Modification of the land surface energy balance relationship by introducing vertical sensible heat advection and soil heat storage over the Loess Plateau
Modification of the land surface energy balance relationship by introducing vertical sensible heat advection and soil heat storage over the Loess Plateau
复制标题
引入垂直感热平流和土壤蓄热修正黄土高原地表能量平衡关系
DOI：
10.1007/s11430-011-4220-3
复制
发表时间：
2012-04
期刊：
影响因子：
--
通讯作者：
Zhao Jianhua
中科院分区：
文献类型：
--
作者：
Zhang Qiang;Li Hongyu;Zhao Jianhua
对于复杂下垫面的表面能量平衡问题所知甚少。利用黄土高原陆面过程试验（LOPEX）资料，研究黄土高原复杂下垫面地表能量平衡特征，计算土壤蓄热和垂直感热平流，分析其对地表能量不平衡的贡献，探讨地表垂直速度和温度梯度对垂直感热平流传递的影响机制。研究发现，地表垂直速度为垂直感热平流提供了必要的动力，较强的温度梯度是产生垂直感热平流的能量来源。在上升条件下，垂直感热平流对地表能量收支的影响更为明显。当能量平衡方程中加入土壤蓄热项和垂直感热平流项时，不平衡显著改善。日平均残差峰值从125.1 W m−2下降到41.5 W m−2，日平均残差绝对值从59.0 W m−2下降到26.4 W m−2，地表能量平衡封闭率从78.4%上升到94.0%。
Little is known about the surface energy balance problem for a complex underlying surface. Taking data from the Loess Plateau Land-surface Processes Experiment (LOPEX) and investigating the characteristics of the surface energy balance over a complex underlying surface, this paper calculates the soil heat storage and vertical sensible heat advection, analyzes their contributions to the surface energy imbalance, and discusses the mechanism by which the vertical velocity and temperature gradient in the surface layer affect the vertical sensible heat advection transfer. We found that the vertical velocity in the surface layer provides the necessary dynamic power for vertical sensible heat advection, and a relatively strong temperature gradient is the energy source generating vertical sensible heat advection. Under an ascending condition, the effect of vertical sensible heat advection on the surface energy budget is more obvious. It is also found that when the soil heat storage term and the vertical sensible heat advection term are added to the energy balance equation, the imbalance significantly improves. The peak of average diurnal residuals decreases from 125.1 to 41.5 W m−2, the daily average absolute value of residuals falls from 59.0 to 26.4 W m−2, and the surface energy balance closure increases from 78.4% to 94.0%.
登录
查看更多内容
DOI：
10.1175/1520-0450(2001)040
发表时间：
2001-08
期刊：
Journal of Applied Meteorology
影响因子：
--
作者：
E. Valor;V. Meneu;V. Caselles
通讯作者：
E. Valor;V. Meneu;V. Caselles
DOI：
10.1016/0266-9838(86)90039-0
发表时间：
1986-06
期刊：
Environmental Software
影响因子：
--
作者：
Pz
通讯作者：
Pz
影响因子：
6.3
作者：
Foken, T.;Wimmer, F.;Liebethal, C.
通讯作者：
Liebethal, C.
DOI：
10.1007/s11430-009-0002-6
发表时间：
2009-01
期刊：
Science in China Series D: Earth Sciences
影响因子：
--
作者：
Jianxia Guo;L. Bian;Yongjiu Dai
通讯作者：
Jianxia Guo;L. Bian;Yongjiu Dai
影响因子：
6.2
作者：
D. Cava;D. Contini;A. Donateo;P. Martano
通讯作者：
D. Cava;D. Contini;A. Donateo;P. Martano