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气象:2013,39(10):1344-1349
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山东降水回波移动特征分析
(1.山东省人民政府人工影响天气办公室,济南 250031;2.山东省气象台,济南 250031)
Analysis on the Moving Characteristics of Precipitation Echoes in Shandong Province
(1.Shandong Weather Modification Office, Jinan 250031;2.Shandong Meteorological Observatory, Jinan 250031)
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投稿时间:2012-10-30    修订日期:2013-04-22
中文摘要: 利用济南新一代多普勒雷达在4年之间获取的217个观测资料,分析了回波的移动特征。主要结果为:(1)计算了回波移动速度、方向,结果表明回波移动速度在10.0~95.0 km·h-1之间,峰值在45.0~50.0 km·h-1,不同月份回波移动速度存在差别,春末(5月)、秋初(9月)回波具有较大的移动速度;回波移动方向在120°~360°之间,其中80.6%集中在210°~315°之间,回波移向比较集中在西南、西和西北方向。(2)降水过程回波的运动特征可以概括为四种形式:简单直线型、复合直线型、复杂移动型和其他类型,各种类型占的比例分别为69.6%、19.4%、25.2%和4.7%。这些研究可以为人工影响天气方案的设计和临近预报服务提供参考依据。
Abstract:Using the data observed by the new generation Doppler weather radar in 4 years, the moving characteristics of radar echo are analyzed. It is found that: (1) the echo moving speeds are between 10.0 km·h-1 to 95.0 km·h-1, and the peak value is 45.0-50.0 km·h-1. The echo moving speeds are different in different months. The radar echoes have larger movement speed in late spring (May) and early autumn (September). The echo moving directions are between 120° to 360°, of which 80.6% concentrates betweem 210°-315°, and the moving directions mainly point to southwest, west and northwest; (2) The echo motion characteristics in the precipitation process can be summarized as four types: simple linear type, composite linear type, complex moving type and other types. The proportions of these types are 69.6%, 19.4%, 25.2% and 4.7% respectively. These studies can provide references for the scheme design of weather modification and nowcasting services.
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基金项目:国家科技支撑计划项目(2006BAC12B02)、国家自然科学基金项目(41275044)和山东省气象局重点课题(2012sdqxz07)共同资助
引用文本:
王俊,龚佃利,周黎明,杨晓霞,2013.山东降水回波移动特征分析[J].气象,39(10):1344-1349.
WANG Jun,GONG Dianli,ZHOU Liming,YANG Xiaoxia,2013.Analysis on the Moving Characteristics of Precipitation Echoes in Shandong Province[J].Meteor Mon,39(10):1344-1349.