气候变化领域集成服务门户(CCPortal): Importance of the resolution of surface topography vis-à-vis atmospheric and surface processes in the simulation of the climate of Himalaya-Tibet highland

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DOI	10.1007/s00382-018-4411-0
	Importance of the resolution of surface topography vis-à-vis atmospheric and surface processes in the simulation of the climate of Himalaya-Tibet highland
	Jain S.; Mishra S.K.; Salunke P.; Sahany S.
发表日期	2019
ISSN	0930-7575
起始页码	4735
结束页码	4748
卷号	52 期号:2020-07-08
英文摘要	As Himalaya-Tibet Highland (HTH), a spatially extensive and complex terrain, plays influential roles in the regional and global climate, its representation in climate models is a decisive factor in climate simulations. It is established that higher spatial resolution improves the simulation of several seasonal mean features over this region, but how much improvement comes from the better representation of surface topography and how much comes from the better modeling of the atmospheric and surface processes are still not clear. To understand this, three sets of 6-member ensemble simulations are conducted using the NCAR Community Atmosphere Model version 5.1 (CAM5.1) at: (1) 1.9° × 2.5° resolution (Coarse), (2) 0.47° × 0.63° resolution (Fine), and (3) topography is prescribed at the Coarse resolution and rest of the model processes are computed at the Fine resolution (Hybrid). The Coarse resolution overlooks most of the intricate features of the topography with a severe bias of ~ 1–2 km but Fine resolution does a much better job in their representations. Surface air temperatures are found to be strongly dependent on the resolution of topography and therefore it is desirable to resolve topography in models for the realistic simulation and projection of temperatures. Rest of the variables, viz. seasonal mean, seasonal cycle and probability distribution of precipitation; tropospheric temperature and moisture; Tibetan anticyclone, show remarkable improvements with the increase in resolution of the atmospheric and surface processes. Influence of the resolution of topography is found to be limited to the model levels adjacent to the surface, and for higher model levels, the resolution of the atmospheric and surface processes is noted to play a more crucial role. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Climate modeling; Himalaya Tibetan Plateau (HTP); Monsoon modeling; NCAR-CAM; Resolution; Topography
语种	英语
scopus关键词	anticyclone; climate modeling; computer simulation; ensemble forecasting; monsoon; seasonal variation; spatial resolution; topography; China; Himalayas; Qinghai-Xizang Plateau
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146390
作者单位	Centre for Atmospheric Sciences, Indian Institute of Technology Delhi (IIT Delhi), New Delhi, 110016, India
推荐引用方式 GB/T 7714	Jain S.,Mishra S.K.,Salunke P.,et al. Importance of the resolution of surface topography vis-à-vis atmospheric and surface processes in the simulation of the climate of Himalaya-Tibet highland[J],2019,52(2020-07-08).
APA	Jain S.,Mishra S.K.,Salunke P.,&Sahany S..(2019).Importance of the resolution of surface topography vis-à-vis atmospheric and surface processes in the simulation of the climate of Himalaya-Tibet highland.Climate Dynamics,52(2020-07-08).
MLA	Jain S.,et al."Importance of the resolution of surface topography vis-à-vis atmospheric and surface processes in the simulation of the climate of Himalaya-Tibet highland".Climate Dynamics 52.2020-07-08(2019).