近50年中国冬季大地冷涡与春夏季干旱相关的统计

THE RELATIONSHIP OF BIG UNDERGROUND COLD VORTEX IN WINTER AND THE DROUGHT IN SPRING AND SUMMER DURING THE LAST 50 YEARS

中文关键词:  冬季大地冷涡，春夏季干旱，短期气候预测

英文关键词:Big underground cold vortex in winter, Drought in spring and summer, Short-term climate predicting.

中文摘要:

      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。

英文摘要:

      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 high-pressure 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.