干旱区生态环境知识资源中心(Arid): Impact of Roughness Length on WRF Simulated Land-Atmosphere Interactions Over a Hyper-Arid Region

Arid

DOI	10.1029/2020EA001165
	Impact of Roughness Length on WRF Simulated Land-Atmosphere Interactions Over a Hyper-Arid Region
	Nelli, Narendra Reddy 1; Temimi, Marouane 1; Fonseca, Ricardo Morais 1; Weston, Michael John 1; Thota, Mohana Satyanarayana 1,2; Valappil, Vineeth Krishnan 1; Branch, Oliver 3; Wulfmeyer, Volker 3; Wehbe, Youssef 1,4; Al Hosary, Taha 4; Shalaby, Abdeltawab 4; Al Shamsi, Noor 4; Al Naqbi, Hajer 4
通讯作者	Temimi, Marouane
来源期刊	EARTH AND SPACE SCIENCE
EISSN	2333-5084
出版年	2020
卷号	7 期号:6
英文摘要	The aerodynamic roughness length is a crucial parameter that controls surface variables including the horizontal wind, surface temperature, and heat fluxes. Despite its importance, in the Weather Research and Forecasting (WRF) model, this parameter is typically assigned a predefined value, mostly based on the dominant land-use type. In this work, the roughness length is first estimated from eddy-covariance measurements at Al Ain in the United Arab Emirates (UAE), a hyper-arid region, and then ingested into WRF. The estimated roughness length is in the range 1.3-2.2 mm, one order smaller than the default value used in WRF. In line with previous studies, and from WRF model simulations during the warm and cold seasons, it is concluded that, when the roughness length is decreased by an order of magnitude, the horizontal wind speed increases by up to 1 m s(-1), the surface temperature rises by up to 2.5 degrees C, and the sensible heat flux decreases by as much as 10 W m(-2). In comparison with in situ station and eddy covariance data, and when forced with the updated roughness length, WRF gives more accurate 2-m air temperature and sensible heat flux predictions. For prevailing wind speeds >6 m s(-1), the model underestimates the strength of the near-surface wind, a tendency that can be partially corrected, typically by 1-3 m s(-1), when the updated roughness length is considered. For low wind speeds (<4 m s(-1)), however, WRF generally overestimates the strength of the wind.
类型	Article
语种	英语
国家	U Arab Emirates ; India ; Germany
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000545722200002
WOS关键词	SENSITIVITY-ANALYSIS ; SURFACE-ROUGHNESS ; BOUNDARY-LAYER ; AIR-QUALITY ; PART I ; MODEL ; WIND ; PARAMETERIZATION ; TEMPERATURE ; FORECASTS
WOS类目	Astronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319483
作者单位	1.Khalifa Univ Sci & Technol, Abu Dhabi, U Arab Emirates; 2.Natl Ctr Medium Range Weather Forecasting, Noida, India; 3.Univ Hohenheim, Inst Phys & Meteorol, Stuttgart, Germany; 4.Natl Ctr Meteorol, Abu Dhabi, U Arab Emirates
推荐引用方式 GB/T 7714	Nelli, Narendra Reddy,Temimi, Marouane,Fonseca, Ricardo Morais,et al. Impact of Roughness Length on WRF Simulated Land-Atmosphere Interactions Over a Hyper-Arid Region[J],2020,7(6).
APA	Nelli, Narendra Reddy.,Temimi, Marouane.,Fonseca, Ricardo Morais.,Weston, Michael John.,Thota, Mohana Satyanarayana.,...&Al Naqbi, Hajer.(2020).Impact of Roughness Length on WRF Simulated Land-Atmosphere Interactions Over a Hyper-Arid Region.EARTH AND SPACE SCIENCE,7(6).
MLA	Nelli, Narendra Reddy,et al."Impact of Roughness Length on WRF Simulated Land-Atmosphere Interactions Over a Hyper-Arid Region".EARTH AND SPACE SCIENCE 7.6(2020).