Reconciling East Asia's mid-Holocene temperature discrepancy through vegetation-climate feedback

Jie Chen ¹Qiong Zhang ²Zhengyao Lu ³Yanwu Duan ⁴Xianyong Cao ⁴Jianping Huang ⁵Fahu Chen⁶

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作者信息

1. Key Laboratory of Western China s Environmental Systems(Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China
2. Department of Physical Geography and Bolin Centre for Climate Research,Stockholm University,Stockholm 10691,Sweden
3. Department of Physical Geography and Ecosystem Science,Lund University,Lund 22100,Sweden
4. Group of Alpine Paleoecology and Human Adaptation(ALPHA),State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research(ITPCAS),Chinese Academy of Sciences(CAS),Beijing 100101,China
5. Collaborative Innovation Center for Western Ecological Safety,Lanzhou University,Lanzhou 730000,China
6. Key Laboratory of Western China's Environmental Systems(Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;Group of Alpine Paleoecology and Human Adaptation(ALPHA),State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research(ITPCAS),Chinese Academy of Sciences(CAS),Beijing 100101,China
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Abstract

The term"Holocene temperature conundrum"refers to the inconsistencies between proxy-based recon-structions and transient model simulations,and it challenges our understanding of global temperature evolution during the Holocene.Climate reconstructions indicate a cooling trend following the Holocene Thermal Maximum,while model simulations indicate a consistent warming trend due to ice-sheet retreat and rising greenhouse gas concentrations.Various factors,such as seasonal biases and over-looked feedback processes,have been proposed as potential causes for this discrepancy.In this study,we examined the impact of vegetation-climate feedback on the temperature anomaly patterns in East Asia during the mid-Holocene(～6 ka).By utilizing the fully coupled Earth system model EC-Earth and per-forming simulations with and without coupled dynamic vegetation,our objective was to isolate the influ-ence of vegetation changes on regional temperature patterns.Our findings reveal that vegetation-climate feedback contributed to warming across most of East Asia,resulting in spatially diverse temperature changes during the mid-Holocene and significantly improved model-data agreement.These results high-light the crucial role of vegetation-climate feedback in addressing the Holocene temperature conundrum and emphasize its importance for simulating accurate climate scenarios.

Key words

Holocene temperature conundrum/Holocene Thermal Maximum/Vegetation-climate feedback/East Asia/Paleoclimate simulations

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基金项目

National Natural Science Foundation of China(42101149)

China Postdoctoral Science Foundation(2022M711441)

Swedish Research Council(Vetenskapsr?det)(2017-04232)

Swedish Research Council(Vetenskapsr?det)(2022-03617)

Swedish Research Council(2018-05913)

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

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