青藏高原地表热通量变化及其对初夏东亚大气环流的影响

应用NCEP地面热通量资料, 研究了青藏高原地面感热、潜热的气候状况及其与初夏东亚大气环流之间的关系。发现高原地面热通量的异常将影响高原地区上空的垂直运动与辐散辐合运动, 从而引起东亚地区高度场及风场的异常。同时, 青藏高原地区地面热通量与后期东亚地区的环流变化也有密切关系, 这种关系可为预测东亚地区初夏环流异常提供有意义的指标。     

大气低频变异中的波流相互作用(阻塞形势)

文章通过对低频变异研究的历史回顾以及观测事实的诊断分析,结合预报实践中的经验,从天气、气候学的角度提出了对阻塞高压（以下简称阻高）流型形成及维持的分析和看法。文中强调了阻高上游的低槽加深东移、海温变化以及地形作用是促使阻高异常的重要因素。并从斜压（瞬变波）同阻塞流的配置关系的角度出发,研究了乌拉尔山阻高维持过程中的波与流相互作用,为从理论上进一步探讨阻高形成的机理初步奠定了基础。     

WAVE-FLOW INTERACTIONS IN THE ATMOSPHERIC LOW-FREQUENCY VARIATION OF BLOCKING PATTERN

Through a simple review of low-frequency variation of blocking pattern and diagnoses ofobservational data and combining some experience in forecast practice,we put forward somethought about the mechanism of formation and maintenance of the blocking flow pattern from thesynoptic/climatological point of view,It is emphasized that eastward moving and deepening oftroughs in the upstream of the blocking high,the SST anomalies and topography effect are themain factors of impelling the variation of the blocking high.During the maintenance of Uralblocking high wave-flow interactions are studied through disposition of baroclinic trough(transientwave)and the blocking flow.This study will offer a primary basis for the further theoretical studyon the formation mechanism of the blocking high.     

欧亚地区500百帕上纬向风特征及其与中国天气的关系

本文定义了两个指数:一个是西风极区带面积指数，另一个是西风带强度指数。发现北半球纬向环流有几个周期振荡，中国的天气与北半球西风带强度及其南北迁移有密切关系。