兰州大学机构库 >大气科学学院
Properties of a simulated convective boundary layer over inhomogeneous vegetation
Wang, Chan1; Tian, WS(田文寿)1; Parker, Douglas J.; Marsham, John H.2; Guo, Zhenhai3
2011-01
Source PublicationQUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN0035-9009
Volume137Issue:654Pages:99-117
AbstractUsing a high-resolution boundary-layer model, effects of heterogeneity over a mesoscale flat domain are investigated through a series of idealised model simulations. In these simulations two different land surface types (bare soil and vegetation) are arranged in two different patterns. It is found that the effect of heterogeneity remains significant with geostrophic winds of 10 m s(-1). However, when the geostrophic wind direction is perpendicular to the alignment of the surface heterogeneities (with alignment here defined as the direction along the edges of a sequence of surface patches), higher winds tend to weaken the coherent circulations caused by the surface heterogeneities. The vertical winds generated by the mesoscale circulations associated with the surface heterogeneities are on the order of 0.5 cm s(-1). When the geostrophic wind direction is perpendicular to the alignment of the surface heterogeneities over a three-strip surface type, the mesoscale pattern in horizontal velocity is also pronounced, with significant fluctuations at the interfaces between two different surface patches. The heights at which the heterogeneity effects on potential temperature and winds vanish are well above the convective boundary layer top and reach at least 3.3 Z(i) under light winds, but depend on the wind speed and directions as well as the orientation of surface heterogeneities. Finally, the implications of the surface heterogeneity for initiation of deep convection have been explored for a surface consisting of two-dimensional strips of alternating soil and vegetated surfaces aligned in the north-south direction. For this surface pattern, the interaction between westerly background winds and the secondary circulation sets up conditions which favour the initiation of deep convection at the eastern, downwind edge of the soil strip. Copyright (C) 2010 Royal Meteorological Society
Keywordconvective boundary layer surface inhomogeneities thermal convection heterogeneity effect
Subject AreaMeteorology & Atmospheric Sciences
PublisherWILEY
DOI10.1002/qj.724
Publication PlaceMALDEN
Indexed BySCIE ; EI
Language英语
First Inst
Funding Project国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
Project NumberNational Basic Research Program of China [2006CB400501, 2010CB428604] ; National Science Foundation of China [40730949] ; Education Ministry of China
WOS IDWOS:000287592400007
Funding OrganizationNSFC ; MOST
SubtypeArticle
EI ID20110513632871
Department[Wang, Chan;
Tian, Wenshou] Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China;
[Marsham, John H.] Univ Leeds, Sch Earth & Environm, Natl Ctr Atmospher Sci, Leeds LS2 9JT, W Yorkshire, England;
[Guo, Zhenhai] CAS, Inst Atmospher Phys, Beijing, Peoples R China
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/119223
Collection大气科学学院
Corresponding AuthorTian, Wenshou
Affiliation
1.Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China
2.Univ Leeds, Sch Earth & Environm, Natl Ctr Atmospher Sci, Leeds LS2 9JT, W Yorkshire, England
3.CAS, Inst Atmospher Phys, Beijing, Peoples R China
First Author AffilicationCollege of Atmospheric Sciences
Corresponding Author AffilicationCollege of Atmospheric Sciences
First Signature AffilicationCollege of Atmospheric Sciences
Recommended Citation
GB/T 7714
Wang, Chan,Tian, Wenshou,Parker, Douglas J.,et al. Properties of a simulated convective boundary layer over inhomogeneous vegetation[J]. QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,2011,137(654):99-117.
APA Wang, Chan,Tian, Wenshou,Parker, Douglas J.,Marsham, John H.,&Guo, Zhenhai.(2011).Properties of a simulated convective boundary layer over inhomogeneous vegetation.QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,137(654),99-117.
MLA Wang, Chan,et al."Properties of a simulated convective boundary layer over inhomogeneous vegetation".QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 137.654(2011):99-117.
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