气候变化领域集成服务门户(CCPortal): Early Jurassic climate and atmospheric CO2 concentration in the Sichuan paleobasin, southwestern China

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DOI	10.5194/cp-16-2055-2020
	Early Jurassic climate and atmospheric CO2 concentration in the Sichuan paleobasin, southwestern China
	Li X.; Wang J.; Rasbury T.; Zhou M.; Wei Z.; Zhang C.
发表日期	2020
ISSN	18149324
起始页码	2055
结束页码	2074
卷号	16 期号:6
英文摘要	Climatic oscillations have been developed through the (Early) Jurassic from marine sedimentary archives but remain unclear from terrestrial records. This work presents investigation of climate-sensitive sediments and carbon and oxygen isotope analyses of lacustrine and pedogenic carbonates for the Early Jurassic Ziliujing Formation taken from the Basin in southwestern China. Sedimentary and stable isotope proxies manifest that an overall secular (semi)arid climate dominated the Sichuan Basin during the Early Jurassic, except for the Hettangian. This climate pattern is similar to the arid climate in the Colorado Plateau region in western North America but is distinct from the relatively warm and humid climate in northern China and at high latitudes in the Southern Hemisphere. The estimated atmospheric CO2 concentration (pCO2) from carbon isotopes of pedogenic carbonates shows a range of 980 2610 ppmv (3:5 10 times the pre-industrial value) with a mean of 1660 ppmv. Three phases of pCO2 (the Sinemurian 1500 2000 ppmv, the Pliensbachian 1000 1500 ppmv, and the early Toarcian 1094 2610 ppmv) and two events of pCO2 rapidly falling by 1000 1300 ppmv are observed, illustrating the pCO2 perturbation in the Early Jurassic. The perturbation of pCO2 is compatible with seawater temperature and carbon cycle from the coeval marine sediments, suggesting a positive feedback of climate to pCO2 through the Early Jurassic. © 2020 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	atmospheric gas; carbon cycle; carbon dioxide; carbon isotope; concentration (composition); Jurassic; marine sediment; oxygen isotope; perturbation; seawater; stable isotope; water temperature; China; Colorado Plateau; North America; Sichuan Basin; United States
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153183
作者单位	State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China; Department of Geosciences, Stony Brook University, Stony Brook, NY 11794-2100, United States
推荐引用方式 GB/T 7714	Li X.,Wang J.,Rasbury T.,et al. Early Jurassic climate and atmospheric CO2 concentration in the Sichuan paleobasin, southwestern China[J],2020,16(6).
APA	Li X.,Wang J.,Rasbury T.,Zhou M.,Wei Z.,&Zhang C..(2020).Early Jurassic climate and atmospheric CO2 concentration in the Sichuan paleobasin, southwestern China.Climate of the Past,16(6).
MLA	Li X.,et al."Early Jurassic climate and atmospheric CO2 concentration in the Sichuan paleobasin, southwestern China".Climate of the Past 16.6(2020).