Moisture variations over the past millennium characterized by Qaidam Basin tree-ring δ18OReportar como inadecuado

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Chinese Science Bulletin

, Volume 58, Issue 32, pp 3956–3961

First Online: 11 June 2013Received: 26 January 2013Accepted: 26 March 2013DOI: 10.1007-s11434-013-5913-0

Cite this article as: Wang, W., Liu, X., Xu, G. et al. Chin. Sci. Bull. 2013 58: 3956. doi:10.1007-s11434-013-5913-0


High-resolution tree-ring δO chronologies covering the last millennium, although scarce, are essential in understanding patterns of climatic changes in the northeastern region of the Qinghai-Tibetan Plateau. For this study, a tree-ring δO chronology with a temporal resolution of 3-years was developed from the long-lived Qilian juniper Sabina przewalskii Kom., extending back in time to AD 991. This long δO chronology was significantly correlated with the yearly δO in tree rings during the common period from 1800 to 2006, and was an effective proxy for relative humidity during the growing season. A low-frequency moisture pattern signified the occurrence of a slight drought during the Medieval Climate Anomaly, a marked occurrence of a wet period during the Little Ice Age, and a trend in increasing moisture levels, although lower than average, alongside the Twentieth Century warming trend. Comparisons to other hydroclimatic reconstructions indicate that this tree-ring δO chronology serves as a reliable paleo-humidity proxy for the Qaidam Basin as well as documenting details of past humidity levels in the region.

Keywordstree-ring δO moisture variation medieval climate anomaly little ice age Qaidam Basin This article is published with open access at

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Autor: WenZhi Wang - XiaoHong Liu - GuoBao Xu - XueMei Shao - DaHe Qin - WeiZhen Sun - WenLing An - XiaoMin Zeng


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