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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (2): 50-58.DOI: 10.7522/j.issn.1000-694X.2019.00100

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Radial growth climatic response characteristics and tree ring climate records of conifer species at south margin of Tengger Desert, China

Han Chao1,2, Xiao Shengchun1, Ding Aijun1,2, Teng Zeyu1,2   

  1. 1. Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-08-27 Revised:2019-11-20 Online:2020-03-20 Published:2020-04-26

Abstract: Based on the theory and method of dendrochronology, radial growth-climatic response characteristics and tree ring climate records of conifer species (Pinus tabulaeformis and Picea crassifolia) were discussed in the Changling Mountain, which lies at south margin of the Tengger Desert.The results showed that both species showed significant correlation with PDSI in the prior and growth season, but Pinus tabulaeformis was more susceptible to climate change, especially precipitation. Both chronologies have 4-year and 24-year cycles, which record consistent wet and dry changes in the study area. On the interdecadal scale, the chronology of both species indicates four major dry periods (1881-1885, 1890-1900, mid-1920s-early 1930s and late 1990s-early 2000s) and three major wet periods(1864-1876, around 1935, 1953-1956). Integrated wavelet analysis and regional climate warming trend, we predicted that the growth of individual plants and the development of communities of two tree species will be adversely affected, especially for Pinus tabulaeformis on the sunny slope. The tree-ring climate record reflects the regional climate change for nearly 170 years at south margin of the Tengger Desert, which provides a reference for understanding the environment evolution of the Tengger Desert in the past 100 years and desertification controlling in the desert marginal zone.

Key words: tree ring, climate response characteristics, climate change, PDSI, desertification

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