摘要
本文对长江流域旱涝与太平洋OLR距平场之间的关系进行了研究。计算结果表明,长江流域早年与涝年时,太平洋上的OLR距平场配置相反。旱(涝)年时,西太平洋热带地区OLR为负(正)距平区,而在西太平洋中纬度地区和中太平洋赤道地区OLR为正(负)距平区。用旱年与涝年的差值指数进行分析表明,两种类型年份差异最明显的地区出现在中太平洋赤道地区。 另外,谱分析指出,太平洋赤道地区OLR对长江流域早涝的影响过程是自东向西传递的。同时,东、西太平洋部分热带地区OLR变化超前长江流域降水变化6—10个月。
This paper presents with some results from analyses which show that the arrays of the OLR anomaly pattern might enter the opposite appearances between the drought and flood cases over the Changjiang River Basins. When the negative (positive) OLR anomaly region appeared over the west tropical Pacific with drought/Hood events, the positive (negative) OLR region might be over the equatorial central Pacific. And the most significant difference occured over the equatoral central Paific.The multi-spectral analysis shows that the processes of OLR over the equacoral central Pacific affected on the drought/flood over the Changji-ang River Basins seem to be the westerly propagations.
出处
《气象》
CSCD
北大核心
1990年第8期15-19,共5页
Meteorological Monthly
基金
国家自然科学基金
