EFFECTS OF TEMPERATURE ANOMALIES ON THE PALMER DROUGHT SEVERITY INDEX IN THE CENTRAL UNITED STATES
EFFECTS OF TEMPERATURE ANOMALIES ON THE PALMER DROUGHT SEVERITY INDEX IN THE CENTRAL UNITED STATES
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DOI：
10.1002/1097-0088(200012)20:15
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发表时间：
2000-12
期刊：
影响因子：
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通讯作者：
Q. Hu;G. Willson
中科院分区：
文献类型：
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作者：
Q. Hu;G. Willson
这项研究的目的是提高我们对帕尔默干旱严重程度指数（PDSI）的理解和降水效应。同样受到温度和降水的影响，使用观察数据的计算进一步说明了中部的温度对PDSI对PDSI的影响，对PDSI的温度效应复杂化。气象学会。
The purpose of this study is to improve our understanding of temperature and precipitation effects on the Palmer Drought Severity Index (PDSI). Both theoretical and observational analyses were applied to separate and compare temperature and precipitation effects on PDSI. The results showed that because of the dependence of PDSI on the ‘climatologically appropriate rainfall’, which is a function of time and varies with surface air temperature, the PDSI can be equally affected by temperature and precipitation, when both have similar magnitudes of anomalies. Calculations using observational data further illustrated the temperature influence on PDSI in different climate regions in the central United States. The temperature effect on PDSI complicates the usage of the index in interpreting precipitation anomalies and its application in inferring precipitation variations, particularly from reconstructed PDSI. Copyright © 2000 Royal Meteorological Society.