夏季金塔边界层风、温度和湿度结构特征的初步分析

利用2004年6～7月在河西走廊金塔陆-气相互作用试验的观测资料，分析了该地区夏季夜间和中午风、温、湿的垂直结构特征，结果表明：夏季夜间，当地面风较小时，金塔绿洲高空可能为偏西风气流，夜间稳定层高度大致在100～190m。夏季中午，当低空为偏东风时，风速随高度的变化比较复杂。总的来说，存在着东风急流，急流高度在1000-4000m之间，大气边界层顶盖（即逆温层底）约在3000-3600m高度，在500-800m高度以下存在绿洲内边界层；当低空为偏北风或西北风时，高空都为偏西风或西北风气流，低空风速随高度的变化比较平缓，风速有时存在极大值，大气边界层顶盖（即逆温层底）在3500m左右，在1200m以下可能存在绿洲内边界层，绿洲内边界层高度有时会很低。

A Primary Research on the Characteristics of Wind,Temperature and Humidity in the Boundary Layer over Jinta Summer

Using the observed data of the intensive period of Land-atmosphere interaction field experiment over Jinta Oasis from June to July 2004, the characteristics of wind, temperature and humidity in the boundary layer at noon and at night are analyzed. At night of summer, the wind is blowing westerly in upper layers over Jinta Oasis when the surface wind speed is small. The stable boundary layer depth is about from 100 m to 190 m. At noon, when the wind is blowing easterly in lower layers, the easterly jet will occur and its depth varies from 1000 m to 4000 m; The bottom of inversion LID in about from 3000 m to 3600 m in height; The inner boundary layer of oasis might occur below 500-800 m in height. At noon, when the north or northwest wind is blowing in lower layers, the westerly or northwesterly wind is blowing in upper layers; the variation of wind speed with height is smaller in lower layers; The bottom of inversion LID in about 3500 m in height. The inner boundary layer of oasis might occur below 1200 m and sometimes its height might be lower.