| 山西典型高温天气的环流特征与成因分析 |
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| 引用本文： | 郭媛媛,董春卿,苗爱梅,王扬,苗青.山西典型高温天气的环流特征与成因分析[J].中国农学通报,2018,34(9):90-98. |
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| 作者姓名： | 郭媛媛 董春卿 苗爱梅 王扬 苗青 |
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| 作者单位： | 山西省气象台,山西省气象台,山西省气象台,山西省气象台,山西省气象台 |
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| 基金项目： | 山西省气象局一般课题“山西夏季区域性高温中期预报方法研究”(SXKYBTQ201510015)；军工科技项目“区域数值天气预报软件系统建 设”（2015-ZG-气象-ZB63710-5062）。 |
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| 摘 要： | 本研究旨在提高对山西高温天气形成机理的认识。应用2003—2016年山西地面气象观测资料及NCEP再分析资料,对山西夏季107个区域性高温天气过程开展时空分布特征、环流形势特征等的分析研究,并利用高分辨率中尺度数值模式对典型高温个例开展数值模拟和诊断分析,探讨山西区域性高温天气形成的可能原因。结果表明:山西高温的空间分布与地形、纬度等密切相关,高温日数南部多于北部、盆地多于山地;影响山西高温的500 h Pa典型形势包括大陆暖高型、纬向环流型、西太平洋副高控制型、两槽一脊型4类,其中两槽一脊型高温天气出现的频次最高;大陆暖高影响时山西高温范围最大,西太平洋副热带高压型控制时高温强度最大。高分辨率中尺度数值模式可以较好模拟出地面最高气温的空间分布特征。进一步分析表明:非绝热加热项是大陆暖高型、西太副高型、两槽一脊型导致高温天气的主要原因,温度平流项是形成纬向环流型高温天气的主要因子。
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| 关 键 词： | 高温天气 数值模拟 成因分析 山西 |
| 收稿时间： | 2017/11/24 0:00:00 |
| 修稿时间： | 2018/3/6 0:00:00 |
Typical High Temperature Weather in Shanxi: Circulation Characteristics and Cause Analysis |
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| Abstract: | The paper aims to improve the understanding of the formation mechanism of high temperature weather in Shanxi. Based on the meteorological observation data and NCEP reanalysis data from 2003 to 2016, the circulation characteristics and the time-space distribution characteristics of 107 regional high temperature weather processes in summer in Shanxi were analyzed, and numerical experiments were carried out to simulate and diagnose the possible causes of regional high temperature weather in Shanxi. The results indicated that: the spatial distribution of high temperature weather in Shanxi was closely related to topography and latitude, and high temperature days occurred more frequently in the south than that in the north and more in the basin than that in the mountains; continental warm high type, zonal circulation type, western Pacific sub-high type, and two troughs and one ridge type were the typical circulation situation of 500 hPa for high temperature in Shanxi, and two troughs and one ridge type occurred most frequently; when controlled by the continental warm high, the high temperature space was the largest, and the high temperature intensity was the highest when controlled by the western Pacific sub-high; the high resolution mesoscale numerical model could simulate the spatial distribution characteristics of surface temperature. Further analysis showed that: the diabatic heating term was the main cause of the high temperature weather caused by continental warm high type, western
Pacific sub-high type, and two troughs and one ridge type, while the temperature advection term was the main factor for the formation of high temperature weather controlled by zonal circulation type. |
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| Keywords: | High temperature weather Numerical simulation Cause analysis Shanxi |
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