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学科主题: 地理学::自然地理学
题名: Spatio-temporal variability of vertical gradients of major meteorological observations around the Tibetan Plateau
作者: Guo, XY (Guo, Xiaoyu)1, 2; Wang, L (Wang, Lei)1, 3; Tian, LD (Tian, Lide)1, 3
通讯作者: Guo, XY
刊名: INTERNATIONAL JOURNAL OF CLIMATOLOGY
发表日期: 2016
DOI: 10.1002/joc.4468
卷: 36, 期:4, 页:1901-1916
收录类别: SCI
合作性质: 国内
文章类型: Article
英文摘要: The near-surface air temperature lapse rate (TLR), wind speed gradient (WSG), and precipitation gradient (PG) provide crucial parameters used in models of mountain climate and hydrology. The complex mountain terrain and vast area of the Tibetan Plateau (TP) make such factors particularly important. With daily data from 161 meteorological stations over the past 43 years (1970-2012), we analyse the spatio-temporal variations of TLRs, WSGs, and PGs over and around TP, derived using linear regression methods and dividing the study area into zones based on spatial variations. Results of this study include: (1) The observed TLR varies from -0.46 to -0.73 degrees C (100 m)(-1), with averaged TLRs of -0.60, -0.62, and -0.59 degrees C (100 m)(-1) for T-max, T-min, and T-mean, respectively. The averaged TLR is slightly less than the global mean of -0.65 degrees C (100 m)(-1). The spatial variability of TLR relates to climate conditions, wherein the TLR increases in dry conditions and in cold months (October-April), while it lessens in humid regions and during warm months (May-September). (2) The estimated annual WSG ranges from 0.07 to 0.17 m s(-1) (100 m)(-1). Monthly WSGs show a marked seasonal shift, in which higher WSGs can be explained by the high intensity of prevailing wind. (3) Positive summer PGs vary from 12.08 in the central TP to 26.14 mm (100 m)(-1) in northeastern Qinghai and the southern TP, but a reverse gradient prevails in Yunnan and parts of Sichuan Province. (4) The regional warming over TP is more evident in winter, and T-min demonstrated the most prominent warming compared with T-max and T-mean. Environments at high elevations experience more rapid changes in temperatures (T-max, T-min, and T-mean) than those at low elevations, which is especially true in winter and for T-min. Furthermore, inter-annual variation of TLRs is linked to elevation-dependent warming.
语种: 英语
WOS记录号: WOS:000372036800025
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7728
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China

Recommended Citation:
Guo, XY ,Wang, L ,Tian, LD . Spatio-temporal variability of vertical gradients of major meteorological observations around the Tibetan Plateau[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2016,36(4):1901-1916.
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