灾害学Issue(1)：128-134,7.DOI:10.3969/j.issn.1000-811X.2016.01.024
陕西 MCC 特征分析及预报与减灾对策研究
MCC Characteristic Analysis and Studies for Forecast and Disaster Reduction Measures in Shaanxi Province
摘要
Abstract
Based on satellite cloud images and conventional observation data,the characteristics of the circu-lation situation and water vapor transportation of the mesoscale convective complex (MCC)in Shaanxi are ana-lyzed.Results show that:MCC occurred in southern Shaanxi accounts for about 80 percent of Shaanxi province’s total,most of them formed in the evening to morning.200 hPa has similar circulation situation:all MCC appeared on the northeastern side of the high-pressure southward,in the warm and wet flow region on northwest side of sub-tropical high pressure;In middle and lower troposphere exist vortex or shear from Gannan to eastern Sichuan;On the ground chart,the hot low pressure in eastern Sichuan and southern Shaanxi is more stable.Cold advection which effect MCC go through eastern part of Gansu intrusion Shaanxi Province,and enhance the baroclinicity of low vortex in middle and lower troposphere and triggered convective;Cloud images feature shows:the majority of MCC formed in Shaanxi are developing and strengthened from convective cell,such MCC appeared in southern Shaanxi heavy rainfall process,with stable and less moving,north extension is not obvious characteristics;Another type of MCC is formed by convection clouds merging,developing and strengthened from new born convective cloud cluster in warm area of cold front cloud,such MCC north extension and move towards east obviously;Cloud Top Brightness Temperature (TBB)displayed:the strong precipitation of MCC in Shaanxi is at the maximum side of the TBB gra-dient,and the maximum hourly rainfall best matches the time of TBB lowest value.Above features are good refer-ence for the study of the flood and rainstorm forecast,early warning and disaster reduction service in Shaanxi.关键词
陕西/MCC/甘南低涡/高空反气旋环流/地面冷锋/云顶亮温(TBB)/预防提示Key words
Shaanxi province/MCC/Gannan vortex/high-level anticyclone/surface cold front/TBB/pre-vention tips分类
天文与地球科学引用本文复制引用
侯建忠,陈小婷,乔剑,郭大梅,胡皓..陕西 MCC 特征分析及预报与减灾对策研究[J].灾害学,2016,(1):128-134,7.基金项目
公益科研专项“西北地区复杂地形下雷暴及短时强降水预报预警关键技术研究”（GYHY201306006）；中国气象局预报员专项（CMAYBY2014－069）；陕西省气象局2013年重点科研项目 （）
