| 河套华北地区旱涝前期的环流异常和遥相关机制 |
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| 引用本文： | 陈晓光,朱乾根,徐祥德.河套华北地区旱涝前期的环流异常和遥相关机制[J].南京气象学院学报,1993(4). |
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| 作者姓名： | 陈晓光 朱乾根 徐祥德 |
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| 作者单位： | 宁夏气象科研所
(陈晓光)，南京气象学院
(朱乾根)，中国气象科学研究院(徐祥德) |
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| 摘 要： | 根据文献5]确定的河套华北地区27个测站夏季(6—8月)降水指数,计算了典型旱涝年平均环流的合成差异场,发现在旱涝年的前期,尤其是在冬半年,大气环流的差异是显著的;旱涝指数与环流的相关,与旱涝合成差异场特征一致;计算的遥相关结果表明,运相关的传播路径与理论上计算得到的波能量传播路径几乎一致,其正负区域、中心位置与旱涝差异场的特征也基本一致。
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| 关 键 词： | 河套华北 旱涝 遥相关 |
PREVIOUS-PERIOD CIRCULATIONAL ABNORMALITY AND TELECONNECTION MECHANISM OF THE DROUGHT AND FLOOD IN NORTH CHINA |
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| Chen Xiaoguang.PREVIOUS-PERIOD CIRCULATIONAL ABNORMALITY AND TELECONNECTION MECHANISM OF THE DROUGHT AND FLOOD IN NORTH CHINA[J].Journal of Nanjing Institute of Meteorology,1993(4). |
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| Authors: | Chen Xiaoguang |
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| Institution: | Chen Xiaoguang (Ningxia Meteorological Institute) Zhu Qiangeng (Nanjing Institute of Meteorology) Xu Xiangde(Chinese Academy of Meteorological Sciences) |
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| Abstract: | Based on the summer precipitation index (June-August) of North China determined in the relevant paper,the present paper calculates the synthetic contrast field of the mean circulation of the typical drought/flood years. It is found that the discrepance of atmospheric circulation is distinct in the previousperiod of the drought/flood year,especially in winter. The correlative features of the drought and flood index(DFI) and the circulation are consistent with those of the drought/flood synthetic contrast field. The calculation result shows that the propagation path of the teleconnection is the same as that of the wave energy theoretically calculated. And their positive and negative regions in the teleconnection map are also consistent with those of the drought/flood synthetic contrast field. |
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| Keywords: | North China drought and flood teleconnection |
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