Preprints
https://doi.org/10.5194/cp-2021-13
https://doi.org/10.5194/cp-2021-13

  18 Feb 2021

18 Feb 2021

Review status: a revised version of this preprint is currently under review for the journal CP.

531-year non-growth season precipitation reconstruction in the southeastern Tibetan Plateau

Maierdang Keyimu1, Zongshan Li1, Bojie Fu1, Guohua Liu1, Weiliang Chen1, Zexin Fan3, Keyan Fang4, Xiuchen Wu2, and Xiaochun Wang5 Maierdang Keyimu et al.
  • 1State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
  • 2State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
  • 3Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
  • 4Key Laboratory of Humid Subtropical Eco-Geographical Process (Ministry of Education), College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
  • 5College of Forestry, Northeast Forestry University, Harbin 150040, China

Abstract. Trees record climatic conditions during their growth, and tree-rings serve as a proxy to reveal the features of the historical climate of a region. In this study, we collected tree-ring cores of forest hemlock (Tsuga forrestii) from the northwestern Yunnan area of the southeastern Tibetan Plateau (SETP), and created a residual tree-ring width (TRW) chronology. An analysis of the relationship between tree growth and climate revealed that precipitation during the non-growth season (NGS) (from November of the previous year to February of the current year) was the most important constraining factor on the radial tree growth of forest hemlock in this region. In addition, the influence of NGS precipitation on radial tree growth was relatively uniform over time (1956–2005). Accordingly, we reconstructed the NGS precipitation over the period spanning from A.D. 1475–2005. The reconstruction accounted for 28.5 % of the actual variance during the common period 1956–2005, and the leave-one-out verification parameters indicated the reliability of the reconstruction. Based on the reconstruction, NGS was extremely dry during the years A.D. 1475, 1656, 1670, 1694, 1703, 1736, 1897, 1907, 1943, 1969, 1982, and 1999. In contrast, the NGS was extremely wet during the years A.D. 1491, 1536, 1558, 1627, 1638, 1654, 1832, 1834–1835, and 1992. Similar variations of the NGS precipitation reconstruction series and Palmer Drought Severity Index (PDSI) reconstructions from surrounding regions indicated the reliability of the reconstruction. A comparison of the reconstruction with Climate Research Unit (CRU) gridded data revealed that our reconstruction was representative of the NGS precipitation variability of a large region in the SETP.

Maierdang Keyimu et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on cp-2021-13', Yuhe Ji, 13 Mar 2021
    • AC1: 'Reply on CC1', Li Zongshan, 19 Apr 2021
  • RC1: 'Comment on cp-2021-13', Anonymous Referee #1, 16 Mar 2021
    • AC2: 'Reply on RC1', Li Zongshan, 19 Apr 2021
  • RC2: 'Comment on cp-2021-13', Anonymous Referee #2, 25 Mar 2021
    • AC3: 'Reply on RC2', Li Zongshan, 19 Apr 2021

Maierdang Keyimu et al.

Maierdang Keyimu et al.

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Short summary
We created a residual tree-ring width chronology and reconstructed non-growth season precipitation (NGSP) over the period spanning from A.D 1475–2005 in the southeastern Tibetan Plateau (SETP), China. Reconstruction model verification and similar variations of NGSP reconstruction and Palmer Drought Severity Index reconstructions from surrounding region indicated the reliability of present reconstruction. Our reconstruction was representative of the NGSP variability of a large region in the SETP.