| 3个登陆台风引发阳江特大暴雨的水汽输送对比分析 |
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| 引用本文：黄小丹,黄先伦,麦宗天,等.3个登陆台风引发阳江特大暴雨的水汽输送对比分析[J].气象与环境科学,2015,38(3):61-69..Comparative Analysis of Vapor Transportation of Typhoon Landing and Producing Torrential Rain in Yangjiang[J].Meteorological and Environmental Sciences,2015,38(3):61-69. |
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| 作者姓名：黄小丹 黄先伦 麦宗天 等 |
| 作者单位：1.阳江市气象局，广东 阳江 529500； 2.广东省气象台，广州 510080 |
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| 中文摘要:利用区域自动站资料及NCEP再分析资料，对0915号“巨爵”、1006号“狮子山”和1011号“凡亚比”登陆后引发阳江特大暴雨的水汽输送特征进行了对比分析，并应用HYSPLIT-4 轨迹模式验证了水汽来源。结果表明：1）它们引发阳江特大暴雨期间，低纬西南季风活跃。“巨爵”影响时由来自印度洋与副高西侧偏南气流汇合产生强降雨，水汽来源于中南半岛和孟加拉湾；“狮子山”影响时西南水汽输入明显减弱，主要由偏东气流携南海近海水汽的注入引发了局地短而强的降雨，水汽来源于南海近海；“凡亚比”登陆后，北部湾超低空急流的暴发，有利于强西南气流携带水汽经粤西往“凡亚比”输送，引发粤西地区特大暴雨，水汽主要来源于北部湾。2）强降雨都是始于阳江特大暴雨区纬向风转东风或经向风转南风阶段。“巨爵”、“凡亚比”引发阳江强降雨前后， 850 hPa南海、北部湾经向风南风明显增大，加强了海上水汽的向北输送。“狮子山”影响时则是由于近海短时间转东风，水汽由东输入并加强了辐合。3）水汽输送以“巨爵”最强、“狮子山”最弱，水汽辐合层次“巨爵”和“狮子山”较“凡亚比”要浅薄。它们的低层水汽辐合中心与特大暴雨区有很好的对应关系。 |
| 中文关键词:登陆台风 特大暴雨 水汽输送 对比分析 |
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| Comparative Analysis of Vapor Transportation of Typhoon Landing and Producing Torrential Rain in Yangjiang |
| Authors:Huang Xiaodan Huang Xianlun Mai Zongtian et al |
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| Abstract:Using the automatic observation station data and NCEP reanalysis data, this paper explores the root cause of Yangjiang extraordinary rainstorm after the landing of Koppu(0915), Lionrock(1006) and Fanapi(1011) and contrasts the characteristics of water vapor transport. Based on HYSPLIT-4 trajectory model, this paper also examines the source of water vapors. These findings show: 1)the low latitude monsoon at the southwest moved actively during heavy rainfall in Yangjiang. For Koppu, continuous southwest wind from the Bay of Bengal to the South China Sea converged south wind from the west side of the subtropical high caused heavy rainfall. Vapor originated from Indochina and the Bay of Bengal. For Lionrock, water vapors transferred from the southwest obviously weakened, injection from the easterly winds triggered a short and strong local rainfall, and the vapor originated from coastal waters of the South Sea. After the landing of Fanapi, the breakout of Beibu Gulf ultralow-altitude jet stream helped the transfer of southwest water vapors to Fanapi typhoon through the west of Guangdong province, and the vapor mainly originated from the Beibu Gulf. 2)Heavy rains began in the zonal winds turn easterly or meridional winds turn southerly. Around heavy rainfall of Koppu and Fanapi, the south wind of 850 hPa increased significantly from South China Sea and Beibu Gulf, and enhanced the vapor transportation to the north. For Lionrock, the coastal wind turned east, which caused the vapor input from east and enhanced the convergence. 3)In terms of water vapors transfer, Koppu was the strongest while Lionrock was the weakest, the moisture convergence level of Koppu and Lionrock shallower than Fanapi’s. Water vapor convergence belt was close to the left side of large water vapor flux center, which well-matched the extraordinary rainstorm area. |
| Keywords:landing typhoon torrential rain water vapor transport comparative analysis |
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