首页|期刊导航|大气和海洋科学快报（英文版）|Potential vorticity analysis of quasi-biweekly rainfall events over the Yangtze Basin in summer 2014
大气和海洋科学快报（英文版）2021，Vol.14Issue(6)：20-27,8.
Potential vorticity analysis of quasi-biweekly rainfall events over the Yangtze Basin in summer 2014
Potential vorticity analysis of quasi-biweekly rainfall events over the Yangtze Basin in summer 2014
摘要
Abstract
2014年夏季长江流域(YRV)发生的多次阶段性强降水事件显著地受10-20天准双周振荡所调控.代表性振荡过程与合成分析表明,准双周湿位相主要取决于对流层高层南侵的高位势涡度(PV)与低纬度向西南平流的高PV导致南亚高压形态改变而产生的YRV高空辐散.高空向南的正PV平流与低层南风输送的负PV平流在YRV上空形成正的PV平流垂直梯度,激发出等熵面位移的上升运动分量;高空的高PV同时向中低层伸展,导致等熵面坡度增大从而增强气块沿等熵面上滑的上升运动分量,由此产生更强的非绝热有关的上升运动分量.干位相情况则相反.关键词
准双周振荡/长江流域夏季降水/位势涡度/垂直运动Key words
Quasi-biweekly oscillation/Summer Yangtze rainfall/Potential vorticity/Vertical motion引用本文复制引用
Chang Tang,Xiaofei Wu,Guanshun Zhang,Jiangyu Mao..Potential vorticity analysis of quasi-biweekly rainfall events over the Yangtze Basin in summer 2014[J].大气和海洋科学快报（英文版）,2021,14(6):20-27,8.基金项目
This research was jointly supported by the Strategic Priority Re-search Program of the Chinese Academy of Sciences[grant number XDB40000000],the National Key Research and Development Program of China[grant number 2018YFC1506004],and the National Natural Science Foundation of China[grant numbers 41730963 and 41876020]. （）
