摘要
该文选取了东北地区 4个典型多雨年和 4个典型少雨年 ,利用 OLR资料对该地区旱涝年 OL R场的时空分布规律及其低频振荡的传播特征进行了合成对比分析 .结果表明 ,东北旱涝与低纬 OLR的分布及其变化密切相关 ,特别是西北太平洋副热带高压、西太平洋 ITCZ和印度 ITCZ的位置和强度以及赤道中东太平洋 OL R的距平在旱涝年均有显著差别 ,并且热带和副热带 OLR低频振荡的向北传播对东北地区夏季降水也有至关重要的影响 .
By using the outgoing longwave radiation(OLR)data and precipitation data,the temporal and spatial distribution features of the OLR anomaly patterns corresponding to flood and drought cases over Northeast China are studied.The results show that there is a close correlation between the flood and drought over Northeast China and the OLR distribution at low latitudes.There are remarkable differences for OLR anomaly patterns in the regions of ITCZ,equatorial East Central Pacific and the subtropical high over West Pacific in flood and drought years.Furthermore,the northward propagation of low frequency oscillation of OLR over tropical and subtropical areas has great impacts on the summer precipitation over Northeast China.
出处
《应用气象学报》
CSCD
北大核心
2000年第2期228-235,共8页
Journal of Applied Meteorological Science
关键词
东北地区
旱涝
低频振荡
副热带高压
厄尔尼诺
Flood and drought over Northeast China OLR feature Low frequency oscillation Intertropical convergence zone(ITCZ) Subtropical high
