| 溪洛渡水电站2016年初夏首场暴雨诊断分析 |
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| 引用本文： | 沈茜,马红,何娟.溪洛渡水电站2016年初夏首场暴雨诊断分析[J].高原山地气象研究,2016,36(4):17-22. |
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| 作者姓名： | 沈茜 马红 何娟 |
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| 作者单位： | 云南省昭通市气象局, 昭通 657000 |
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| 基金项目： | 云南省气象局预报员技术开发专项项目(YB201411) |
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| 摘 要： | 利用NCEP/NCAR 1°×1°再分析资料、FY-2E逐小时相当黑体温度(TBB)、自动站实时观测资料等对2016年初夏溪洛渡水电站首场暴雨进行诊断分析。结果表明:本次过程是由于西南涡生成并且移出源地引发的;700h Pa以下的水汽输送是溪洛渡坝区暴雨的水汽来源;800~600h Pa的正涡度区和垂直上升运动区对应较好,是重要的动力条件;CAPE值和Δθse(500~850)明显减小可以看成是对流性降水向稳定性降水转变的指标;当溪洛渡坝区位于TBB值≤-62℃的云罩内时降雨强度最强;近地面层弱冷空气的侵入使降雨强度更加剧烈。
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| 关 键 词： | MCC 低层水汽输送 弱冷空气 |
| 收稿时间： | 2016-10-08 |
Diagnostic Analysis of the First Rainstorm of Xiluodu Hydropower in Early Summer,2016 |
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| Institution: | Zhaotong Meteorological Bureau, Zhaotong 657000, China |
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| Abstract: | Diagnostic analysis the first rainstorm of Xiluodu hydropower in early summer,2016. The results show: This process is due to the southwest vortex generator and remove the source. The water vapor transport under 700hPa is the source of the rainfall in Xiluodu. Positive vorticity and vertical upward movement area between 800 ~ 600hPa correspond better and they are the main driving force of the rainfall. The significant reduce of CAPE and there can be viewed as unstable rainfall precipitation transition to stability. When TBB value maintained at below -52℃,rainfall intensity is strong,but when TBB value increase rapidly,rainfall intensity is significantly reduce. The weak cold air intrusion of surface-layer can make the rainfall process more intense. |
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