塔克拉玛干沙漠北缘夏秋冬季地表能量平衡闭合特征  

Surface Energy Balance Closure of Summer,Autumn and Winter in the Northern Margin of Taklimakan Desert

作　　者：曹寰琦 何清[2,3] 金莉莉[2,3] 李振杰 杨兴华[2,3] 霍文[2,3] CAO Huan-qi;HE Qing;JIN Li-li;LI Zhen-jie;YANG Xing-hua;HUO Wen(College of Resources and Environmental Sciences,Xinjiang University,Urumqi 830046,Xinjiang,China;Institute Desert Meteorology,China Meteorological Administration,Ururruti 830002,Xinjiang,China;Taklirnakan Desert Atmosphere and Environment Observation and Experimental Station,Tazhong 841000,Xinjiang,China;Lincang Meteorological Office,Lincang 677099,Yunnan,China)

机构地区：[1]新疆大学资源与环境科学学院,新疆乌鲁木齐830046 [2]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [3]新疆塔克拉玛干沙漠大气环境观测试验站,新疆塔中841000 [4]云南省临沧市气象局,云南临沧677099

出　　处：《干旱区研究》2018年第4期830-839,共10页Arid Zone Research

基　　金：国家自然科学基金项目(41605008);中央级公益性科研院所基本科研业务费专项资金(IDM201505);公益性行业(气象)科研专项[GYHY(QX)201506001-14]

摘　　要：利用塔克拉玛干沙漠北缘肖塘陆—气相互作用观测站2014年7—12月的陆面通量数据,通过最小二乘法（OLS）和能量平衡比率法（EBR）研究该地区能量平衡闭合特征。结果表明：能量通量各分量均呈倒＂U＂形单峰变化趋势,除潜热通量外,均有明显的季节变化特征,表现为：夏季〉秋季〉冬季。能量平衡闭合程度：全天〉白天〉夜间,且具有逐月递减的变化趋势。地表以下5 cm处土壤热通量下的能量闭合程度明显高于地表土壤热通量下的能量闭合程度。能量闭合率在日出日落时段波动剧烈,夜间为负,且下午明显高于上午。不同天气下的能量闭合程度表现为：晴天〉阴天〉沙尘暴〉降雨。Energy balance in the terrestrial ecosystem plays an important role in regional climate and water bal- ance. In this study, the characteristics of surface energy balance were researched using the ordinary least square （OLS） method and energy balance ratio （EBR） method based on the surface flux data observed at Xiaotang land- atmospheric interation observation station in the northern marginal zone of the Taklimakan Desert during the period from July to December 2014. The results showed that, except for the latent heat flux, the daily variation curves of other energy flux components were inverted ＂U-shaped＂ and unimodal, which were characterized by seasonal varia- tion and in an order of summer 〉 autumn 〉 winter. The energy balance was in an order of whole day 〉 daytime 〉 night and in a degressive trend. The energy closure degree of 5 cm deep soil heat flux was significantly higher than that of topsoil heat flux. The energy closure ratio fluctuated sharply at the sunrise and sunset, it was negative at night, and apparently higher in the afternoon than in the morning. Under the different weather conditions, the ener- gy closure ratio was in an order of sunshine day 〉 cloudy day 〉 sandstorm dav〉 rainfall day.

关 键 词：涡动相关法 能量平衡闭合 能量平衡比率 OLS线性回归 塔克拉玛干沙漠 

分 类 号：P421.3[天文地球—大气科学及气象学]