01 Nov 2022
01 Nov 2022
Status: this preprint is currently under review for the journal CP.

A comparison of pre-Millennium eruption (946 AD) and modern temperatures from tree rings in the Changbai Mountain, northeast Asia

Haibo Du1, Michael C. Stambaugh2, J. Julio Camarero3, Mai-He Li1,4, Dapao Yu5, Shengwei Zong1, Hong S. He2, and Zhengfang Wu1 Haibo Du et al.
  • 1Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China
  • 2School of Natural Resources, University of Missouri, Columbia, Missouri, USA
  • 3Instituto Pirenaico de Ecología, IPE-CSIC, 50059 Zaragoza, Spain
  • 4Swiss Federal Institute for Forest, Snow and Landscape Research WSL, 8903 Birmensdorf, Switzerland
  • 5CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China

Abstract. High-resolution temperature reconstructions in the prior millennium are limited in northeast Asia, but important for assessing regional climate dynamics. Here, we present, for the first time, a reconstruction of April temperature for ~300 years before the Millennium volcanic eruption in 946 AD, using tree rings of carbonized logs buried in the tephra in Changbai Mountain, northeast Asia. The reconstructed temperature changes were consistent with previous reconstructions in China and Northern Hemisphere. The influences of large-scale oscillations (e.g., El Niño-Southern Oscillation) on temperature variability were not significantly different between the period preceding the eruption and that of the last ~170 years. However, compared to the paleotemperature of the prior millennium, the temperature changes were more complex with stronger temperature fluctuations, more frequent temperature abruptions, and a weaker periodicity of temperature variance during the last one and half centuries. These recent changes correspond to long-term anthropogenic influences on regional climate.

Haibo Du et al.

Status: open (until 04 Jan 2023)

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Haibo Du et al.


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Short summary
We reconstruct, for the first time, high-resolution temperatures prior to the Millennium eruption (946 AD) using a unique tree-ring proxy dataset in Changbai Mt., and compare them with modern temperatures. The temperatures during the last one and half centuries have stronger fluctuations, more frequent abruptions, and a weaker periodicity of temperature variance compared to the pre-Millennium temperatures. These recent changes correspond to long-term anthropogenic influences on regional climate.