HR: 10:45h
AN: H32B-02    [Abstracts]
TI: Global Evaluation of a MODIS-based Evapotranspiration Product
AU: * Wood, E F
EM: efwood@princeton.edu
AF: Princeton University, Department of Civil and Environmental Engineering, Princeton, NJ 08544 United States
AU: McCabe, M
EM: mmccabe@princeton.edu
AF: Princeton University, Department of Civil and Environmental Engineering, Princeton, NJ 08544 United States
AU: Su, H
EM: hongbosu@princeton.edu
AF: Princeton University, Department of Civil and Environmental Engineering, Princeton, NJ 08544 United States
AB: Both observations and theoretical simulation show that the surface hydrologic condition and vegetation cover have a major control on surface energy flux patterns. Remote sensing techniques provide a basis for assessing these controls, and the subsequent patterns of surface fluxes at scales ranging from kilometres to regional and, potentially, to global scales. These remotely sensed data, and their derived hydrologic variables can be compared to and combined with hydrological models to estimate the surface water and energy balances at continental to global scales. In this presentation, regional estimates of the evapotranspiration, based on a combination of remote sensing measurements and operational surface observations, will be presented using the Surface Energy Balance System. Results will be obtained for a diverse set sites identified as part of the GEWEX Global Energy and Water Experiments (GEWEX) Coordinated Enhanced Observation Period (CEOP), and represent a range of hydroclimatologies and surface condition making them ideally suited to the assessment of routine retrieval of remote sensing based evapotranspiration. Surface temperature and vegetation information is based on MODIS satellite retrievals and are used in conjunction with the Global Land Data Assimilation (GLDAS) project data to estimate daily values of evapotranspiration. These estimates are compared with both tower flux data and GLDAS derived estimates forcing.
DE: 1818 Evapotranspiration
DE: 1836 Hydrologic budget (1655)
DE: 1894 Instruments and techniques
SC: Hydrology [H]
MN: 2005 Joint Assembly