Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau | |
Zhou, X (Zhou, Xu)1; Wang, Y (Wang, Yan)1,4; Yang, K (Yang, Kun)1,2,3 | |
刊名 | CLIMATE DYNAMICS |
2018-04-01 | |
卷号 | 50期号:2019-07-08页码:2443-2455 |
关键词 | Office Unified Model Gravity-wave-drag Anisotropic Orography Boundary-layer Climate Parameterization Parametrization Representation Flow Impact |
ISSN号 | 0930-7575 |
DOI | 10.1007/s00382-017-3677-y |
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. |
学科主题 | 地理学 |
WOS研究方向 | Meteorology & Atmospheric Sciences |
语种 | 英语 |
出版者 | SPRINGER |
WOS记录号 | WOS:000428600200008 |
内容类型 | 期刊论文 |
源URL | [http://ir.itpcas.ac.cn/handle/131C11/8691] |
专题 | 青藏高原研究所_图书馆 |
通讯作者 | Zhou, X (Zhou, Xu) |
作者单位 | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Bldg 3,Courtyard 16,Lincui Rd, Beijing 100101, Peoples R China; 2.Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing 10084, Peoples R China; 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China. |
推荐引用方式 GB/T 7714 | Zhou, X ,Wang, Y ,Yang, K . Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau[J]. CLIMATE DYNAMICS,2018,50(2019-07-08):2443-2455. |
APA | Zhou, X ,Wang, Y ,&Yang, K .(2018).Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau.CLIMATE DYNAMICS,50(2019-07-08),2443-2455. |
MLA | Zhou, X ,et al."Implementation of a turbulent orographic form drag scheme in WRF and its application to the Tibetan Plateau".CLIMATE DYNAMICS 50.2019-07-08(2018):2443-2455. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论