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。
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.
出处
《南京气象学院学报》
CSCD
1993年第4期392-398,共7页
Journal of Nanjing Institute of Meteorology
关键词
旱涝
遥相关
环流异常
华北地区
North China, drought and flood, teleconnection
