DOI: 10.1016/j.gloplacha.2013.04.004
论文题名: Impacts of a massive release of methane and hydrogen sulfide on oxygen and ozone during the late Permian mass extinction
作者: Kaiho K. ; Koga S.
刊名: Global and Planetary Change
ISSN: 0921-8276
出版年: 2013
卷: 107 起始页码: 91
结束页码: 101
语种: 英语
英文关键词: Carbon isotope
; Hydrogen sulfide
; Mass extinction
; Methane
; Model
; Oxygen
; Ozone
; Permian-Triassic
; Sulfur isotope
Scopus关键词: Carbon isotopes
; Flood basalt volcanism
; Igneous province
; Mass extinction
; Permian-Triassic
; Photochemical models
; Stratospheric ozone
; Sulfur isotope
; Hydrogen sulfide
; Isotopes
; Methane
; Models
; Oceanography
; Oxygen
; Ozone
; Ozone layer
; Sulfur determination
; Geology
; air-sea interaction
; anoxic conditions
; basalt
; hydrogen sulfide
; mass extinction
; mathematical analysis
; methane
; numerical model
; oxygen
; ozone
; Permian
; volcanism
; Siberia
; Animalia
英文摘要: The largest mass extinction of animals and plants in both the ocean and on land occurred in the late Permian (252Ma), largely coinciding with the largest flood basalt volcanism event in Siberia and an oceanic anoxic/euxinic event. We investigated the impacts of a massive release of methane (CH4) from the Siberian igneous province and the ocean and/or hydrogen sulfide (H2S) from the euxinic ocean on oxygen and ozone using photochemical model calculations. Our calculations indicated that an approximate of 14% decrease in atmospheric O2 levels would have occurred in the case of a large combined CH4 and H2S flux to the atmosphere, whereas an approximate of 8 to 10% decrease would have occurred from the CH4 flux and oxidation of all H2S in the ocean. The slight decrease in atmospheric O2 levels may have contributed to the extinction event. We demonstrate for the first time that a massive release of CH4 from the Siberian igneous province and a coincident massive release of CH4 and H2S did not cause ozone collapse. A collapse of stratospheric ozone leading to an increase in UV is not supported by the maximum model input levels for CH4 and H2S. These conclusions on O2 and O3 are correspondent to every H2S release percentages from the ocean to the atmosphere. © 2013 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878470313&doi=10.1016%2fj.gloplacha.2013.04.004&partnerID=40&md5=0bf9920834e108cda91df9ca87e27b3e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11182
Appears in Collections: 全球变化的国际研究计划
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作者单位: Institute of Geology and Paleontology, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
Recommended Citation:
Kaiho K.,Koga S.. Impacts of a massive release of methane and hydrogen sulfide on oxygen and ozone during the late Permian mass extinction[J]. Global and Planetary Change,2013-01-01,107.