Details

Autor(en) / Beteiligte

• Tang, Ronglin
• Li, Zhao‐Liang

Titel

An improved constant evaporative fraction method for estimating daily evapotranspiration from remotely sensed instantaneous observations

Ist Teil von

• Geophysical research letters, 2017-03, Vol.44 (5), p.2319-2326

Ort / Verlag

Washington: John Wiley & Sons, Inc

Erscheinungsjahr

2017

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Evapotranspiration (ET) is a primary mechanism for water and heat transfer between land and the atmosphere. One approach to estimate ET is from instantaneous remotely sensed data. The constant evaporative fraction (EF) method is then usually used to estimate integrated daily fluxes, which are typically underestimated values. Here we present a theoretical improvement to the conventional EF. The improved EF is shown to be robust and superior to the conventional approach, and it significantly reduces the underestimation bias. Key Points A new constant EF method is developed to improve the conversion of remotely sensed instantaneous LE to a daily scale The improved constant EF method significantly reduces the underestimation of the daily LE encountered in the conventional method The improved constant EF method is demonstrated to be robust and superior to the conventional method