Relationship between evapotranspiration and precipitation pulses in a semiarid rangeland estimated by moisture flux towers and MODIS vegetation indices

We used moisture Bowen ratio flux tower data and the enhanced vegetation index (EVI) from the moderate resolution imaging spectrometer (MODIS) on the Terra satellite to measure and scale evapotranspiration (ET) over sparsely vegetated grassland and shrubland sites in a semiarid watershed in southeas...

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Veröffentlicht in:	Journal of arid environments 2007-08, Vol.70 (3), p.443-462
Hauptverfasser:	Nagler, P.L., Glenn, E.P., Kim, H., Emmerich, W., Scott, R.L., Huxman, T.E., Huete, A.R.
Format:	Artikel
Sprache:	eng
Schlagworte:	air temperature Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences botanical composition Ecohydrology estimation evapotranspiration Fundamental and applied biological sciences. Psychology General aspects. Techniques Grassland grasslands mathematical models moderate resolution imaging spectroradiometer moisture flux towers precipitation rangelands Remote sensing Riparian seasonal variation Semiarid environments semiarid zones Shrubland shrublands soil water storage solar radiation Synecology Teledetection and vegetation maps temporal variation Terrestrial ecosystems vegetation vegetation cover watersheds
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Zusammenfassung:	We used moisture Bowen ratio flux tower data and the enhanced vegetation index (EVI) from the moderate resolution imaging spectrometer (MODIS) on the Terra satellite to measure and scale evapotranspiration (ET) over sparsely vegetated grassland and shrubland sites in a semiarid watershed in southeastern Arizona from 2000 to 2004. The grassland tower site had higher mean annual ET (336 mm yr −1) than the shrubland tower site (266 mm yr −1) ( P
ISSN:	0140-1963 1095-922X
DOI:	10.1016/j.jaridenv.2006.12.026