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| Titel |
Actual daily evapotranspiration estimated from MERIS and AATSR data over the Chinese Loess Plateau |
| VerfasserIn |
R. Liu, J. Wen, X. Wang, L. Wang, H. Tian, T. T. Zhang, X. K. Shi, J. H. Zhang, Sh. N. Lv |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 1 ; Nr. 14, no. 1 (2010-01-11), S.47-58 |
| Datensatznummer |
250012145
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| Publikation (Nr.) |
 copernicus.org/hess-14-47-2010.pdf |
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| Zusammenfassung |
| The Chinese Loess Plateau is located in the north of China and has a
significant impact on the climate and ecosystem evolvement over the
East Asian continent. Estimates of evapotranspiration (ET) at a
regional scale are in crucial need for climate studies, weather
forecasts, hydrological surveys, ecological monitoring and water
resource management. In this research, the ET of the Chinese Loess
Plateau was estimated by using an energy balance approach and data
collected during the LOess Plateau land-atmosphere interaction pilot
EXperiments 2005 (LOPEX05). With the combined data of the Medium
Resolution Imaging Spectrometer (MERIS), the Advanced Along-Track
Scanning Radiometer (AATSR) and some other variables such as air
temperature, crop height and wind speed, the instantaneous net
radiation, sensible heat flux and soil heat flux were calculated;
the instantaneous latent heat flux was derived as the residual term
of energy balance, and then converted to daily ET value by sunshine
duration. The calculated daily ET from the model showed a good match
with the measurements of the eddy covariance systems deployed in
LOPEX05. The minimum relative error of this approach is 9.0%, the
cause of the bias was also explored and discussed. |
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