| 甘南州2011年7月2—5日持续性暴雨天气成因分析 |
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| 引用本文： | 宁和平,韩莹,王建兵,刘洪兰. 甘南州2011年7月2—5日持续性暴雨天气成因分析[J]. 中国农学通报, 2014, 30(23): 218-223. DOI: 10.11924/j.issn.1000-6850.2013-3211 |
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| 作者姓名： | 宁和平 韩莹 王建兵 刘洪兰 |
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| 作者单位： | 1. 甘肃省甘南州气象局2. 甘肃省张掖市气象局 |
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| 基金项目： | 甘肃省气象局“甘肃省对流性天气预报预警系统建设” |
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| 摘 要： | 通过对2011年7月2日—5日甘南州出现的一次持续性暴雨天气过程成因的诊断分析，指出这次强降水天气过程与500 hPa上的切变线以及700 hPa强辐合区的位置密切相关。低层的强烈辐合为暴雨的发生、发展提供了动力条件。通过对物理量场的分析，发现这次持续暴雨过程中在中低层有明显的湿层及水汽的辐合，从而为降水提供了充足的水汽条件。在副高外围西南气流中的持续上升运动，源源不断地将水汽和能量向东输送到降水区，是形成这次持续性暴雨天气过程的主要原因。
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| 关 键 词： | 处理时间 处理时间 |
| 收稿时间： | 2013-12-09 |
| 修稿时间： | 2014-01-13 |
Analysis of the Continuous Rainstorm in Gannan, Gansu Province, July 2-5, 2011 |
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| Affiliation: | Ning Heping1, Han Ying2, Wang Jianbing1, Liu Honglan3 712000; ( 1Gannan Meteorologwal Bureau, 2 Hezuo Gansu 747000; Xtanyang Meteorologwal Bureau, Xlanyang Shaanxl 3Zhangye Meteorological Bureau, Zhangye Gansu 734000) |
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| Abstract: | Diagnostic analysis was applied for a continuous rainstorm event in Gannan Gansu Province, July 2-5, 2011. The results demonstrated that: this rainfall event was related with the shear on 500 hPa and location of strong convergence zone on 700 hPa. Low-level strong convergence provided a favorable dynamic condition for the occurrence and evolvement of heavy rainstorm. Through the analysis of the physical field, it was found that during this continuous rainstorm, there existed an obvious moisture layer and convergence of water vapor in low-middle layer, thereby providing adequate moisture condition for precipitation. Rising in the southwest airflow movement around the periphery of subtropical high, the water vapor and energy were transported eastward to precipitation area, which was the main cause of the continuous rainstorm event. |
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| Keywords: | convergence |
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