夏季长江中游大暴雨过程中天气系统的共同特征
COMMON FEATURES OF SYNOPTIC SYSTEMS RELATED TO HEAVY RAINSTORMS IN THE MIDDLE CHANGJIANG RIVER BASIN DURING SUMMER
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摘要: 通过对长江中游8次大暴雨过程的合成分析研究, 揭示了长江中游大暴雨发生前后, 对流层高空急流轴和低空SW急流的演变特征及其与大暴雨发生发展之间的关系, 并进一步探讨了暴雨发生前, 西太平洋副高的增强西伸与高空急流轴的东移之间存在的可能联系。Abstract: Through the composite analysis of eight heavy rainstorms in the middle changjiang River basin, revealed are the temporal features of the upper-troposphere jet and the low level SW jet and their interaction with the rainstorm development. The possible links between the westward migration of the western Pacific subtropical high and the eastward movement of the upper level jet anterior to the rainstorm onset are also discussed.
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Key words:
- Heavy rainstorm;
- Upper level jet;
- Low level jet;
- Subtropical high
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表 1 长江中游地区8次大暴雨过程概况
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