Estimation of regional evapotranspiration through remote sensing

Authors
Citation
Fq. Li et Tj. Lyons, Estimation of regional evapotranspiration through remote sensing, J APPL MET, 38(11), 1999, pp. 1644-1654
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
JOURNAL OF APPLIED METEOROLOGY
ISSN journal
0894-8763 → ACNP
Volume
38
Issue
11
Year of publication
1999
Pages
1644 - 1654
Database
ISI
SICI code
0894-8763(199911)38:11<1644:EORETR>2.0.ZU;2-V
Abstract
Models used for the remote estimation of evapotranspiration are evaluated u sing aircraft observations over two distinct vegetation regimes in southwes tern Australia. Single-source models using an empirically determined excess resistance term performed better than a two-source model, which does not r equire such a parameterization. The mean absolute difference between measur ed and estimated values of the sensible heat flux is below 17 W m(-2) in co mparison with approximately 40 W m(-2) for evapotranspiration. Estimates of evapotranspiration depend on the closure of the surface energy balance and incorporate all residual errors in this closure. All models performed bett er over the agricultural vegetation than over the native vegetation.