| 伊犁河谷汛期一场短时强降水雨滴谱特征分析 |
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| 引用本文： | 江新安,王敏仲.伊犁河谷汛期一场短时强降水雨滴谱特征分析[J].新疆气象,2015,9(5):56-61. |
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| 作者姓名： | 江新安 王敏仲 |
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| 作者单位： | 伊犁州气象局,中国气象局乌鲁木齐沙漠气象研究所 |
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| 基金项目： | 中央级公益性科研院所基本科研业务专项基金资助项目 |
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| 摘 要： | 利用常规地面、高空资料、新一代天气雷达资料、雨滴谱资料,对2012年8月3日发生在伊犁河谷的一次较大范围暴雨的天气背景、雷达回波特征和降雨微物理特征等进行深入分析。结果表明,200hPa西西伯利亚西风槽、500hPa中亚低涡和地面冷锋是这次强降雨过程的主要影响系统。河谷喇叭口地形对气流的机械挤压、东高西低地形对对流的触发、地形强迫抬升对对流和降水的增强具有重要影响。这场降水过程属于积层混合云降水,其中大面积的层状云中嵌有多个对流云团,这些云团连接在一起就构成了对流性雨带,通过对暴雨雨滴谱演变分析得出,这次暴雨主要降水由对流性云团造成,对流云团微物理结构存在明显的不均匀性,其中存在多个强降水中心,其水平尺度多维持在10km左右,持续时间维持在5分钟到10分钟之内,降水集中且雨滴数浓度较高,一般在1000m-1个以上,雨滴谱宽及分布差异很大,小于1mm粒子数浓度很高,对雨强的贡献占两成以上。
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| 关 键 词： | 伊犁河谷 暴雨 环流形势 雷达资料 雨滴谱 |
| 收稿时间： | 5/8/2014 12:00:00 AM |
| 修稿时间： | 2014/11/1 0:00:00 |
characteristics analysis of Yili River Valley in a short time strong precipitation raindrop spectrum |
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| JiangXinAn and WangMinZhong.characteristics analysis of Yili River Valley in a short time strong precipitation raindrop spectrum[J].Bimonthly of Xinjiang Meteorology,2015,9(5):56-61. |
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| Authors: | JiangXinAn and WangMinZhong |
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| Institution: | Yili Meteorological Bureau,China Meteorological Bureau of Urumqi Institute of desert |
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| Abstract: | The use of conventional ground , aerial data , a new generation of weather radar data , raindrop size distribution data . On August 3, 2012 occurred in a wide range of Ili Valley storm weather background , characteristics and rainfall radar echo microphysical characteristics of in-depth analysis . The results showed that , 200hPa West Siberia westerly trough , 500hPa Central vortex and surface cold front is the main impact of this heavy rainfall process system . Bell valley terrain on airflow mechanical compression , East West terrain trigger convection , terrain forced uplift has an important influence on the enhanced convection and precipitation . This precipitation process are laminated hybrid cloud precipitation , where large areas of stratiform clouds embedded in multiple convective clouds , these clouds are connected together constitute the convective rain bands , through the storm come Evolution of raindrop size , that the storm caused mainly by the convective cloud precipitation , convective cloud microphysical structure obvious heterogeneity which there are multiple centers of heavy precipitation , the horizontal scale multi maintained at around 10km , duration remained at five minutes to within 10 minutes , a few raindrops rainfall concentrated and high concentrations , generally above 1,000m-1 , raindrop size distribution width and very different , high concentrations of particles less than 1mm of rainfall intensity contribution accounts for more than two. |
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| Keywords: | circulation situation Radar data raindrop size distribution |
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