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Temperature variations at Lake Qinghai on decadal scales and the possible relation to solar activities

Author:
Xu, Hai  Liu, Xiaoyan  Hou, Zhaohua  


Journal:
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS


Issue Date:
2008


Abstract(summary):

Temperature variations at Lake Qinghai, northeastern Qinghai-Tibet plateau, were reconstructed based on four high resolution temperature indicators of the delta O-18 and the delta C-13 of the bulk carbonate, total carbonate content, and the detrended delta N-15 of the organic matter. There are four obvious cold intervals during the past 600 years at Lake Qinghai, namely 1430-1470, 1650-1715 1770-1820, and 1920-1940, synchronous with those recorded in tree rings at the northeast Qinghai-Tibet plateau. The intervals of 1430-1470, 1650-1715, and 1770-1820 are consistent with the three coldest intervals of the Little Ice Age. These obvious cold intervals are also synchronous with the minimums of the sunspot numbers during the past 600 years, suggesting that solar activities may dominate temperature variations on decadal scales at the northeastern Qinghai-Tibet plateau. (c) 2007 Elsevier Ltd. All rights reserved.


Page:
138---144


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