An Assessment of Storage Terms in the Surface Energy Balance of a Subalpine Meadow in Northwest China

编号 zgly0000700427

文献类型 期刊论文

文献题名 An Assessment of Storage Terms in the Surface Energy Balance of a Subalpine Meadow in Northwest China

母体文献 大气科学进展: 英文版 

年卷期 2011,28(3)

页码 691-698

年份 2011 

分类号 P422 S152.8 

关键词 地表能量平衡  中国西北地区  亚高山草甸  存储  评估  净辐射  大气系统  表面能量 

文摘内容 The heat storage terms in the soil-vegetation-atmosphere system may play an important role in the surface energy budget.In this paper,we evaluate the heat storage terms of a subalpine meadow based on a ficld experiment conducted in the complex terrain of the eastern Qilian Mountains of Northwest China and their impact on the closure of the surface energy balance under such non-ideal conditions.During the night, the average sum of the storage terms was -5.5 W m~(-2),which corresponded to 10.4%of net radiation.The sum of the terms became positive at 0730 LST and negative again at about 1500 LST,with a maximum value of 19 W m~(-2) observed at approximately 0830 LST.During the day,the average of the sum of the storage terms was 6.5 W m~(-2),which corresponded to 4.0%of net radiation.According to the slopes obtained when linear regression of the net radiation and partitioned fluxes was forced through the origin,there is an imbalance of 14.0%in the subalpine meadow when the storage terms are not considered in the surface energy balance.This imbalance was improved by 3.4%by calculating the sum of the storage terms.The soil heat storage flux gave the highest contribution(1.59%),while the vegetation enthalpy change and the rest of the storage terms were responsible for improvements of 1.04%and 0.77%,respectively.