西北干旱区绿洲系统温湿场特征  

Characteristics of Temperature and Humidity Field of Oasis System in Northwest Arid Region

作　　者：闫一丹 YAN Yidan(Gansu Meteorological Equipment Company,Lanzhou,Gansu 730030)

机构地区：[1]甘肃省气象设备公司,甘肃兰州730030

出　　处：《农业灾害研究》2022年第12期72-74,共3页Journal of Agricultural Catastrophology

摘　　要：利用2008年6—8月甘肃省酒泉金塔绿洲地区温度和湿度气象资料,分析了该地区温度场和湿度场特征。结果表明:夏季金塔绿洲相对于沙漠戈壁地区可看成是一个冷源和湿源,即可以形成绿洲冷岛效应和湿岛效应。戈壁或沙漠地区在地面高度上的温度大于绿洲,湿度小于绿洲,在850 hPa高度上则相反;在700 hPa及以上高空表现得不是特别明显,其温度和湿度变化速率很小。绿洲冷岛效应和湿岛效应在低空和地面的表现很明显,主要是沙漠戈壁地区与绿洲下垫面的不同,以及绿洲受到水的灌溉与植被、动物和人形成局地气候系统。Based on the meteorological data of temperature and humidity in Jinta Oasis,Jiuquan,Gansu Province from June to August 2008,this paper analyzes the characteristics of temperature and humidity fields in this area.The results show that the Jinta oasis can be regarded as a cold source and a wet source relative to the desert Gobi region in summer,which can form the cold island effect and wet island effect of the oasis.The temperature at ground level in gobi or desert area is higher than that in oasis,the humidity was lower than that in oasis,and the opposite was true at 850 hPa;At 700 hPa and above,it was not particularly obvious,and its temperature and humidity change rate was very small.The cold island effect and wet island effect of the oasis are obvious at low altitude and on the ground,mainly due to the difference between the desert Gobi area and the underlying surface of the oasis,and the local climate system formed by the irrigation of the oasis and vegetation,animals and people.

关 键 词：金塔绿洲 冷岛效应 湿岛效应 相对湿度 比湿 气温 

分 类 号：P434.5[天文地球—大气科学及气象学]