Calibrating bacterial tetraether distributions towards in situ soil temperature and application to a loess-paleosol sequence

doi:10.1016/j.quascirev.2020.106172

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	Calibrating bacterial tetraether distributions towards in situ soil temperature and application to a loess-paleosol sequence
	Wang, Huanye 1,2,3; An, Zhisheng 1,2,3; Lu, Hongxuan 1,2; Zhao, Zenghao 1; Liu, Weiguo 1,2,4
通讯作者	Wang, Huanye(wanghy@ieecas.cn) ; Liu, Weiguo(liuwg@loess.llqg.ac.cn)
	2020-03-01
发表期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
卷号	231 页码:12
摘要	Branched glycerol dialkyl glycerol tetraethers (brGDGTs) produced by soil-dwelling bacteria offer a promising tool for reconstructing terrestrial temperatures. However, in most previous studies, due to lack of soil temperature data, brGDGTs are calibrated to the air rather than the soil temperature. This may impede our understanding of the accurate response of brGDGTs to temperature, and thus affect the quantitative paleotemperature reconstruction using these lipids. Here, we investigated modern soil brGDGTs and the corresponding soil temperature across a large climatic gradient in China (mean annual soil temperature (MAST) range: -2.7 to 26.2 degrees C). The results show that the MAST is higher than the mean annual air temperature (MAAT) by 0-6 degrees C, and the difference is related to vegetation coverage. This supports the idea that vegetation can modulate MAST and points to the necessity of exploring the direct response of brGDGTs to soil temperature. Employing stepwise regression ((sr)), we developed MAST(sr) and MAAT(sr) calibrations, which improve accuracy and reduce the error compared with previous global MAAT calibrations. In Lantian loess-paleosols, the MAST(sr) calibration resulted in similar to 4 degrees C lower glacial temperatures and a similar to 10 degrees C deglacial warming comparable with other terrestrial records and climate models. However, the global MAT(mr) and MBT'/CBT calibrations produced abnormally higher glacial temperatures, while the empirical MAAT(sr) calibration overestimate MAAT during the deglacial period with low vegetation coverage. This demonstrates that the calibration with soil temperature is preferred for quantitative paleotemperature reconstruction. Nevertheless, soil brGDGTs might be useful for inferring MAAT if underlying surface conditions are sufficiently constrained. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Quaternary Paleoclimatology China Organic biomarkers brGDGTs Soil temperature Vegetation Paleotempetature reconstruction Loess-paleosol sequences
DOI	10.1016/j.quascirev.2020.106172
关键词[WOS]	DIALKYL GLYCEROL TETRAETHERS ; GROUND SURFACE-TEMPERATURE ; LAST GLACIAL MAXIMUM ; AIR-TEMPERATURE ; MEMBRANE-LIPIDS ; EAST-ASIA ; MONSOON PRECIPITATION ; CLIMATE ; VARIABILITY ; RECONSTRUCTIONS
收录类别	SCI ; SCI
语种	英语
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB40010100] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA2007020202] ; National Natural Science Foundation of China[41602183] ; Second Tibetan Plateau Scientific Expedition and Research program[2019QZKK0101] ; West Light Foundation of The Chinese Academy of Sciences ; Youth Innovation Promotion Association, CAS
WOS研究方向	Physical Geography ; Geology
项目资助者	Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research program ; West Light Foundation of The Chinese Academy of Sciences ; Youth Innovation Promotion Association, CAS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000519667900001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：41[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12617
专题	加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Wang, Huanye; Liu, Weiguo
作者单位	1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Open Studio Ocean Continental Climate & Environm, Qingdao 266061, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Huanye,An, Zhisheng,Lu, Hongxuan,et al. Calibrating bacterial tetraether distributions towards in situ soil temperature and application to a loess-paleosol sequence[J]. QUATERNARY SCIENCE REVIEWS,2020,231:12.
APA	Wang, Huanye,An, Zhisheng,Lu, Hongxuan,Zhao, Zenghao,&Liu, Weiguo.(2020).Calibrating bacterial tetraether distributions towards in situ soil temperature and application to a loess-paleosol sequence.QUATERNARY SCIENCE REVIEWS,231,12.
MLA	Wang, Huanye,et al."Calibrating bacterial tetraether distributions towards in situ soil temperature and application to a loess-paleosol sequence".QUATERNARY SCIENCE REVIEWS 231(2020):12.