Karakorum temperature out of phase with hemispheric trends for the past five centuries

doi:10.1007/s00382-015-2685-z

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	Karakorum temperature out of phase with hemispheric trends for the past five centuries
	Zafar, Muhammad Usama 6; Ahmed, Moinuddin ; Rao, Mukund Palat 2; Buckley, Brendan M.; Khan, Nasrullah 1; Wahab, Muhammad 5,8; Palmer, Jonathan 7
刊名	CLIMATE DYNAMICS
	2016
卷号	46 期号:5-6
关键词	Karakorum Anomaly Temperature Dendroclimatology High Asia Glaciers
ISSN号	0930-7575
DOI	10.1007/s00382-015-2685-z
文献子类	Article
英文摘要	A systematic increase in global temperature since the industrial revolution has been attributed to anthropogenic forcing. This increase has been especially evident over the Himalayas and Central Asia and is touted as a major contributing factor for glacier mass balance declines across much of this region. However, glaciers of Pakistan's Karakorum region have shown no such decline during this time period, and in some instances have exhibited slight advance. This discrepancy, known as the 'Karakorum Anomaly', has been attributed to unusual amounts of debris covering the region's glaciers; the unique seasonality of the region's precipitation; and localized cooling resulting from increased cloudiness from monsoonal moisture. Here we present a tree-ring based reconstruction of summer (June-August) temperature from the Karakorum of North Pakistan that spans nearly five centuries (1523-2007 C.E.). The ring width indices are derived from seven collections (six-Picea smithiana and one-Pinus gerardiana) from middle-to-upper timberline sites in the northern Karakorum valleys of Gilgit and Hunza at elevations ranging from 2850 to 3300 meters above mean sea level (mean elevation 3059 m asl). The reconstruction passes all traditional calibration-verification schemes and explains 41 % of the variance of the nested Gilgit-Astore instrumental station data (Gilgit-1454 m asl, 1951-2009; Astore-2167 m asl, 1960-2013). Importantly, our results indicate that Karakorum temperature has remained decidedly out of phase with hemispheric temperature trends for at the least the past five centuries, highlighting the long-term stability of the Karakorum Anomaly, and suggesting that the region's temperature and cloudiness are contributing factors to the anomaly.
学科主题	Meteorology & Atmospheric Sciences
电子版国际标准刊号	1432-0894
出版地	NEW YORK
WOS关键词	INDIAN-SUMMER MONSOON ; CLIMATE ; VARIABILITY ; GLACIATION ; HIMALAYAS ; RAINFALL ; SIGNALS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000371069900033
资助机构	Higher Education Commission, Government of PakistanHigher Education Commission of Pakistan [20 - 1806/R, D/10. 5149.IT] ; US National Science FoundationNational Science Foundation (NSF) [AGS 13-03976, AGS 12-03818]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/24449]
专题	植被与环境变化国家重点实验室
作者单位	1.Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA 2.Rao, Mukund Palat; Buckley, Brendan M.] Columbia Univ, Lamont Doherty Earth Observ, Tree Ring Lab, Palisades, NY 10964 USA 3.Fed Urdu Univ Arts Sci & Technol, Dept Bot, Lab Dendrochronol & Plant Ecol, Gulshan E Iqbal Campus, Karachi 75300, Pakistan 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.Bahauddin Zakariya Univ, Dept Environm Sci, Multan 60000, Pakistan 6.Univ New S Wales, Climate Change Res Ctr, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia 7.Univ Swat, Ctr Plant Sci & Biodivers, Khyber Pakhtunkhwa, Pakistan 8.Univ Malakand, Dept Bot, Plant Ecol Lab, Khyber Pakhtunkhwa, Pakistan
推荐引用方式 GB/T 7714	Zafar, Muhammad Usama,Ahmed, Moinuddin,Rao, Mukund Palat,et al. Karakorum temperature out of phase with hemispheric trends for the past five centuries[J]. CLIMATE DYNAMICS,2016,46(5-6).
APA	Zafar, Muhammad Usama.,Ahmed, Moinuddin.,Rao, Mukund Palat.,Buckley, Brendan M..,Khan, Nasrullah.,...&Palmer, Jonathan.(2016).Karakorum temperature out of phase with hemispheric trends for the past five centuries.CLIMATE DYNAMICS,46(5-6).
MLA	Zafar, Muhammad Usama,et al."Karakorum temperature out of phase with hemispheric trends for the past five centuries".CLIMATE DYNAMICS 46.5-6(2016).