东北半干旱地区辐射收支与地表能量分析——以锦州地区为例  

On Analysis of Radiation Budget and Surface Energy Balance in Semi-Arid Jinzhou Area of Northeast China——Take Jinzhou for Example

作　　者：邓世雅 赵磊 李得勤 钟若嵋 文小航 DENG Shi-ya;ZHAO Lei;LI De-qin;ZHONG Ruo-mei;WEN Xiao-hang(Electronic Experimental Center, Chengdu University of Information Technology, Chengdu 610225, China;Shenyang Meteorological Service, Shenyang 110168, China)

机构地区：[1]成都信息工程大学电子实验中心,成都610225 [2]沈阳市气象台,沈阳110168

出　　处：《西南师范大学学报（自然科学版）》2020年第9期95-105,共11页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：中国气象局沈阳大气环境研究所开放基金项目(2016SYIAE16);第二次青藏高原科学考察研究项目(2019QZKK0103).

摘　　要：本研究利用2015年锦州通量观测站实测资料,对东北半干旱地区的地表辐射收支、能量平衡、地表反照率和能量闭合度等方面进行分析,得出以下结论:锦州地区向下短波辐射、地面向上短波辐射和地面向上长波辐射有明显的日变化特征,而大气向下长波辐射没有.该地区8月午后易产生对流云,致使向下短波辐射日变化在午后有明显波动.净辐射平均积分值8月为12.7 MJ/m2,12月为-0.9 MJ/m2,冬季全天均由土壤向地表传递能量,所以夏季盈余的能量可能储存到深层土壤,在冬季释放.感热和潜热随净辐射有相同的增减趋势,日变化并不平滑,有多个峰值.平均地表反照率12月(0.21)明显高于8月(0.18).受不同天气条件影响,在不同季节,各辐射分量的日变化特征不同.降水通过改变土壤湿度会对感热、潜热和地表反照率产生影响.采用过原点和有截距两种不同的拟合方法来评估锦州冬夏的能量闭合度,对比结果发现,冬季能量闭合度均远低于夏季.In this paper,the measured data of Jinzhou Flux Observatory in 2015 has been used to analyze the surface radiation budget,energy balance,surface albedo and energy closure in the semi-arid area of Northeast China.The following conclusions are drawn:the downward short wave radiation,the upward short wave radiation and the upward long wave radiation in Jinzhou area have obvious daily variation characteristics,while the downward long wave radiation of the atmosphere does not.The region is prone to convective clouds in the afternoon in August,which causes the diurnal variation of downward shortwave radiation to fluctuate significantly in the afternoon.The average integral value of net radiation is 12.7 MJ/m2 in August and-0.9 MJ/m2 in December.The energy is transferred from soil to the surface throughout the winter,so the energy of summer surplus may be stored in deep soil and released in winter.The sensible heat and latent heat flux have the same increase and decrease trend with the net radiation,the daily change is not smooth,and there are multiple peaks.The average surface albedo was significantly higher in December(0.21)than in August(0.18).Affected by different weather conditions,the daily variation characteristics of each radiation component are different in different seasons.Precipitation affects sensible heat,latent heat,and surface albedo by changing soil moisture.The energy closure of winter and summer in Jinzhou was evaluated by two different fitting methods:cross-origin and intercept.The results showed that the energy closure in winter is much lower than that in summer.

关 键 词：半干旱区 辐射收支 能量平衡 能量闭合度 

分 类 号：P422.4[天文地球—大气科学及气象学]