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学科主题: 地理学::自然地理学
题名: Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter
作者: Chen, XL (Chen, Xuelong)1; Skerlak, B (Skerlak, Bojan)2; Rotach, MW (Rotach, Mathias W.)3; Anel, JA (Anel, Juan A.)4, 5; Su, Z (Su, Zhonbgo)1; Ma, YM (Ma, Yaoming)6, 7; Li, MS (Li, Maoshan)1, 8
通讯作者: Chen, XL
刊名: JOURNAL OF THE ATMOSPHERIC SCIENCES
发表日期: 2016
DOI: 10.1175/JAS-D-15-0148.1
卷: 73, 期:5, 页:2021-2038
收录类别: SCI
合作性质: 国际
文章类型: Article
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.
语种: 英语
WOS记录号: WOS:000375952700010
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7703
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Univ Twente, Fac Geoinformat Sci & Earth Observat, Hengelostr 99, NL-7500 AE Enschede, Netherlands
2.ETH, Inst Atmospher & Climate Sci, Zurich, Switzerland
3.Univ Innsbruck, Inst Atmospher & Cryospher Sci, A-6020 Innsbruck, Austria
4.Univ Oxford, Smith Sch Enterprise & Environm, Oxford, England
5.Univ Vigo, Fac Sci, Environm Phys Lab, Orense, Spain
6.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing, Peoples R China
7.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
8.Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Peoples R China

Recommended Citation:
Chen, XL ,Skerlak, B ,Rotach, MW ,et al. Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2016,73(5):2021-2038.
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文件名: V.73(5) 2021-2038 2016.pdf
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