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Pak. J. Bot., 43(5): 2469-2478, 2011.

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  Updated: 18-10-11

 

 

WINTER DROUGHT VARIATIONS BASED ON TREE-RING DATA IN GAOLIGONG MOUNTAIN, NORTHWESTERN YUNNAN, CHINA, A. D. 17952004

ZongShan Li1, 2*, Chunming Shi1, 3, Yongbo Liu1 ,  Jinlong Zhang1, Qibing Zhang1 and Keping Ma1

Abstract: We developed two tree ring-width chronologies of coniferous species (Tsuga dumosa (D.Don) Eichler and Abies georgei Orr) in Gaoligong Mountain, northwestern Yunnan, China. Although the two chronologies come from different species, significant correlation existed between the two chronologies (r = 0.528, p<0.01), and the first principal component (PC1) accounted for 75% of total variance over their common period A. D. 17952005. Using the PC1 of tree-ring chronologies, the winter (prior October to current January) PDSI for the research area was reconstructed for the past 210 years (r = 0.617, p<0.01). Wet winters occurred during A. D.18271861, 18801896 and 19221961, while dry winters were prevailed in A. D. 17951826, 18621879, 18971921 and 1962 to present. Long-term decadal drought variations of this reconstruction fitted quite close with the variations retained in drought sensitive tree-ring series of the nearby regions, and this demonstrated the new record was confidently reliable and could capture large-scale climate signals.


1State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
2
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China.
3
Laboratoire des Sciences du Climat et de l'Environnement, UMR 1572, IPSL/CEA/CNRS/UVSQ,7 Bat 701,  L'Orme des Merisiers, CEA Saclay, 91 191 Gif sur Yvette cedex.


   
   

 

   
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