摘要
通过对冬季大地冷涡与春夏季干旱的相关分析,发现:除高原主体外,冬季的大地冷涡对应着春夏季为干旱少雨区;而且大地冷涡东面的地冷涡绝大多数也是春夏季的干旱少雨区。冬季大地冷涡在中国的出现频率为80%,可作为短期气候预测的重要因子。
The underground cold thermal vortex has not been analyzed in past studies. In fact, both the thermal vortex and the cold vortex are the conflict entities, just like the low-pressure system （the cyclone） and the highpressure system （the counter cyclone） in the synoptic map. The warm vortex and the cyclone are initiative for the weather and climate change; on the contrary, the cold vortex and the anticyclone are regarded as the passivity. The cold vortex area is much larger than the warm one, and the biggest cold vortex area is above 2,000 thousands km2 normally. The correlation of the cold vortex and the drought is very high, and so it is important to predict the rainfall in flood season. The relationship of big underground cold vortex in winter and the drought in spring and summer during the last 50 years was discussed. By analyzing the big underground cold vortex in winter and drought in spring and summer, the result shows that except the main body of the Tibetan Plateau, the regions of the big underground cold vortex in winter would be dry in spring and summer, and the underground cold vortex at the catchment＇s area of the big underground vortex is almost the same. The frequency of the big underground cold vortex in China is 80 %, and so it is important for the short-term climate predicting.
出处
《气象学报》
CAS
CSCD
北大核心
2005年第6期1006-1009,共4页
Acta Meteorologica Sinica
基金
国家科技部科研院所社会公益研究项目"中国干旱气象灾害监测预警方法研究"(2004DIB5J192)
关键词
冬季大地冷涡
春夏季干旱
短期气候预测
Big underground cold vortex in winter, Drought in spring and summer, Short-term climate predicting.
