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Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (10): 3609-3617.doi: 10.13287/j.1001-9332.202110.017

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Responses of radial growth of Pinus sibirica to climate and hydrology in Altay, Xinjiang, China

HU Mao1, CHEN Feng1,2*, CHEN You-ping1   

  1. 1Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Institute of International Rivers and Eco-security, Yunnan University, Kunming 650504, China;
    2Key Laboratory of Tree-ring Physical and Chemic Research of the Chinese Meteorological Administration/Xinjiang Laboratory of Tree-ring Ecology, Institute of Desert Meteorology, Chinese Meteorological Administration, Urumqi 830002, China
  • Received:2021-04-29 Revised:2021-07-23 Online:2021-10-15 Published:2022-04-15
  • Contact: * E-mail: feng653@163.com
  • Supported by:
    National Natural Science Foundation of China (U1803341).

Abstract: Based on a standardized tree-ring width chronology established at Altay, Xinjiang, we examined the climatic and hydrological factors affecting the tree-ring width of Pinus sibirica. The results showed that the tree-ring width chronology of P. sibirica was negatively correlated with the average temperature and the average maximum temperature in May-June of current year and positively correlated with May-June PDSI and January-June precipitation. The tree-ring width chronology of P. sibirica was positively correlated with previous November runoff of the Irtysh River. The radial growth of P. sibirica was affected by temperature and precipitation, with precipitation in early stage of tree growth and temperature in summer being the key climatic factors. The study of the extreme years of chronology showed that the radial growth of P. sibirica was related to ENSO events and global large-scale circulations. By affecting the location of cyclones over Central Asia, ENSO affected water vapor transport to Altay, with consequences on the radial growth of P. sibirica.

Key words: Altay, Pinus sibirica, hydroclimatic response, ENSO