长江中下游梅雨期旱涝的OLR场特征

THE OLR FIELD CHARACTERISTICS OF FLOOD/DROUGHT OVER MIDDLE AND LOWER CHANGJIANG VALLEY DURING THE MEl-YU SEASON

利用卫星观测的OLR资料对长江中下游梅雨期旱涝年的个例作诊断分析。结果表明OLR场与长江中下游梅雨期旱涝是有较好的关系。主要表现在同期的西太平洋的ITCZ和副热带高压区域的OLR场的距平分布和前冬的赤道太平洋地区的OLR场距平的配置。

The satellite olservations of OLR have been used to diagnose the differences between the draught and flood cases over middle and lower changjiang valley during the Mei-Yu season. The results indicate that there are good relationships between OLR field and rainfall over there.During the drought and flood years there are markdely differing OLR anomaly Patterns in the regions of the ITCZ and the subtropical anticylone over the western Pacific in the meatime, and in the regions of the equatorial Pacific Ocean in the last winter.