气候变化领域集成服务门户(CCPortal): Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau

CCPortal

DOI	10.1007/s00382-017-3677-y
	Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau
	Zhou, Xu; Yang, Kun; Wang, Yan
通讯作者	Zhou, X (通讯作者)
发表日期	2018
ISSN	0930-7575
EISSN	1432-0894
起始页码	2443
结束页码	2455
卷号	50 期号:7-8
英文摘要	Sub-grid-scale orographic variation (smaller than 5 km) exerts turbulent form drag on atmospheric flows and significantly retards the wind speed. The Weather Research and Forecasting model (WRF) includes a turbulent orographic form drag (TOFD) scheme that adds the drag to the surface layer. In this study, another TOFD scheme has been incorporated in WRF3.7, which exerts an exponentially decaying drag from the surface layer to upper layers. To investigate the effect of the new scheme, WRF with the old scheme and with the new one was used to simulate the climate over the complex terrain of the Tibetan Plateau from May to October 2010. The two schemes were evaluated in terms of the direct impact (on wind fields) and the indirect impact (on air temperature and precipitation). The new TOFD scheme alleviates the mean bias in the surface wind components, and clearly reduces the root mean square error (RMSEs) in seasonal mean wind speed (from 1.10 to 0.76 m s(-1)), when referring to the station observations. Furthermore, the new TOFD scheme also generally improves the simulation of wind profile, as characterized by smaller biases and RMSEs than the old one when referring to radio sounding data. Meanwhile, the simulated precipitation with the new scheme is improved, with reduced mean bias (from 1.34 to 1.12 mm day(-1)) and RMSEs, which is due to the weakening of water vapor flux at low-level atmosphere with the new scheme when crossing the Himalayan Mountains. However, the simulation of 2-m air temperature is little improved.
关键词	OFFICE UNIFIED MODEL GRAVITY-WAVE-DRAG ANISOTROPIC OROGRAPHY BOUNDARY-LAYER CLIMATE PARAMETERIZATION PARAMETRIZATION REPRESENTATION FLOW IMPACT
英文关键词	Turbulent orographic form drag; Tibetan Plateau; Complex terrain; WRF
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000428600200008
来源期刊	CLIMATE DYNAMICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259212
推荐引用方式 GB/T 7714	Zhou, Xu,Yang, Kun,Wang, Yan. Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2018,50(7-8).
APA	Zhou, Xu,Yang, Kun,&Wang, Yan.(2018).Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau.CLIMATE DYNAMICS,50(7-8).
MLA	Zhou, Xu,et al."Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau".CLIMATE DYNAMICS 50.7-8(2018).