作者：奥银焕;吕世华;李锁锁;张宇;陈世强;尚伦宇;

机构：中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室 甘肃兰州730000,甘肃兰州730000,甘肃兰州730000,甘肃兰州730000,甘肃兰州730000,甘肃兰州730000

中文关键词：黄河上游;;高寒草甸;;热量平衡;;辐射平衡

英文关键词：the upper yellow river;high-cold meadow vegetation;heat budget;radiation budget

中文摘要：利用2005年7月17日—8月9日玛曲地气相互作用预实验观测资料,从中选取了5个资料完整的连续晴好天气,分析了黄河上游高寒草甸地区夏季小气候、地表辐射和能量平衡连续日变化特征.结果表明:在晴好天气条件下这一地区近地层动量湍流通量受风速切变控制;总辐射峰值与青藏高原北部相比略小,但比干旱半干旱区的敦煌要大;地表反照率平均值为0.17,介于河西金塔绿洲农田与沙漠观测的结果之间;能量平衡中潜热释放比感热输送显著的多;观测中也发现有较大的能量不平衡差额.获得了对这一地区夏季地表辐射、能量、反照率、能量闭合度和小气候特征的一些新认识,为今后在这一地区进一步开展深入研究提供借鉴.

英文摘要：It is very important to study the regional heat fluxes and microclimate over the upper Yellow River.In this paper,by using the land-atmosphere interaction measured data observed in Maqu pro-experiment during the period from July 17 to August 9 in 2005,five fine days with continuous and integrated data are selected,and then their characteristics of daily variations of the surface radiation budget,heat budget,and microclimate are analyzed.The analyses show that momentum eddy flux near ground surface is controlled by shear of wind on fine day.The maximum value of solar radiation is less than that in the northern Tibetan Plateau,but more than that in Dunhuang in the arid and semi-arid regions.The mean ground surface albedo is 0.217;in the middle of the observed ones in farmland and desert in Jinta oasis.As to the energy budget,the latent flux is obviously high than the sensible flux.There is a larger energy imbalance in the observation.Some new discovers are gotten about ground surface radiation,energy,albedo,energy closure ratio and microclimate characteristics over the high-cold meadow vegetation in the upper Yellow River for summer continuous fine weather.It is very important to study more in this region in the future.

[中文刊名]：冰川冻土 [出版日期]：2008-06-15 [CN]：62-1072/P [ISSN]：1000-0240

下载全文 下载CAJ阅读器