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Continuous measurements in North China and culture experiments reveal the potential of leaf n-alkane carbon isotopes in paleoclimate studies

文献类型：期刊论文

作者Shi, Minrui3; Wang, Guoan3; Guo, Zhengtang2; Han, Jiamao2; Dong, Wanlin1; Liu, Jinzhao4; Han, Yaowen3
刊名GLOBAL AND PLANETARY CHANGE
出版日期2023-09-01
卷号228页码:12
关键词Leaf n-alkane carbon isotopes (delta C-13(alk)) Long-term investigation Coefficient of delta(13)Calk vs. precipitation Paleoprecipitation reconstruction Reconstruction of pCO(2) at PETM
ISSN号0921-8181
DOI10.1016/j.gloplacha.2023.104206
英文摘要Interpreting the climate information recorded by leaf n-alkane carbon isotopes (delta 13C(alk)) in geological sediments facilitates climate prediction. However, this interpretation relies on the calibration of modern plant delta 13C(alk) responses to climate change. Here, we present the first continuous calibration at the same place next to a meteorological station, which excludes errors in the commonly used spatial calibrations along environmental gradients, resulting in robust calibrations. delta 13C(alk) was negatively related to precipitation but not temperature. delta C-13(29) was most related to precipitation, followed by delta C-13(27-33) (i.e., the mean delta C-13 from n-C-27 to n-C-33), delta C-13(27), delta C-13(31), and delta C-13(33). If delta C-13(alk) was only corrected for changes in delta(1)3C of atmospheric CO2 (delta C-13(atm)), the coefficients of delta C-13(alk) vs. annual precipitation were 0.0048 parts per thousand/mm, 0.0035 parts per thousand/mm, and 0.0033 parts per thousand/mm for delta C-13(27), delta C-13(29), and delta C-13(27-33), respectively. If correcting for changes in both delta C-13(atm) and atmospheric CO2 concentration to delta 13C(alk), the coefficients of delta 13C(alk) vs. annual precipitation were 0.0038 parts per thousand/mm, 0.0025 parts per thousand/mm, and 0.0023 parts per thousand/mm for delta C-13(27), delta C-13(29), and delta C-13(27-33), respectively. Furthermore, we provided evidence for this relationship using a greenhouse study wherein water availability explained 97% of delta 13C(alk) variance. Therefore, delta C-13(alk) is a good indicator of precipitation, especially delta C-13(29). Finally, we conducted a reconstruction of pCO(2) levels during the late Paleocene (pCO(2(initial))) and the height of the carbon isotope excursion (CIE) (pCO(2) (excursion)) at the Paleocene-Eocene Thermal Maximum (PETM) by coupling the coefficients with other geological indicators. In the scenario where methane hydrates might have been the primary carbon source responsible for PETM warming, the estimated pCO(2(initial)) and pCO(2( excursion)) were 201-275 ppm and 911-985 ppm, respectively; whereas, in the scenario where volcanic CO2 emissions were the primary carbon source, they were 398-505 ppm and 1708-1815 ppm, respectively.
WOS关键词WATER-USE EFFICIENCY ; ATMOSPHERIC CO2 ; C-13 DISCRIMINATION ; RAINFALL GRADIENT ; METHANE HYDRATE ; MODERN PLANTS ; C-3 PLANTS ; C3 PLANTS ; CLIMATE ; DELTA-C-13
资助项目National Natural Science Foundation of China[41772171] ; [41888101]
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:001053561700001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/111430]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Wang, Guoan; Han, Jiamao
作者单位1.China Meteorol Adm Training Ctr, Beijing 100081, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
3.China Agr Univ, Coll Resources & Environm Sci, Dept Environm Sci & Engn, Beijing 100193, Peoples R China
4.Chinese Acad Sci, Inst Earth Environm, Xian 710061, Peoples R China
推荐引用方式
GB/T 7714		 Shi, Minrui,Wang, Guoan,Guo, Zhengtang,et al. Continuous measurements in North China and culture experiments reveal the potential of leaf n-alkane carbon isotopes in paleoclimate studies[J]. GLOBAL AND PLANETARY CHANGE,2023,228:12.
APA Shi, Minrui.,Wang, Guoan.,Guo, Zhengtang.,Han, Jiamao.,Dong, Wanlin.,...&Han, Yaowen.(2023).Continuous measurements in North China and culture experiments reveal the potential of leaf n-alkane carbon isotopes in paleoclimate studies.GLOBAL AND PLANETARY CHANGE,228,12.
MLA Shi, Minrui,et al."Continuous measurements in North China and culture experiments reveal the potential of leaf n-alkane carbon isotopes in paleoclimate studies".GLOBAL AND PLANETARY CHANGE 228(2023):12.

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来源：地质与地球物理研究所

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