农学学报2017，Vol.7Issue(12)：46-51,6.
2016年"520特大暴雨"的MCS触发机制分析及其对玉林农业影响
A Torrential Rain in Yulin in 2016:MCS Triggering Mechanism and Its Impact on Agriculture
摘要
Abstract
The paper aims to explore the premature rice crop failure, vegetable seedling rotted root, and the growth retardation of litchi and longan during young spike period caused by the torrential rain in Yulin on May 20, 2016. Based on NCEP 1° × 1° global objective analysis data, conventional meteorological data, TBB from FY2E infrared cloud and Doppler radar data, the authors analyzed the heavy rainstorm mesoscale system (MCS) and dynamic mechanism. The results showed that: (1) heavy rainstorm occurred in the"two slots and one ridge"under the large circulation background, the combination of the eastward flow and the warm and humid air flow in the northwest side of the subtropical high pressure provided a favorable circulation background for MCS;(2) the coupling of the high-level strong divergence and the low-level convergence was favorable to the vertical uplift and the occurrence of the MCS; the rainstorm occurred at the right side of the low-level jet entrance;(3) there was a clear convergence of water vapor over Yulin, providing sufficient water vapor, which allowed the MCS to maintain;(4) MCS occurred at the center of the convective cloud, i.e. the area with larger gradient of TBB. The above reasons for Yulin large-scale heavy rain weather led to heavy loss of early rice crop and other heavy agricultural disasters. This article intends to summarize the experience to better grasp the background of similar weather pattern and offer a reference for disaster prevention and mitigation.关键词
特大暴雨/中尺度对流系统MCS/触发机制Key words
Torrential Rain/MCS/Triggering Mechanism分类
天文与地球科学引用本文复制引用
林宝亭,陆秋霖,陈明璐,苏尉宣..2016年"520特大暴雨"的MCS触发机制分析及其对玉林农业影响[J].农学学报,2017,7(12):46-51,6.基金项目
广西玉林市气象局项目"多普勒雷达资料在暴雨临近预报的应用"(201603). （201603）
