长江流域旱涝的OLR特征

THE CHARACTERISTICS OF OUTGOING LONGWAVE RADIATION RELATED TO FLOOD AND DROUGHT OVER THE YANGTZE RIVER BASIN

卫星观测的OLR(射出长波辐射)资料已在大气环流变化及气候异常的研究中得到广泛的应用。本文试图利用美国气候分析中心所提供的9年NOAA卫星所观测的OLR资料,对长江流域的夏季雨量的估算进行试验并对旱年、涝年的广大低纬地区的OLR特征进行诊断分析,为卫星资料应用于长江流域的旱涝分析预报作一初步探索。

Nine years of satellite observations of OLR have been used to study precipitation over the Yangtze River Basin and to diagnose the differences between the drought and flood cases. The results indicate that there are good relationships between OLR and precipitation over there and there are markedly differing OLR anomaly patterns in the regions of the ITCZ and the subtropical anticylone over the western Pacific during the drought and flood years.