气候变化领域集成服务门户(CCPortal): Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter

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DOI	10.1175/JAS-D-15-0148.1
	Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter
	Chen, Xuelong; Skerlak, Bojan; Rotach, Mathias W.; Anel, Juan A.; Su, Zhonbgo; Ma, Yaoming; Li, Maoshan
通讯作者	Chen, XL (通讯作者)
发表日期	2016
ISSN	0022-4928
EISSN	1520-0469
起始页码	2021
结束页码	2038
卷号	73 期号:5
英文摘要	The planetary boundary layer (PBL) over the Tibetan Plateau (with a mean elevation about 4 km above sea level) reaches an unmatched height of 9515 m above sea level. The proximity of this height to the tropopause facilitates an exchange between the stratosphere and the boundary layer. However, the underlying mechanisms responsible for this unique PBL have remained uncertain. Here, the authors explore these mechanisms and their relative importance using measurements of the PBL, the associated surface fluxes, and single-column and regional numerical simulations, as well as global reanalysis data. Results indicate that the dry conditions of both ground soil and atmosphere in late winter cannot explain the special PBL alone. Rather, the results from a single-column model demonstrate the key influence of the stability of the free atmosphere upon the growth of extremely deep PBLs over the Tibetan Plateau. Simulations with the numerical weather prediction model Consortium for Small-Scale Modelling (COSMO) exhibit good correspondence with the observed mean PBL structure and realistic turbulent kinetic energy distributions throughout the PBL. Using ERA-Interim, the authors furthermore find that weak atmospheric stability and the resultant deep PBLs are associated with higher upper-level potential vorticity (PV) values, which in turn correspond to a more southerly jet position and higher wind speeds. Upper-level PV structures and jet position thus influence the PBL development over the Tibetan Plateau.
关键词	NUMERICAL WEATHER PREDICTION LARGE-SCALE SUBSIDENCE OBSERVATIONAL EVIDENCE RESIDUAL LAYER EARLY SUMMER EVOLUTION MODEL SURFACE HEIGHT CIRCULATION
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000375952700010
来源期刊	JOURNAL OF THE ATMOSPHERIC SCIENCES
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/258858
推荐引用方式 GB/T 7714	Chen, Xuelong,Skerlak, Bojan,Rotach, Mathias W.,et al. Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter[J]. 中国科学院青藏高原研究所,2016,73(5).
APA	Chen, Xuelong.,Skerlak, Bojan.,Rotach, Mathias W..,Anel, Juan A..,Su, Zhonbgo.,...&Li, Maoshan.(2016).Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter.JOURNAL OF THE ATMOSPHERIC SCIENCES,73(5).
MLA	Chen, Xuelong,et al."Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter".JOURNAL OF THE ATMOSPHERIC SCIENCES 73.5(2016).