| 山西中南部一次暴雪过程诊断分析 |
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| 引用本文： | 程玉斌,王正旺,薛博,李菊芬.山西中南部一次暴雪过程诊断分析[J].中国农学通报,2015,31(19):199-205. |
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| 作者姓名： | 程玉斌 王正旺 薛博 李菊芬 |
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| 作者单位： | 山西省长治市气象局,山西省长治市气象局,山西省长治市气象局,山西省长治市气象局 |
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| 基金项目： | 山西省科技攻关项目“基于GIS的极端气象灾害预警与评估集成系统”(20090311083)资助。 |
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| 摘 要： | 为了进一步分析山西中南部暴雪过程的形成原因，笔者利用常规和非常规气象观测与监测资料，针对2014年2月4—6日山西中南部暴雪天气过程，从高空、地面天气形势、中低层流型配置、雷达回波及物理量场的空间垂直剖面进行综合分析。结果显示：该次暴雪过程以500hPa西风槽、南支槽相继影响、地面倒槽前部东南气流的控制为背景。500hPa西风槽，700hPa西南急流与横切，850hPa东南急流为该次暴雪的中尺度有利配置。回波强度在15~30dBz，属连续均匀的稳定性降雪回波。物理量场的相对湿度在200hPa以下为大于80%的湿空气柱、对流层为一致的上升运动、高层辐散与低层辐合构成了有利于强降雪的环境条件。
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| 关 键 词： | 天水市 天水市 云量 气候要素 影响 研究 |
| 收稿时间： | 1/4/2015 12:00:00 AM |
| 修稿时间： | 4/1/2015 12:00:00 AM |
Diagnostic Analysis of a Blizzard Process in South Central Shanxi |
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| Abstract: | In order to analyze the reasons of blizzard process in central-south shanxi province, using conventional and unconventional weather observation and monitoring data, the weather process was analyzed from the sky and ground weather situation, mesoscale flow type configuration, the vertical profiles of radar echo and physical field during 4-6 February 2014,Results showed that the blizzard process was at 500 hpa westerly trough, the south trough influence, the though front trough ground southeast control as the background. 500 hpa westerly trough, the 700 hpa southwest jet and crosscutting, 850 hpa southeast jet were the blizzard mesoscale favorable configuration. Echo intensity in 15-30 dbz, belong to the stability of continuous uniform snow echo. Physical quantity of under 200 hap 80% relative humidity of wet air column, troposphere for consistent upward movement, high-level divergence and low-level convergence constituted the environmental conditions in favour of heavy snow. |
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| Keywords: | blizzard Circulation background Mesoscale systems Radar echo Physical field |
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