气候变化领域集成服务门户(CCPortal): Spatio-temporal variability of vertical gradients of major meteorological observations around the Tibetan Plateau

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DOI	10.1002/joc.4468
	Spatio-temporal variability of vertical gradients of major meteorological observations around the Tibetan Plateau
	Guo, Xiaoyu; Wang, Lei; Tian, Lide
通讯作者	Guo, XY (通讯作者)
发表日期	2016
ISSN	0899-8418
EISSN	1097-0088
起始页码	1901
结束页码	1916
卷号	36 期号:4
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.
关键词	TEMPERATURE LAPSE RATES GLACIER MASS-BALANCE SPATIAL INTERPOLATION SURFACE TEMPERATURE HYDROLOGICAL MODEL AIR TEMPERATURES PRECIPITATION NORTHERN CHINA TERRAIN
英文关键词	temperature lapse rate; wind speed gradient; precipitation gradient; Tibetan Plateau; spatio-temporal variability; elevation-dependent warming
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000372036800025
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
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/258694
推荐引用方式 GB/T 7714	Guo, Xiaoyu,Wang, Lei,Tian, Lide. Spatio-temporal variability of vertical gradients of major meteorological observations around the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2016,36(4).
APA	Guo, Xiaoyu,Wang, Lei,&Tian, Lide.(2016).Spatio-temporal variability of vertical gradients of major meteorological observations around the Tibetan Plateau.INTERNATIONAL JOURNAL OF CLIMATOLOGY,36(4).
MLA	Guo, Xiaoyu,et al."Spatio-temporal variability of vertical gradients of major meteorological observations around the Tibetan Plateau".INTERNATIONAL JOURNAL OF CLIMATOLOGY 36.4(2016).