气候变化领域集成服务门户(CCPortal): CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2

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DOI	10.1130/B35097.1
	CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2
	Baker S.J.; Belcher C.M.; Barclay R.S.; Hesselbo S.P.; Laurin J.; Sageman B.B.
发表日期	2020
ISSN	167606
起始页码	321
结束页码	333
卷号	132 期号:2021-01-02
英文摘要	Cretaceous oceanic anoxic event 2 (OAE2) is thought to have been contemporary with extensive volcanism and the release of large quantities of volcanic CO2 capable of triggering marine anoxia through a series of biogeochemical feedbacks. High-resolution reconstructions of atmospheric CO2 concentrations across the initiation of OAE2 suggest that there were also two distinct pulses of CO2 drawdown coeval with increased organic carbon burial. These fluctuations in CO2 likely led to significant climatic changes, including fluctuations in temperatures and the hydrological cycle. Paleofire proxy records suggest that wildfire was a common occurrence throughout the Cretaceous Period, likely fueled by the estimated high atmospheric O2 concentrations at this time. However, over geological time scales, the likelihood and behavior of fire are also controlled by other factors such as climate, implying that CO2- driven climate changes should also be observable in the fossil charcoal record. We tested this hypothesis and present a high-resolution study of fire history through the use of fossil charcoal abundances across the OAE2 onset, and we compared our records to the estimated CO2 fluctuations published from the same study sites. Our study illustrates that inferred wildfire activity appears to relate to changes in CO2 occurring across the onset of OAE2, where periods of CO2 drawdown may have enabled an increase in fire activity through suppression of the hydrological cycle. Our study provides further insight into the relationships between rapid changes in the carbon cycle, climate, and wildfire activity, illustrating that CO2 and climate changes related to inferred wildfire activity can be detected despite the estimated high Cretaceous atmospheric O2 concentrations. © 2019 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184871
作者单位	Wild FIRE Laboratory, Hatherly Laboratories, University of Exeter, Prince of Wales Road, Exeter, EX4 4PS, United Kingdom; Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, 10th and Constitution, Washington, DC 20560-0121, United States; Camborne School of Mines and Environment and Sustainability Institute, University of Exeter, Penryn Campus, Penryn, TR10 9FE, United Kingdom; Institute of Geophysics, Academy of Sciences of the Czech Republic, Boční II/1401, Praha 4, Czech Republic; Department of Earth and Planetary Sciences, Northwestern University, Technological Institute, 2145 Sheridan Road, Evanston, IL 60208, United States
推荐引用方式 GB/T 7714	Baker S.J.,Belcher C.M.,Barclay R.S.,et al. CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2[J],2020,132(2021-01-02).
APA	Baker S.J.,Belcher C.M.,Barclay R.S.,Hesselbo S.P.,Laurin J.,&Sageman B.B..(2020).CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2.Bulletin of the Geological Society of America,132(2021-01-02).
MLA	Baker S.J.,et al."CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2".Bulletin of the Geological Society of America 132.2021-01-02(2020).