西藏改则地区在东亚季风前期大气层特征
The Atmospheric Characteristics in the Early Period of East Asian Monsoon in Gaize,Tibet
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摘要: 利用JICA项目改则站第二阶段加密探空观测资料,着重揭示了该地区大气层结构的观测事实,尤其是边界层风、温、湿特征。主要结论如下:(1)该地区不论是对流层还是边界层,温度递减率都较大,白天可以接近或超过干绝热直减率,在清晨出现逆温的频率较多。(2)该地区白天近地层存在逆湿现象,近地层上部是否存在逆湿现象与天气和下垫面背景有关。(3)该地区近地层风速极值也出现在早晚时刻,白天风速较小。边界层风则随高度呈多峰值变化。Abstract: Using the second phase of the JICA project sounding data encryption in Gaize.Reveals the structure of the atmosphere in the region observing the facts.In particular, are the characteristics of boundary layer wind, temperature and wet.The main features are:(1) In the region, whether Troposphere or boundary layer.The temperature decreasing rate is major.During the day close to or exceed the dry adiabatic lapse rate.In the early morning temperature inversion occur more frequently. (2) In the region during the day there is exists Wetlands reverse phenomenon at Surface layer.It may be with the weather and surface background. (3) In the region Maximum wind speed will appear in the morning and evening, wind speed smaller in day time.Boundary layer wind as it was a high degree of multi-peak change.