西北干旱区绿洲系统小气候效应研究  

Study on Microclimate Effect of Oasis System in Northwest Arid Area

作　　者：许海芳 Xu Hai-fang(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》2023年第2期102-104,共3页Journal of Agricultural Catastrophology

摘　　要：西北干旱区绿洲具有特殊的小气候特征。以金塔绿洲为例,选用“绿洲系统非均匀下垫面能量水分交换和边界层过程观测与理论研究(2007—2010)”的“金塔高分辨率资料同化再分析产品数据资料”进行绿洲系统小气候分析,重点对绿洲与周边沙漠做平均日变化的比较,研究再现了中国西北干旱区绿洲小气候特征。结果表明:干旱区绿洲系统下垫面的非均匀性致使沙漠和绿洲受热增温幅度不同。沙漠气温日变化幅度较绿洲偏大。绿洲上空气温较周围沙漠低,湿度较沙漠大,绿洲表现出明显的冷岛、湿岛效应,这在模拟图上有很好的体现。此外,空气相对湿度的最低值出现在08:00,表现出夜间是水汽聚集过程,白天是水汽耗散过程。Oasis in northwest arid area has special microclimate characteristics.Took Jinta Oasis as an example,the“Jinta High Resolution Data Assimilation Reanalysis Product Data”of“Observation and Theoretical Research on Energy and Water Exchange and Boundary Layer Process of Heterogeneous Underlying Surface of Oasis System(2007—2010)”was selected to analyze the microclimate of the oasis system,focused on the comparison of the average daily change between the oasis and surrounding desert,and the study reproduced the characteristics of the oasis microclimate in the arid region of northwest China.The results showed that the inhomogeneity of the underlying surface of the oasis system in the arid area results in the difference in the extent of heat increase between the desert and oasis.The daily variation range of desert temperature was larger than that of oasis.The air temperature on the oasis was lower than that of the surrounding desert,and the humidity was higher than that of the desert.The oasis shows obvious cold island and wet island effects,which were well reflected in the simulation diagram.It was also found that the lowest value of air relative humidity appears at 08:00,which shows that at night it is a process of water vapor accumulation and at daytime it was a process of water vapor dissipation.

关 键 词：干旱区 金塔绿洲 WRF模式 小气候效应 

分 类 号：P458[天文地球—大气科学及气象学]