ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 39 Issue 9 > 2013,39(9):1154-1162. DOI:10.7519/j.issn.1000-0526.2013.09.010 Prev Next
Analysis of Drought in North China Based on Evapotranspiration Drought Index
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Abstract:
Daily actual evapotranspiration is estimated based on surface net radiation, vegetation index, mean temperature and daily temperature difference by using satellite remote sensing data and routine meteorological data. Also, the estimated ET is compared with the measured ET using eddy covariance method at Luancheng Station. Besides, the temporal and spatial variation of actual evapotranspiration and its impact factors are analyzed qualitatively. According to the evapotranspiration drought index (EDI), the distribution characteristics of drought in North China is analyzed and compared to Palmer index and precipitation anomaly percentage respectively. The results show that the estimated evapotranspiration through the ET model correlates well with the measured ET and the estimation is acceptable for assessing the drought conditions in large areas. In addition, the EDI anomaly can reflect a higher spatial resolution of drought pattern and is reliable in the indication and judgment of drought.
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