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Journal of Desert Research ›› 2026, Vol. 46 ›› Issue (2): 43-52.DOI: 10.7522/j.issn.1000-694X.2025.00118

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Tree-ring based precipitation reconstruction over the past 198 years in the Hulunbuir Sandy LandNortheast China

Shuo Wen1,2(), Xiao Zhang1,2, Xiaofen Liu3, Hanzhi Li1,2, Dianxue Qiao4, Lei Ha4, Yinglin Mu4, Xiaoyan Shang1,2, Wenjian Zhou1,2, Xiaohui Yang1,2, Zhongjie Shi1,2()   

  1. 1.Research Institute of Ecological Conservation and Restoration,Chinese Academy of Forestry,Beijing 100091,China
    2.Research Institute of Desertification Studies,Chinese Academy of Forestry,Beijing 100091,China
    3.School of Landscape and Ecological Engineering,Hebei University of Engineering,Handan 056038,Hebei,China
    4.Administration of Weinahe Nature Reserve of Inner Mongolia,Ewenke Autonomous Banner 021100,Inner Mongolia,China
  • Received:2025-04-10 Revised:2025-07-14 Online:2026-03-20 Published:2026-04-13
  • Contact: Zhongjie Shi

Abstract:

Based on the ring-width chronology of Pinus sylvestris var. mongholica in the Hulunbuir sandy land, this paper analyzed the correlation between the tree radial growth and the temperature and precipitation during 1952-2018. The results showed that the highest correlation (r=0.60, P<0.01) was found between the ring-width chronology and the precipitation from August of the previous year to July of the current year. And the precipitation history was reconstructed from August of the previous year to July of the current year over the past 198 years (1821-2018) in the Hulunbuir sandy land. The reconstruction equation explained 35.73% of the variance of precipitation from August of the previous year to July of the current year in the instrumental period, and was reliable and stable by the validation using the "leave-one-out cross-validation method" and "segmentation independent test method". The precipitation over the past 198 years had experienced 5 wet-dry transition phases. The multi-taper spectrum analysis showed that the precipitation in this region has a periodicity of 5.9-6.0, 2.9 and 2.1 years over the past 198 years. Comparison with reconstructions from neighboring regions and spatial correlation analysis show that the present precipitation reconstruction sequence can better represent the precipitation changes in the study area.

Key words: tree-ring, precipitation reconstruction, Pinus sylvestris var. mongholica, Hulunbuir Sandy Land, boosted regression trees

CLC Number: