夏季金塔绿洲冷岛效应的数值模拟  

Numerical Simulation of Cold Island Effect in Jinta Oasis Summer

作　　者：文莉娟[1] 吕世华[1] 陈世强[1] 孟宪红[1] 鲍艳[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《高原气象》2005年第6期865-871,共7页Plateau Meteorology

基　　金：国家自然科学基金重点项目(40233035)资助

摘　　要：利用中尺度数值模式MM5对金塔绿洲2003年7月31日～8月2日的观测资料进行了模拟研究,分析了金塔绿洲的温、湿、气压、风场演变.结果表明,绿洲上白天为湿冷中心,气压场表现为低层(850 hPa)高压,高层(700 hPa)低压.受背景场影响,温、湿、气压中心偏离绿洲中心,风场向背景风的垂直向辐散.但绿洲上的感热和潜热场形状不受背景风场影响,不产生变形、偏离,同绿洲形状重合.Using the mesoscale model MM5, the oasis effect of Jinta from 31 July to 2 Augst 2003 was simulated. Pressure on 850 hPa over the oasis was high, and it was opposite on 700 hPa. The simulated results show that the centers of the temperature, humidity and pressure fields were located on the southeast side of the oasis while the oasis was colder and wetter in the real world. These characteristics were possiblly resulted by the circulation of background field and the oasis effect. Correspondingly, the wind on low levels（850 hPa） diverged from the direction of the background wind field, extending to the vertical direction of it. The surface latent heat and sensible heat fields didn＇t change their forms, and were the same the oasis＇ shape.

关 键 词：冷岛效应 金塔绿洲 MM5模式 夏季 中尺度数值模式 

分 类 号：P456.7[天文地球—大气科学及气象学]