globalchange  > 气候变化与战略
DOI: 10.5194/hess-24-967-2020
论文题名:
Impacts of non-ideality and the thermodynamic pressure work term p1v on the surface energy balance
作者: Massman W.J.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期:2
起始页码: 967
结束页码: 975
语种: 英语
Scopus关键词: Atmospheric thermodynamics ; Energy balance ; Interfacial energy ; Available energy ; Conductive heat flux ; Earth's surface ; Eddy covariance ; Sensible heat flux ; Thermodynamic pressure ; Turbulent energies ; Water vapor flux ; Heat flux ; atmospheric gas ; atmospheric pressure ; eddy covariance ; energy balance ; energy flux ; gas flow ; surface energy ; thermodynamics ; water vapor
英文摘要: Present-day eddy-covariance-based methods for measuring the energy and mass exchange between the earth's surface and the atmosphere often do not close the surface energy balance. Frequently the turbulent energy fluxes (sum of sensible and latent heat) underestimate the available energy (net incoming radiation minus the soil conductive heat flux) by 10 % to 20 % or more. Over the last 3 or 4 decades several reasons for this underestimation have been proposed, but nothing completely definitive has been found. This study examines the contribution of two rarely discussed aspects of atmospheric thermodynamics to this underestimation: the non-ideality of atmospheric gases and the significance the water vapor flux has for the sensible heat flux, an issue related to the pressure work term pI"v. The results were not unexpected; i.e., these effects are too small to account for all of the imbalance between the sum of the turbulent fluxes and the available energy. Together they may contribute 1 %-3 % of the difference (or 10 % to 15 % of the percentage imbalance). © 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162777
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作者单位: Massman, W.J., USDA Forest Service, Rocky Mountain Research Station, 240 West Prospect Road, Fort Collins, CO 80526, United States

Recommended Citation:
Massman W.J.. Impacts of non-ideality and the thermodynamic pressure work term p1v on the surface energy balance[J]. Hydrology and Earth System Sciences,2020-01-01,24(2)
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