| 成县2013年6月19～21日暴雨-大暴雨成因分析 |
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| 引用本文： | 陈剑雄,吴朝霞,许育良.成县2013年6月19～21日暴雨-大暴雨成因分析[J].安徽农业科学,2013(36):13961-13963,13967. |
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| 作者姓名： | 陈剑雄 吴朝霞 许育良 |
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| 作者单位： | 甘肃省成县气象局,甘肃成县,742500;甘肃省陇南市气象台,甘肃陇南74600 |
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| 基金项目： | 甘肃省气象局自然科学基金项目“陇南暴雨和山洪地质灾害气象风险预警系统研究”. |
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| 摘 要： | 利用成县气象站地面资料和卫星云图等资料,对2013年6月19 ～21日成县暴雨-大暴雨过程的成因进行分析.结果表明,700 ～ 500 hPa西太平洋副热带高压在我国大陆地区反复西伸北抬东退,持续地引导孟加拉湾西南暖湿气流沿横断山脉北上,在青藏高原低值区形成冷暖空气的交替汇集;当缓慢东移南下的乌山槽底部较强冷空气到达青藏高原东部时,形成的不稳定能量开始释放,强降水过程开始;地面要素表现为持续数日的高湿（水汽压在22 hPa以上）、高温（气温在25℃左右徘徊）、低压（气压低于894 hPa）.
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| 关 键 词： | 成县 暴雨 成因分析 |
Cause Analysis for a Rainstorm during June 19-21th in 2013 in Chengxian |
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| Institution: | CHEN Jian-xiong( 1.Chengxian Meteorological Bureau, Chengxian, Gansu 742500;) |
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| Abstract: | By using Chengxian Meteorological Station ground data and satellite cloud image,the causes for a rainstorm during June 19-20th,2013 were analyzed.The results showed that the 700-500hpa subtropical high over the West in China mainland and North carried back East,continue to guide the southwest warm wet flow northward along the Transantarctic Mountains,in the Qinghai Tibet plateau low value alternation collecting area of formation of cold air.When slowly eastward south of Osan groove at the bottom of a strong cold air to the east of Qinghai Tibet Plateau,the formation of unstable energy to release,the strong precipitation process started.The ground elements performance for the days of high humidity （water vapor pressure above 22hpa）,temperature （temperature hovers at about 25 ℃）,low pressure （pressure less than 894hpa）. |
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| Keywords: | Chengxian Rainstorm Cause analysis |
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