| 2008年前汛期广东长连续暴雨过程的500hPa环流场特征 |
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| 引用本文： | 温晶,纪忠萍,谢炯光.2008年前汛期广东长连续暴雨过程的500hPa环流场特征[J].广东气象,2008,30(4):8-11. |
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| 作者姓名： | 温晶 纪忠萍 谢炯光 |
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| 作者单位： | 1. 广东省气象台,广东广州,510080
2. 广东省气象台,广东广州,510080;中国气象科学研究院灾害天气国家重点实验室,北京,100081 |
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| 基金项目： | 中国气象局气象新技术推广预报员专项，广东省科技厅科技计划 |
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| 摘 要： | 2008年5月下旬末～6月18日，广东遭受1951年以来最严重的“龙舟水”袭击。通过分析这次长连续暴雨过程开始、持续和结束期的500hPa侯平均环流特征和稳定维持的大尺度环流场特征，发现欧亚中高纬维持两槽两脊或两槽一脊稳定的大环流形势，为暴雨的持续提供了弱冷空气；孟湾低槽为华南地区提供了充足的水汽条件；西太平洋副热带高压的加强西伸，使华南沿海地区暖湿气流加强而产生强降水。
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| 关 键 词： | 天气学 阻塞高压 东亚大槽 暖湿气流 持续性暴雨 广东 |
Characteristics of 500hPa Circulations of Continuous Rainstorm Event in First Rainy Season of 2008 in Guangdong |
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| WEN Jing,JI Zhong-ping,XIE Jiong-guang.Characteristics of 500hPa Circulations of Continuous Rainstorm Event in First Rainy Season of 2008 in Guangdong[J].Journal of Guangdong Meteorology,2008,30(4):8-11. |
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| Authors: | WEN Jing JI Zhong-ping XIE Jiong-guang |
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| Institution: | WEN Jing , JI Zhong - ping, XIE Jiong - guang (1. Guangdong Meteorological Observatory, Guangzhou 510080, China; 2. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 10081, China) |
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| Abstract: | Guangdong had suffered from the heaviest rainfall during late May to 18th June,2008 ever since 1951.Analysis on the large-scale 500 hPa pentad average circulations for the start,duration and end of this process is performed.Results show that,the persistence of the two-trough-and-two-ridge or two-trough-and-one-ridge circulations in high latitude of Eurasian continent supplies weak cold air for the heavy rainfall process,the trough over the Bay of Bengal transfers sufficient vapor,and the intensification and westward extension of the Western Pacific subtropical high strengthens the warm and moist stream to trigger the torrential rain event. |
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| Keywords: | synoptic meteorology blocking high East Asian Trough warm and moist stream consecutive rainstorm Guangdong |
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