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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, Sarah J.1; Belcher, Claire M.1; Barclay, Richard S.2; Hesselbo, Stephen P.3,4; Laurin, Jiri5; Sageman, Bradley B.6 | |
2020 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:1-2页码:321-333 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA; Czech Republic |
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 O-2 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 O-2 concentrations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000505809800018 |
WOS关键词 | WESTERN INTERIOR ; ISOTOPE STRATIGRAPHY ; HYDROLOGICAL CYCLE ; MICROSCOPIC CHARCOAL ; TURONIAN STAGE ; TIME-SCALE ; TERRESTRIAL ; CO2 ; PHOSPHORUS ; INSOLATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279411 |
专题 | 地球科学 |
作者单位 | 1.Univ Exeter, WildFIRE Lab, Hatherly Labs, Prince Wales Rd, Exeter EX4 4PS, Devon, England; 2.Natl Museum Nat Hist, Smithsonian Inst, Dept Paleobiol, 10th & Constitut, Washington, DC 20560 USA; 3.Univ Exeter, Camborne Sch Mines & Environm, Penryn Campus, Penryn TR10 9FE, England; 4.Univ Exeter, Sustainabil Inst, Penryn Campus, Penryn TR10 9FE, England; 5.Acad Sci Czech Republ, Inst Geophys, Bocni 2-1401, Prague 4, Czech Republic; 6.Northwestern Univ, Dept Earth & Planetary Sci, Technol Inst, 2145 Sheridan Rd, Evanston, IL 60208 USA |
推荐引用方式 GB/T 7714 | Baker, Sarah J.,Belcher, Claire M.,Barclay, Richard S.,et al. CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(1-2):321-333. |
APA | Baker, Sarah J.,Belcher, Claire M.,Barclay, Richard S.,Hesselbo, Stephen P.,Laurin, Jiri,&Sageman, Bradley B..(2020).CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(1-2),321-333. |
MLA | Baker, Sarah J.,et al."CO2-induced climate forcing on the fire record during the initiation of Cretaceous oceanic anoxic event 2".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.1-2(2020):321-333. |
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