DOI: 10.5194/tc-11-1487-2017
Scopus记录号: 2-s2.0-85021625246
论文题名: Complex principal component analysis of mass balance changes on the Qinghai-Tibetan Plateau
作者: Zhan J ; , Shi H ; , Wang Y ; , Yao Y
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 3 起始页码: 1487
结束页码: 1499
语种: 英语
英文关键词: climate change
; confidence interval
; El Nino
; glacier mass balance
; GRACE
; La Nina
; mass balance
; principal component analysis
; satellite data
; shrinkage
; westerly
; China
; Himalayas
; India
; Karakoram
; Pamirs
; Qinghai-Xizang Plateau
英文摘要: Climatic time series for Qinghai-Tibetan Plateau locations are rare. Although glacier shrinkage is well described, the relationship between mass balance and climatic variation is less clear. We studied the effect of climate changes on mass balance by analyzing the complex principal components of mass changes during 2003-2015 using Gravity Recovery and Climate Experiment satellite data. Mass change in the eastern Himalayas, Karakoram, Pamirs, and northwestern India was most sensitive to variation in the first principal component, which explained 54ĝ€% of the change. Correlation analysis showed that the first principal component is related to the Indian monsoon and the correlation coefficient is 0.83. Mass change on the eastern Qinghai plateau, eastern Himalayas-Qiangtang Plateau-Pamirs area and northwestern India was most sensitive to variation of the second major factor, which explained 16ĝ€% of the variation. The second major component is associated with El Niño; the correlation coefficient was 0.30 and this exceeded the 95ĝ€% confidence interval of 0.17. Mass change on the western and northwestern Qinghai-Tibetan Plateau was most sensitive to the variation of its third major component, responsible for 6ĝ€% of mass balance change. The third component may be associated with climate change from the westerlies and La Niña. The third component and El Niño have similar signals of 6.5 year periods and opposite phases. We conclude that El Niño now has the second largest effect on mass balance change of this region, which differs from the traditional view that the westerlies are the second largest factor. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75538
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zhan J,, Shi H,, Wang Y,et al. Complex principal component analysis of mass balance changes on the Qinghai-Tibetan Plateau[J]. Cryosphere,2017-01-01,11(3)