西风槽

异常高温频数偏多年，欧亚地区500hPa环流特征是中高纬度有阻塞高压存在，西风槽南压，西太平洋副热带高压位置长期偏南、偏西。

In the abnormal year , the circulation characteristics over the Eurasia Continent at the 500 hPa were the blocking high in the middle latitudes , the southward westerly trough , and the subtropical high over the western Pacific Ocean inclined westward and southward for a long time .

中纬度西风槽提供了有利于台风远距离降水的大尺度背景场。

Additionally , westerly trough provides a large-scale background that can benefit the occurring of mid-latitude rainfall .

Tim位于高空槽后，获得负涡度平流，在东部弱冷空气作用下，引起台风弱变性，并没有形成气旋，在东北地区被西风槽合并后消失，辽东半岛只出现10mm以下的降水。

Tim located in the rear of a high-level trough and obtained negative vorticity advection , with the effect of the feeble cold air from the east , only formed weak cold front in North China , and precipitation on Liaodong Peninsula was less than 10 mm .

西风槽影响下鹤壁一次连续性暴雨分析

Analysis of a Continuous Rainstorm in Hebi Influenced by Westerly Trough

一次西风槽系统的云微物理结构分析

An Analysis of the Microphysical Structure of Clouds in the Westerly Trough System

冬半年副热带南支西风槽结构和演变特征研究

The Structures and Evolutions of the Wintertime Southern Branch Trough in the Subtropical Westerlies

引发高水位的天气系统是台风和西风槽；

Typhoon and west wind trough are the weather systems leading to the high water level .

西风槽为降强水提供动力及冷暖空气，台风为强降水提供水汽。

West wind trough provided power and cold - warm air for this strong precipitation , typhoon provided vapors .

本文给出了一种在西风槽与台风间接影响共同作用下产生的强暴雨模型。

Heavy rain model which occurs under the common influence of westerly trough and typhoon is given in this paper .

副高将于西风槽通过后重新增强，并继续带领卢碧向偏西移动。

The ridge is expected to re-establish after the passage of the trough , steering LUPIT to the west again .

当台风外围系统与西风槽相互作用时往往发生暴雨突然增幅现象，造成严重灾害。

The interaction between the westerly trough and synoptic system far from typhoon constantly leads to abrupt reinforcement of rainfall and severe disaster .

台风及西风槽强度的改变将直接导致中尺度系统强度的变化，从而造成降水强度的不同。

Furthermore , intensity changes of westerly trough would directly lead to intensity changes of mesoscale systems and thus lead to different rainfall .

西风槽引发长江上中游洪水东泄通过东段；

The flood from the upstream Changjiang River induced by the west wind trough discharges eastwards passing the east part of the river ;

暴雨区上空与东北地区西风槽之间有一水平尺度近1000km的垂直环流圈。

A perpendicular circulation cell about 1000 km in horizontal scale had developed between torrential rain area and the westerly trough to the northeast .

台风与西风槽相互作用与赤道辐合带的北跳

The Relations Between the Intertropical Convergence Zone ( ITCZ ) Skipping Northward and the Interaction Between Typhoon and Westerly Trough ( TT ) Pattern

风暴完全并入西风槽后，变性后的温带气旋再次加强与平流层高位涡的向下输送有关。

After storm 's entering westerly trough , the subtropical cyclone 's reintensification was related to the high potential vortex 's downward transmission from stratosphere .

此类遥响应特征在西太平洋区域表现出与副热带高压、西风槽、阻塞高压等相关的系统的准定常经向波列。

In addition , the wave train manifests as systems related to subtropical high , westerly trough and blocking high , showing quasi-stationary meridional waves feature .

高空西风槽和南支槽及其前侧的副热带急流和低空强西南气流及准静止切变线是诱发福建省春季冰雹最主要的天气系统。

The main influencing weather systems are : upper-level westerly trough , southern branch trough , subtropical jet , strong low-level southwest jet and quasi-stationary shear line .

本文利用一维半时变双参数积云模式，对高原东部地区一次西风槽影响下的冰雹天气过程进行了数值模拟。

In this paper , the hail weather process under a westerly trough effect over the eastern Qinghai-Xizang Plateau is simulated by using one-dimensional half time-dependent two-parameterized model .

台风低压与西风槽结合及结合点位置，对鲁西南暴雨的形成均很重要。

The situation of the conjunct locus of the typhoon depression and the westerly trough is very important for the forming of the rainstorm in the southwest of Shandong province .

分析发现，这次降雹过程属典型的西北冷涡影响型，此类型降雹相对于西北气流型和西风槽型降雹具有其自身特征；

The result showed that this hail event belong to the type of northwest cold eddy influence which has its own characteristic opposite to hail of northwest air current and west wind trough .

总体上看，2004年夏季江淮流域的降雨分布较均匀，没有造成大江大河及大范围的洪涝，中高纬度典型的梅雨环流形势没有完全建立，西风槽活动频繁。

The typical Meiyu over Yangtze River and Huaihe River basins during the summer 2004 pattern did not form , whereas the active troughs in westerlies at middle latitude occurred dispersedly , hereby , no severe flooding appeared over there .

对2004年鲁西南两次台风影响造成的大~暴雨过程分析结果表明，西风槽作用下的降水，若有台风低压参与，系统均得以发展，雨势进一步加强。

We analyze the two rainstorm ~ heavy rainstorm process impacted by the typhoon from the southwest of Shandong province in 2004 , the results show that the precipitation under the function of typhoon depression and westerly trough will intensify ulteriorly .

1996年8月3～5日发生在河北省西南部的特大暴雨是在没有西风槽直接作用下由台风外围的3个中尺度对流云团造成的。

The torrential downpour happened in southwest of Hebei Province in 3-5 , August , 1996 was analyzed . It was caused by three periphery mesoscale convectional cloud clusters , which connected with Typhoon No. 9608 , and had no direct impact from the westerly trough .

指出，当西风大槽稳定在90°E附近时，西太平洋台风几乎总是西行的，对我国威胁最大；

It is noted that when a large westerly trough is staying near 90 ° E , nearly all the Western Pacific typhoons move westerly , which would be dangerous for our country .

主要影响系统为登陆台风、西风低槽和低空急流。

The main affecting systems include landfall typhoon , low-level jet stream and west trough .

南半球中高纬西风带槽脊振幅的增强和北半球副热带系统经向环流的加大是南海夏季风爆发的重要原因。

Amplification of westerlies trough and ridge in Southern Hemisphere mid-high latitude and augmentation of subtropical system meridional circulation in Northern Hemisphere are significant role of the Asian summer monsoon onset .

分析低层南海及沿海区域的暖干空气以及西风带槽线的演变，对预报强对流天气的发生有一定的参考意义。

Therefore it is helpful to the severe weather forecast to analyse the evolution of the dry and warm air in the low-level and the trough-line of the upper level westerlies over South China Sea .

西风带中槽脊的移动与发展的估计

On the estimation of movement and development of the troughs and wedges in the westerlies

春季华南在冷空气垫上空南支西风中低压槽东移时的天气过程分析

Analysis of the weather process of the eastward moving troughs in the South Branch of westerlies over the cushion of cold air in South China in spring