| 向外长波辐射与我国华北地区旱涝关系的初步研究 |
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| 引用本文： | 李月洪,刘煜.向外长波辐射与我国华北地区旱涝关系的初步研究[J].应用气象学报,1991,2(2):213-217. |
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| 作者姓名： | 李月洪 刘煜 |
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| 作者单位： | 1.国家气象局气象科学研究院
(李月洪)，国家气象局气象科学研究院(刘煜) |
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| 摘 要： | 本文采用1974—1986年的向外长波辐射（OLR）和华北地区降水资料，对该地区旱、涝年的OLR场的时空分布特征进行了研究。分析指出，旱年与涝年的前冬和夏季在OLR距平场上呈相反的配置。同时发现，赤道中太平洋和海洋陆地上的OLR变化会影响华北旱涝的分布趋势，另外，谱分析计算结果指出，当存在准二年周期时，华北地区降水和赤道中太平洋地区的OLR之间有较高的凝聚值，呈正位相振荡。而且后者变化较前者超前大约法10个月。
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A Preliminary Analysis on the Relationship Between Outgoing Longwave Radiation and Drought/Flood over North China |
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| Affiliation: | (Academy of Meteorological Science, SMA) |
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| Abstract: | Based on the outgoing longwave radiation (OLR) data and precipitation data from 17 stations in north China during 1974 through 1986, the temporal and spatial distribution features of the OLR anomaly patterns corresponding to drought or flood cases over north China have been discussed in this paper. It is pointed out that the disposal of the OLR anomaly patterns between the drought and flood cases during the pre-winter or the summer is quite different, and the evolution of the OLR over two key regions, the equatorial central Pacific and the marine continent, can influence the distribution of the drought or flood in north China. By carrying out the multi-spectral analysis between the precipitation over north China and the OLR field over the equatorial central Pacific, a common quasi-biennial oscillations is significant, and the OLR field appear ten months prior to the precipitation. |
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