黑河地区绿洲和戈壁小气候特征的季节变化及其对比分析

SEASONAL VARIATION OF MICROCLIMATIC CHARACTERISTICS FOR OASIS AND GOBI IN HEIFE AND THEIR COMPARATIVE ANALYSIS

本文利用黑河试验（ＨＥＩＦＥ）绿洲和戈壁的观测资料，对比分析了绿洲和戈壁的小气候特征及其季节变化。结果表明：（１）黑河地区存在较强的地方性风和局地作用。（２）夏季，绿洲和戈壁的小气候特征相差甚远，各有其特殊性。晴天白天绿洲中存在冷岛效应，临近绿洲的戈壁上观测到逆湿现象。在近地面层的能量传输中绿洲以潜热为主，戈壁以感热为主。（３）冬季，绿洲和戈壁的小气候特征相近。

In this paper, the microclimatic characteristics and their seasonal variation over Oasis and Gobi are analysed and compared by the data observed in HEIFE The results show that: (1) There are local wind and local influence in HEIFE area (2) In summer, the microclimatic characteristics over Oasis and Gobi are obviously different Some internal boundary layer phenomena observed over Oasis and Gobi There are a “cold island effect” over Oasis, and an“inverse humidity” over Gobi near Oasis in clear daytime The latent heat flux is dominant in energy balance in the surface layer in Oasis, but the sensible heat flux is dominant in Gobi (3) In winter, the microclimatic characteristics over Oasis and Gobi are almost same The sensible heat flux is dominant in energy balance in the surface layer both in Oasis and Gobi