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| Karakorum temperature out of phase with hemispheric trends for the past five centuries | |
| Zafar, Muhammad Usama6; Ahmed, Moinuddin; Rao, Mukund Palat2; Buckley, Brendan M.; Khan, Nasrullah3; Wahab, Muhammad4,7; Palmer, Jonathan5 | |
| 2016 | |
| 发表期刊 | CLIMATE DYNAMICS
 |
| ISSN | 0930-7575 |
| 卷号 | 46期号:5-6页码:1943-1952 |
| 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. |
| 关键词 | Karakorum Anomaly Temperature Dendroclimatology High Asia Glaciers |
| 学科领域 | Meteorology & Atmospheric Sciences |
| DOI | 10.1007/s00382-015-2685-z |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | INDIAN-SUMMER MONSOON ; CLIMATE ; VARIABILITY ; GLACIATION ; HIMALAYAS ; RAINFALL ; SIGNALS |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| WOS记录号 | WOS:000371069900033 |
| 出版者 | SPRINGER |
| 文献子类 | Article |
| 出版地 | NEW YORK |
| EISSN | 1432-0894 |
| 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] |
| 作者邮箱 | muhammadusamazafar@gmail.com |
| 作品OA属性 | Green Published |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/25097 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Fed Urdu Univ Arts Sci & Technol, Dept Bot, Lab Dendrochronol & Plant Ecol, Gulshan E Iqbal Campus, Karachi 75300, Pakistan 2.Rao, Mukund Palat; Buckley, Brendan M.] Columbia Univ, Lamont Doherty Earth Observ, Tree Ring Lab, Palisades, NY 10964 USA 3.Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA 4.Univ Malakand, Dept Bot, Plant Ecol Lab, Khyber Pakhtunkhwa, Pakistan 5.Univ Swat, Ctr Plant Sci & Biodivers, Khyber Pakhtunkhwa, Pakistan 6.Univ New S Wales, Climate Change Res Ctr, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia 7.Bahauddin Zakariya Univ, Dept Environm Sci, Multan 60000, Pakistan 8.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
| 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):1943-1952. |
| 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),1943-1952. |
| 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):1943-1952. |
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