DOI: 10.1002/grl.50518
论文题名: On the parameterization of surface momentum transport via drag coefficient in low-wind conditions
作者: Zhu P. ; Furst J.
刊名: Geophysical Research Letters
ISSN: 0094-8958
EISSN: 1944-8689
出版年: 2013
卷: 40, 期: 11 起始页码: 2824
结束页码: 2828
语种: 英语
英文关键词: drag coefficient
; momentum flux
; surface layer
; turbulence
; turbulent kinetic energy
Scopus关键词: Mean wind speed
; Meteorological tower
; Momentum flux
; Momentum transports
; Subgrid scale
; Surface layers
; Turbulent kinetic energy
; Underlying surface
; Drag coefficient
; Kinetic energy
; Kinetics
; Meteorological instruments
; Momentum
; Momentum transfer
; Turbulence
; Wind effects
; Parameterization
; drag coefficient
; kinetic energy
; momentum transfer
; Monin-Obukhov theory
; parameterization
; surface layer
; turbulence
; wind velocity
英文摘要: The subgrid-scale surface momentum transport, which plays an important role in determining the exchange between the atmosphere and the underlying surface, is often parameterized in terms of the surface mean wind speed via drag coefficient (CD), a parameter that needs to be determined externally often through the Monin-Obukhov Similarity (MOS) Theory. However, some characteristics of CD derived from observations for overland conditions, particularly the substantial increase of CD with a decrease in wind speed in low-wind conditions, cannot be explained by MOS. This issue is investigated using data collected by a portable meteorological tower. By analyzing the turbulent kinetic energy budget, a novel parameterization framework for momentum fluxes is proposed. The new parameterization not only appropriately describes the observed variation of CD but also can be simplified to MOS with certain assumptions. Moreover, the effect of stability, which traditionally has to be determined empirically, can now be determined internally within the new framework. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879911563&doi=10.1002%2fgrl.50518&partnerID=40&md5=04cf83e5783367a9900d163e9e97257f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6222
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Environment, Florida International University, Miami, FL 33199, United States
Recommended Citation:
Zhu P.,Furst J.. On the parameterization of surface momentum transport via drag coefficient in low-wind conditions[J]. Geophysical Research Letters,2013-01-01,40(11).