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	Influence of the Indian Ocean Dipole on tree-ring delta O-18 of monsoonal Southeast Tibet
	Hochreuther P.; Wernicke, J.; Griessinger, J.; Molg, T.; Zhu, H. F.; Wang, L.; Brauning, A.
	2016
关键词	el-nino stable-isotopes high asia climate-change time-series plateau cellulose variability summer precipitation
英文摘要	We present a newly developed, annually resolved tree-ring cellulose delta O-18 chronology for the southeastern Tibetan Plateau (TP) from Sikkim larch (Larix griffithii), spanning between 1684 and 2012. Comparisons with local and regional climate data reveal strong positive correlations with monthly sunshine hours, temperature and daily temperature amplitude as well as strong negative correlations with relative humidity, vapor pressure, rain days per month and cloud cover of August. Relationships with local and regional tree-ring delta O-18 chronologies are stable and highly significant. Over the 20th century, we find no long-term climatic trends. This is consistent with other tree-ring delta O-18 chronologies of other tree species south of the Himalayas, but contrasts with results from isotope studies north of the Himalayas. This suggests stable macroclimatic flow patterns throughout the last centuries for the southern tree stands. In terms of large-scale climate dynamics, we find evidence of a significant 30-year wave influencing our tree-ring oxygen chronology, most probably induced by the Indian Ocean Dipole and influencing tree-ring oxygen isotope chronologies along the southeastern Himalaya and the southeastern rim of the TP. This pattern is spatially and temporarily consistent among the chronologies and has apparently strengthened during the last century. During periods of strong positive dipole mode activity, the dipole mode index shows positive correlations with the delta O-18 of tree-rings on the southeastern TP.
出处	Climatic Change
卷	137
期	1-2
页	217-230
语种	英语
ISSN号	0165-0009
DOI标识	10.1007/s10584-016-1663-8
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/42980]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Hochreuther P.,Wernicke, J.,Griessinger, J.,et al. Influence of the Indian Ocean Dipole on tree-ring delta O-18 of monsoonal Southeast Tibet. 2016.

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