台风环流对远距离暴雨水汽输送影响研究  

Impacts of typhoon circulation on the water vapor transportation of remote precipitation

作　　者：李媛[1] 张泽铭[1] 高广强[1] 丛春华[2] 李瑞芬[1] 

机构地区：[1]济宁市气象局,山东济宁272000 [2]山东省气象台,山东济南250031

出　　处：《海洋气象学报》2017年第1期111-117,共7页Journal of Marine Meteorology

基　　金：山东省自然科学基金项目(ZR2013DQ009);山东省气象局青年科研基金项目(2016SDQN16)

摘　　要：利用NCEP再分析资料,结合WRF模式对2008年7月17—19日发生在山东省的台风远距离暴雨水汽输送过程进行分析。结果表明:台风环流不仅有利于低纬度西太平洋水汽输送到山东内陆地区,而且迫使来自孟加拉湾的气流强度和方向发生变化,进而对远距离降水强度和持续时间产生重大影响;台风环流对鲁东南地区的水汽贡献远大于鲁西南地区,移除台风环流能间接地增强鲁西南地区的水汽供应;台风环流使远距离降水区水汽辐合范围集中,辐合强度增强,从而增强降水强度。By using NCEP reanalysis data and WRF model, the water vapor transport process of long- range typhoon rainstorm was studied with a case in Shandong province during 17- 19 July 2008. The results show that the typhoon circulation not only provides favorable conditions for water vapor transportation from the Western Pacific Ocean to Shandong inland area, but also affects the intensity and time duration of the long-range precipitation by changing the intensity and direction of the airflow from the Bay of Bengal. The contribution of water vapor from typhoon to the southeastern Shandong is much greater than that to the southwestern Shandong. Therefore, removal of typhoon circulation can indirectly enhance the water vapor supply to the southwestern Shandong. The typhoon circulation intensifies the long-range precipitation by contracting the water vapor convergence area and intensifying the convergence.

关 键 词：台风 水汽 暴雨 数值模拟 

分 类 号：P444[天文地球—大气科学及气象学]