Estimating Large-Scale Precipitation Minus Evapotranspiration from GRACE Satellite Gravity Measurements
作者： Sean Swenson , John Wahr
DOI: 10.1175/JHM478.1
关键词: Meteorology 、 Environmental science 、 Water balance 、 Atmospheric sciences 、 Discharge 、 Precipitation 、 Satellite 、 Gravity (chemistry) 、 Evapotranspiration 、 Flux 、 Atmosphere
摘要: Abstract Currently, observations of key components the earth's large-scale water and energy budgets are sparse or even nonexistent. One component, precipitation minus evapotranspiration (P − ET), remains largely unmeasured due to absence ET. Precipitation describes flux between atmosphere surface, therefore provides important information regarding interaction with land surface. In this paper, changes in continental storage derived from satellite gravity data Gravity Recovery Climate Experiment (GRACE) project combined river discharge obtain estimates areally averaged P After constructing an equation describing terrestrial balance reflecting temporal sampling GRACE estimates, GRACE-derived ET compared those obtained a reanalysis dataset [NCEP/Department Energy (DO...
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