Trends in pan evaporation and actual evapotranspiration across the conterminous U.S.: Paradoxical or complementary?

Details Trends in pan evaporation and actual evapotranspiration across the conterminous U.S.: Paradoxical or complementary? Trends in pan evaporation and actual evapotranspiration across the conterminous U.S.: Paradoxical or complementary?

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3113503h&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 13, CiteID L13503

Physics

36

Hydrology: Evapotranspiration, Hydrology: Hydroclimatology, Global Change: Water Cycles (1836), Meteorology And Atmospheric Dynamics: Climatology (1620), Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions

Scientific paper

Pan evaporation (ETpan) has decreased at 64% of pans in the conterminous U.S. over the past half-century. Comparing trends in ETpan and water budget-derived actual evapotranspiration (ET*a), we observe the so-called ``Pan Evaporation Paradox,'' which we confirm is no more than a manifestation of the complementarity between actual evapotranspiration (ETa) and potential evapotranspiration (ETp). Examining trends in the components of ETa-the radiative energy and regional advective budgets-we show that both components must be considered together to explain the relationship between ETpan and ET*a.

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