Millennial changes and cooling trends in land surface warm-season temperatures during the Holocene

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外文摘要：The scarcity of proxies and calibration models for quantitatively reconstructing millennial timescale sea-sonal temperature tremendously constraints our understanding of the Holocene thermal variation and its driven mechanisms.Here,we established two global warm-season temperature models by applying deep learning neural network analysis to the branched tetraether membrane lipids originating from surface soil and lacustrine sediment bacteria.We utilized these optimal models in global well-dated lacustrine,peatland,and loess profiles covering the Holocene.All reconstructions of warm-season temperatures,consistent with climate model simulations,indicate cooling trends since the early Holocene,primarily induced by decreased solar radiation in the Northern Hemisphere due to the precession peak at the early.We further demonstrated that the membrane lipids can effectively enhance the future millennial sea-sonal temperature research,including winter temperatures,without being restricted by geographical location and sedimentary carrier.

外文关键词：

Warm-season temperatureBranched tetraether membrane lipidsHoloceneModel simulations

作者：

Yukun Zheng、Hongyan Liu、Hongya Wang、Shucheng Xie、Huan Yang、Siwen Feng、Zeyu Zhang、Wenjie Zhao、Boyi Liang

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作者单位：

College of Urban and Environmental Sciences and MOE Laboratory for Earth Surface Processes,Peking University,Beijing 100871,China

State Key Laboratory of Biogeology and Environmental Geology,School of Earth Sciences,China University of Geosciences,Wuhan 430074,China

Hubei Key Laboratory of Critical Zone Evolution,School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China

College of Forestry,Precision Forestry Key Laboratory of Beijing,Beijing Forestry University,Beijing 100083,China

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基金：

National Natural Science Foundation of China

项目编号：

42230503

出版年：

2024

DOI：

10.1016/j.scib.2024.05.008

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

年,卷(期)：2024.69(18)