HR: 1340h
AN: B33D-1596    [Abstracts]
TI: Estimating evapotranspiration over Yosemite National Park using a regional ecosystem model driven by satellite-based climate data.
AU: * Hashimoto, H
EM: hirofumi.hashimoto@gmail.com
AF: California State University, Monterey Bay, 100 Campus Center, Seaside, CA 93955-8001, United States
AU: * Hashimoto, H
EM: hirofumi.hashimoto@gmail.com
AF: NASA Ames Reseach Center, Mail stop 242-4, Moffett Field, CA 94035, United States
AU: Wang, W
EM: weile.wang@gmail.com
AF: California State University, Monterey Bay, 100 Campus Center, Seaside, CA 93955-8001, United States
AU: Wang, W
EM: weile.wang@gmail.com
AF: NASA Ames Reseach Center, Mail stop 242-4, Moffett Field, CA 94035, United States
AU: Michaelis, A R
EM: amac@hyperplane.org
AF: California State University, Monterey Bay, 100 Campus Center, Seaside, CA 93955-8001, United States
AU: Michaelis, A R
EM: amac@hyperplane.org
AF: NASA Ames Reseach Center, Mail stop 242-4, Moffett Field, CA 94035, United States
AU: Melton, F S
EM: fmelton@arc.nasa.gov
AF: California State University, Monterey Bay, 100 Campus Center, Seaside, CA 93955-8001, United States
AU: Melton, F S
EM: fmelton@arc.nasa.gov
AF: NASA Ames Reseach Center, Mail stop 242-4, Moffett Field, CA 94035, United States
AU: Ichii, K
EM: ichii@sss.fukushima-u.ac.jp
AF: Fukushima University, 1 Kanayagawa, Fukushima, 960-8055, Japan
AU: Nemani, R R
EM: rnemani@arc.nasa.gov
AF: NASA Ames Reseach Center, Mail stop 242-4, Moffett Field, CA 94035, United States
AB: Estimation of evapotranspiration over complex terrains is difficult because of the sparse distribution of ground- based observations and the large errors associated with extrapolating these data. Satellites, however, provide spatially continuous and consistent observations of key climate and vegetation variables, which may help us to overcome this difficulty. Here, we report our effort to estimate evapotranspiration over Yosemite National Park using a regional ecosystem model driven by satellite data (MODIS, GOES, and TM). The Terrestrial Observation and Prediction System (TOPS) was used in this study to simulate water and carbon fluxes. We also used the Variable Infiltration Capacity (VIC) routing model for validation of simulated water budgets using the discharge data at two locations in the park. The estimated evapotranspiration was reasonable both in terms of its spatial variability and in relation to the discharge data. Compared to other climate interpolation methods, this method is computationally inexpensive and can capture more detail for patchy regions like fire scares and logged areas.
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0480 Remote sensing
DE: 1813 Eco-hydrology
DE: 1818 Evapotranspiration
SC: Biogeosciences [B]
MN: 2007 Fall Meeting