库姆塔格沙漠春季近地面风场、温度场特征

Wind Field and Temperature Field in the Near-surface Layer in Kumtagh Desert

利用中尺度区域预报模式系统对库姆塔格沙漠及其周边地区春季近地层风场与温度场分布特征进行了模拟和分析。结果发现,受青藏高原地形影响,偏北气流向南运行在途经库姆塔格沙漠的过程中发生3个分支:①在沙漠东部气流逐渐转变为西北风吹向甘肃省;②中西部气流以较强的东北风流向塔克拉玛干沙漠;③另一部分气流继续顺势南下流入青海省。沙漠区域温度从北向南逐渐降低,在青海省的边界上出现一个低温带,然后温度又开始增加。

The characteristics of wind field and air temperature field in the near-surface layer in Kumtagh Desert and neighboring areas are simulated and analyzed by WRF(Weather Research and Forecast) model,which is a middle scale mode.Results show that the southward airflow passing Kumtagh Desert evolves into three branches due to the effect of uplifting landforms of Tibetan Plateau: northwest wind blowing to Gansu province,northeast wind blowing to Taklimakan Desert and south wind blowing to Qinghai province.The air temperature at the height of 2-m gradually decreases from north to south until the boundary of Qinghai province,and then increases.