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Journal of Desert Research ›› 2018, Vol. 38 ›› Issue (6): 1313-1320.DOI: 10.7522/j.issn.1000-694X.2018.00056

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Elm Tree-ring Records of Spring Mean Maximum Temperature in the Otindag Sandy Land, China

Cao Hongfang1,2, Qin Wei3, Hu Yongning4, Huang Rongfeng5, Qin Yan1, Ji Lei1, Zhang Na1,2   

  1. 1. Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, China;
    2. Graduate School of Chinese Academy of Agricultural School, Beijing 100081, China;
    3. Municipal, Road & Bridge Engineering College, Inner Mongolia Technical College of Construction, Hohhot 010070, China;
    4. Institute of Forestry Monitoring & Planning of Inner Mongolia, Hohhot 010020, China;
    5. Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2018-03-22 Revised:2018-04-27 Online:2018-11-20 Published:2018-12-05

Abstract: There is a significant negative correlation(-0.72) between the regional chronology which build by the elm tree ring cores and disks were collected from the Otindag Sandy Land in the northern part of Zhenglan County, Inner Mongolia and the April-May mean maximum temperature of Zhenglan County. Based on this correlation we set up a regression equation between the April-May mean maximum temperature and the regional chronology, and which accounts for 51.35% of the reliability for the April-May mean maximum temperature during 1960-2011. The regression equation is credible and researched a 246-year reconstruction of April-May mean maximum temperature during 1766-2011. There were five periods with significantly higher temperatures and six periods with significantly lower temperatures by analyzing the volatility characteristics of the reconstructed sequence. There are significant cycles at 2-3.5 and 33-51.28 years of the reconstruction by using the Multi-taper method. The reconstruction sequence is consistent with the fluctuation trend of the drought index reconstruction in the surrounding area, and the correlation coefficients between the reconstruction sequence and measured sequences in surrounding areas are all higher than 0.6.

Key words: tree ring width, mean maximum temperature, reconstruction, Otindag Sandy Land

CLC Number: