher, J.B., Sun, Y., Goulden, M., Randerson, J., Famiglietti, J. (in prep) Carbon vs. Water: Characterizing vegetation stress from space.
I have been fortunate to be involved in teaching at many levels throuhgout my academic career. Below I detail the university level courses I have been involved with. In addition to the courses I have received formal tutoring training from the Cal State System and taken a course in curiculum development and engaged learning from the University of California.
Welcome to my site. I currently reside in Long Beach while finishing up my studies at UC Irvine and NASA's Jet Propulsion Laboratory.
My contact information is listed at the top my CV. Contact me if you see an oportunity to colaborate or to chat science, education, or adventures.