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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (2): 619-625    DOI: 10.7522/j.issn.1000-694X.2013.00085
    
The Response of Tree-ring Growth of Picea purpurea and Picea crassifolia in South Gansu Province to Climate Change
KANG Shu-yuan, YANG Bao
Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
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Abstract  

The Lianhuashan Mountain, located in south Gansu Province of Northwest China, is sensitive to climate change. In this study, two tree-ring chronologies were established of Picea crassifolia Kom.) and P. purpurea spanning the period of 1923-2010 and 1806-2010, respectively. Here we designed a test to examine whether or not the climate factors response to tree-ring width of the two tree species varies. Using chronological statistics and correlation analysis, we tested the consistency of climate-growth response in tree-ring width series in the two tree species. Results showed that there was not significant difference between the two tree species for mean sensitivity and standard deviation, but the signal-to-noise ratio value of P. pururea was much higher than that of P. cressifolia. Analyses indicated that relationships between climate change and tree-ring growth of the two species were partially controlled by species. The climatic data included monthly mean air temperature, monthly precipitation and monthly extreme high air temperature. Monthly extreme high air temperature presented more significant results than monthly mean air temperature and monthly precipitation. Correlations between monthly extreme high air temperature and annual tree-ring width were lower for P. cressifolia than for P. pururea. Therefore, using trees to develop a tree-ring chronology for reconstructing a climate series may be less robust if the species effect is not accounted for. The two tree-ring chronologies in our study region were compared with four tree-ring chronologies of neighboring regions, and the results indicated that they had the common low values in 1920s.

Key words:  Picea crassifolia Kom.      Picea purpurea Mast.      tree-ring width      climate factors      Lianhuashan Mountain     
Received:  31 May 2012      Published:  13 July 2012
ZTFLH:  P468  
Articles by authors
KANG Shu-yuan
YANG Bao

Cite this article: 

KANG Shu-yuan, YANG Bao. The Response of Tree-ring Growth of Picea purpurea and Picea crassifolia in South Gansu Province to Climate Change. JOURNAL OF DESERT RESEARCH, 2013, 33(2): 619-625.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00085     OR     http://www.desert.ac.cn/EN/Y2013/V33/I2/619

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