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Nat Commun. 2019 Apr 29;10(1):1958. doi: 10.1038/s41467-019-09978-1.

800-kyr land temperature variations modulated by vegetation changes on Chinese Loess Plateau.

Lu H1,2, Liu W3,4, Yang H5, Wang H1,2, Liu Z6, Leng Q7, Sun Y1,2, Zhou W1,2, An Z1,2.

Author information

1
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 710061, Xi'an, China.
2
CAS Center for Excellence in Quaternary Science and Global Change, 710061, Xi'an, China.
3
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 710061, Xi'an, China. liuwg@loess.llqg.ac.cn.
4
CAS Center for Excellence in Quaternary Science and Global Change, 710061, Xi'an, China. liuwg@loess.llqg.ac.cn.
5
Laboratory for Terrestrial Environments, Department of Science and Technology, College of Arts and Sciences, Bryant University, Smithfield, RI, 02917, USA. hyang@bryant.edu.
6
Department of Earth Sciences, The University of Hong Kong, Hong Kong, China.
7
Laboratory for Terrestrial Environments, Department of Science and Technology, College of Arts and Sciences, Bryant University, Smithfield, RI, 02917, USA.

Abstract

The complicity of long-term land surface temperature (LST) changes has been under investigated and less understood, hindering our understanding of the history and mechanism of terrestrial climate change. Here, we report the longest (800 thousand years) LSTs based on distributions of soil fossil bacterial glycerol dialkyl glycerol tetraethers preserved in well-dated loess-paleosol sequences at the center of the Chinese Loess Plateau. We have found a previously-unrecognized increasing early and prolonged warming pattern toward the northwestern plateau at the onset of the past seven deglaciations, corresponding to the decrease in vegetation coverage, suggesting underlying surface vegetation or lack of has played an important role in regulating LSTs, superimposed on the fundamental global glacial-interglacial changes. Our results support that LSTs in semi-humid and semi-arid regions with little vegetation will be more sensitive to the anticipated global temperature rise, while improving vegetation coverage would reduce LSTs and thus ecological impacts.

PMID:
31036861
PMCID:
PMC6488643
DOI:
10.1038/s41467-019-09978-1
[Indexed for MEDLINE]
Free PMC Article

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