| 基于多源探测资料的一次广州局地强对流垂直结构分析 |
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| 引用本文： | 曾琳,张羽,李怀宇,李浩文,高美谭,梁之彦.基于多源探测资料的一次广州局地强对流垂直结构分析[J].热带气象学报,2023(3):348-360. |
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| 作者姓名： | 曾琳 张羽 李怀宇 李浩文 高美谭 梁之彦 |
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| 作者单位： | 广州市气象台， 广东 广州 511430 |
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| 摘 要： | 基于X波段相控阵雷达、S波段双偏振雷达、微波辐射计、风廓线雷达、毫米波云雷达等多源高时空分辨率新型遥感探测资料，对广州后汛期一次局地强对流过程的大气热力、动力及云物理结构变化特征进行了综合分析。结果表明：(1)强对流前8小时前，局地LI、CAPE、SI等对流参数就达到并远远超过了短时强降水的阈值；临近降水大气层结仍向不稳定发展，水汽条件向有利的方向发展;(2)午后局地风形成辐合，上升气流加强，近地层出现弱垂直风切变和低空急流脉动，对强对流的发生发展有一定的指示意义;(3) CINRAD/SA-D雷达CR、DBZM HT、TOPS、VIL等变化与强降水和地面大风的发展有很好的对应关系，同时低层风场观测到阵风锋特征；XPAR-D雷达更高时空分辨率的探测可清晰显示对流发展旺盛阶段的ZDR弧、KDP柱、ZDR柱、V型缺口等特征，为判断雷暴云团的发展程度和预警提供重要信息。
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| 关 键 词： | 相控阵雷达 双偏振雷达 垂直结构 局地强对流 广州 |
AN ANALYSIS OF THE VERTICAL STRUCTURE OF LOCAL STRONG CONVECTION IN GUANGZHOU BASED ON MULTI-SOURCE DETECTION DATA |
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| ZENG Lin,ZHANG Yu,LI Huaiyu,LI Haowen,GAO Meitai,LIANG Zhiyan.AN ANALYSIS OF THE VERTICAL STRUCTURE OF LOCAL STRONG CONVECTION IN GUANGZHOU BASED ON MULTI-SOURCE DETECTION DATA[J].Journal of Tropical Meteorology,2023(3):348-360. |
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| Authors: | ZENG Lin ZHANG Yu LI Huaiyu LI Haowen GAO Meitai LIANG Zhiyan |
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| Institution: | Guangzhou Meteorological Observatory, Guangzhou 511430, China |
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| Abstract: | Based on multi-source high temporal and spatial resolution new remote sensing detection data such as X-band phased array radar, S-band dual-polarization radar, microwave radiometer, wind profiler radar, millimeter-wave cloud radar, etc. Atmospheric thermal, dynamic and cloud physical structure change characteristics are comprehensively analyzed.The results are shown as follows: (1) Eight hours before strong convection, local LI, CAPE, SI and other convective parameters reached or exceeded the short-term heavy precipitation threshold. Before the precipitation approached, the atmosphere tended to be unstable, and the water vapor condition developed in a favorable direction.(2) Local winds converged in the afternoon, updraft strengthened, a weak vertical wind shear and low-level jet pulsation appeared in the near-surface layer, which were somewhat indicative for the occurrence and development of strong convection.(3) The changes of CR, DBZM HT, TOPS, and VIL of the CINRAD/SA-D had a good corresponding relationship with the development of heavy precipitation and ground wind,while, the characteristics of gust fronts were observed in the low-level wind field. The detection of XPAR-D with higher spatial and temporal resolution clearly showed the characteristics of ZDR arc, KDP column, ZDR column, and V-shaped notch in the stage of vigorous convection development provide important information for judging how well thunderstorm cloud clusters developed and their early warning. |
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| Keywords: | phased array radar dual polarization radar vertical structure strong local convection Guangzhou |
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