缺氧事件

缺氧事件或大洋缺氧事件指的是海洋中氧气缺乏的一段时期，期间海水中的硫化氢（H
2S）含量大幅增加^[1]。它在地质史上曾多次发生，同时伴随而来的是生物集群灭绝^[2]。因此生物地层学上将缺氧时间当成时间划分的一个重要指标^[3]。它的成因可能是气候变暖、温室气体增加及洋流速度变缓等，而释放出大量二氧化碳的火山作用是其主要外部成因^[4]

红圈表示大规模灭绝地，黑点则是规模未知的灭绝地

绝大部分的缺氧事件都发生在侏罗纪、白垩纪等气温上升、二氧化碳含量增加的时期，缺氧事件中平均海水表面温度超过25 °C（77 °F），而现代则不过13 °C（55 °F）。气温上升的原因可能是原本封存于地壳中的天然气大规模释放^[5][6][7][8]。

参见

• 海洋低氧现象

参考文献

1. Timothy W. Lyons, Ariel D. Anbar, Silke Severmann, Clint Scott, and Benjamin C. Gill. Tracking Euxinia in the Ancient Ocean: A Multiproxy Perspective and Proterozoic Case Study. Annual Review of Earth and Planetary Sciences. January 19, 2009, 37: 507–53 [April 11, 2014]. Bibcode:2009AREPS..37..507L. doi:10.1146/annurev.earth.36.031207.124233. （原始内容存档于2020-05-15）.
2. Wignall, Paul B.; Richard J. Twitchett. Oceanic Anoxia and the End Permian Mass Extinction. Science. 5265. 24 May 1996, 272 (5265): 1155–1158 [12 September 2011]. Bibcode:1996Sci...272.1155W. PMID 8662450. doi:10.1126/science.272.5265.1155. （原始内容存档于2015-09-24）.
3. Peters, Walters; Modowan K.E. The Biomarker Guide, Volume 2: Biomarkers and Isotopes in the Petroleum Exploration and Earth History. Cambridge University Press. 2005: 749 [2017-03-29]. ISBN 978-0-521-83762-0. （原始内容存档于2020-07-26）.
4. Katja M Meyer; Lee R Kump. Oceanic euxinia in Earth history: Causes and consequences. Annual Review of Earth and Planetary Sciences. January 9, 2008, 36: 251–288 [2014-04-11]. Bibcode:2008AREPS..36..251M. doi:10.1146/annurev.earth.36.031207.124256. （原始内容存档于2020-02-26）.
5. What would 3 degrees mean?. [2008-07-08]. （原始内容存档于2008-07-19）.
6. Mark Lynas. Six Steps to Hell: The Facts on Global Warming. May 1, 2007 [2008-07-08]. （原始内容存档于2009-05-02）.
7. Gronstal, A. L. Gasping for Breath in the Jurassic Era. Imaginova. 2008-04-24 [2008-04-24]. （原始内容存档于29 April 2008）.
8. Pearce, C. R.; Cohen, A. S.; Coe, A. L.; Burton, K. W. Molybdenum isotope evidence for global ocean anoxia coupled with perturbations to the carbon cycle during the Early Jurassic. Geology (Geological Society of America). March 2008, 36 (3): 231–234 [2008-04-24]. Bibcode:2008Geo....36..231P. doi:10.1130/G24446A.1. （原始内容存档于29 April 2008）.

扩展阅读

• Kashiyama, Yuichiro; Nanako O. Ogawa; Junichiro Kuroda; Motoo Shiro; Shinya Nomoto; Ryuji Tada; Hiroshi Kitazato; Naohiko Ohkouchi. Diazotrophic cyanobacteria as the major photoautotrophs during mid-Cretaceous oceanic anoxic events: Nitrogen and carbon isotopic evidence from sedimentary porphyrin. Organic Geochemistry. May 2008, 39 (5): 532–549. doi:10.1016/j.orggeochem.2007.11.010.
• Kump, L.R.; Pavlov, A. & Arthur, M.A. Massive release of hydrogen sulfide to the surface ocean and atmosphere during intervals of oceanic anoxia. Geology. 2005, 33 (5): 397–400. Bibcode:2005Geo....33..397K. doi:10.1130/G21295.1.
• Hallam, A. Catastrophes and lesser calamities: the causes of mass extinctions. Oxford [Oxfordshire]: Oxford University Press. 2004: 91–607. ISBN 0-19-852497-8.
• Demaison G.J. and Moore G.T., (1980),"Anoxic environments and oil source bed genesis". American Association of Petroleum Geologists (AAPG) Bulletin, Vol.54, 1179–1209.

外部连接

• Hot and stinky: The oceans without oxygen （页面存档备份，存于互联网档案馆）
• Charles E. Jones; Hugh C. Jenkyns. Seawater strontium isotopes, oceanic anoxic events, and seafloor spreading (PDF). American Journal of Science. February 2001. （原始内容 (PDF)存档于2005-05-07）.
• R.D. Pancost; N. Crawford; S. Magness; A. Turner; H.C. Jenkyns; J.R. Maxwell. Further evidence for photic-zone euxinic conditions during Mesozoic oceanic anoxic events (PDF). Journal of the Geological Society. 2004, 161: 353–364. doi:10.1144/0016764903-059. （原始内容 (PDF)存档于2006-10-09）.
• Hugh Jenkyns talking about the Bonarelli Level and OAEs [1] （页面存档备份，存于互联网档案馆）
• Original article (Geologie en Mijnbouw, 55, 179–184, 1976) on oceanic anoxic events authored by Seymour Schlanger and Hugh Jenkyns [2] （页面存档备份，存于互联网档案馆）