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| Titel |
Effects of surface wind speed decline on modeled hydrological conditions in China |
| VerfasserIn |
X. Liu, X.-J. Zhang, Q. Tang, X.-Z. Zhang |
| 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 ; 18, no. 8 ; Nr. 18, no. 8 (2014-08-01), S.2803-2813 |
| Datensatznummer |
250120422
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| Publikation (Nr.) |
 copernicus.org/hess-18-2803-2014.pdf |
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| Zusammenfassung |
| Surface wind speed decline in China has been widely reported, but
its effects on hydrology have not been fully evaluated to date. In this
study, the effects of wind speed change on modeled hydrological conditions
are investigated using the Variable Infiltration Capacity (VIC) hydrological
model for China during the 1966–2011 period. Two model experiments, i.e., VIC
simulations with the observed (EXP1) and detrended wind speed (EXP2), are
performed over the major river basins in China. The differences between the
two experiments are analyzed to assess the effects of wind speed decline.
Results show that wind speed has decreased by 29% in China. The wind
speed decline would have resulted in a decrease in evapotranspiration of
1–3% of mean annual evapotranspiration and an increase in runoff of
1–6% of mean annual runoff at most basins in China. The sensitivities of
evapotranspiration and runoff changes to wind speed change are larger in
humid areas than dry areas, while the sensitivity of soil moisture change to
wind speed change is situation dependent. The wind speed decline would have
offset the expansion of the drought area in China. It has contributed to
reducing drought areas by 8.8% of the mean drought area (i.e.,
approximate 106 × 103 km2 out of 1.2 × 106
km2) over China. The reductions of soil moisture drought induced by
wind speed decline are large (more than 5% of the mean drought area) in
most basins, except in the Southwest and Pearl River basins. |
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