DOI: 10.1007/s00382-017-3868-6
Scopus记录号: 2-s2.0-85028595964
论文题名: Assessing simulated summer 10-m wind speed over China: influencing processes and sensitivities to land surface schemes
作者: Zeng X.-M. ; Wang M. ; Wang N. ; Yi X. ; Chen C. ; Zhou Z. ; Wang G. ; Zheng Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-11-12 起始页码: 4189
结束页码: 4209
语种: 英语
Scopus关键词: convection
; geostrophic flow
; hydrodynamics
; land surface
; mesoscale motion
; momentum transfer
; sensitivity analysis
; stratification
; summer
; wind velocity
; China
英文摘要: We assessed the sensitivity of 10-m wind speed to land surface schemes (LSSs) and the processes affecting wind speed in China during the summer of 2003 using the ARWv3 mesoscale model. The derived hydrodynamic equation, which directly reflects the effects of the processes that drive changes in the full wind speed, shows that the convection term CON (the advection effect) plays the smallest role; thus, the summer 10-m wind speed is largely dominated by the pressure gradient (PRE) and the diffusion (DFN) terms, and the equation shows that both terms are highly sensitive to the choice of LSS within the studied subareas (i.e., Northwest China, East China, and the Tibetan Plateau). For example, Northwest China had the largest DFN, with a PRE four times that of CON and the highest sensitivity of PRE to the choice of LSS, as indicated by a difference index value of 63%. Moreover, we suggest that two types of mechanisms, direct and indirect effects, affect the 10-m wind speed. Through their simulated surface fluxes (mainly the sensible heat flux), the different LSSs directly provide different amounts of heat to the surface air at local scales, which influences atmospheric stratification and the characteristics of downward momentum transport. Meanwhile, through the indirect effect, the LSS-induced changes in surface fluxes can significantly modify the distributions of the temperature and pressure fields in the lower atmosphere over larger scales. These changes alter the thermal and geostrophic winds, respectively, as well as the 10-m wind speed. Due to the differences in land properties and climates, the indirect effect (e.g., PRE) can be greater than the direct effect (e.g., DFN). © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109297
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: College of Hydrology and Water Resources, Hohai University, Nanjing, Jiangsu, China; Key Laboratory for Mesoscale Severe Weather of Ministry of Education, Nanjing University, Nanjing, Jiangsu, China; College of Meteorology and Oceanography, National University of Defense Technology, Nanjing, Jiangsu, China
Recommended Citation:
Zeng X.-M.,Wang M.,Wang N.,et al. Assessing simulated summer 10-m wind speed over China: influencing processes and sensitivities to land surface schemes[J]. Climate Dynamics,2018-01-01,50(2018-11-12)