Global gas flux from mud volcanoes: A significant source of fossil methane in the atmosphere and the ocean

被引：152

作者：

Milkov, AV ^{[1
]}

Sassen, R

Apanasovich, TV

Dadashev, FG

机构：

[1] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA

[2] Texas A&M Univ, Geochem & Environm Res Grp, College Stn, TX USA

[3] Texas A&M Univ, Dept Stat, College Stn, TX 77843 USA

[4] Natl Acad Sci, Inst Geol, Baku, Azerbaijan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2003年 / 30卷 / 02期

关键词：

D O I：

10.1029/2002GL016358

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

[1] There are yet unidentified sources of fossil methane (CH4) in the atmosphere. Mud volcanoes (MVs) are a potentially significant but poorly quantified geologic source of fossil hydrocarbon gases and CO2 to the atmosphere and the ocean not included in the current models of sources and sinks. Our statistical analysis of 36 previous measurements and estimates of gas flux from individual MVs suggests that the global gas flux may be as high as similar to33 Tg yr(-1) (similar to15.9 Tg yr(-1) during quiescent periods plus similar to17.1 Tg yr(-1) during eruptions). Onshore and shallow offshore MVs are estimated to contribute similar to6 Tg yr(-1) of greenhouse gases directly to the atmosphere. MVs may contribute similar to9% of fossil CH4 missing in the modern atmospheric CH4 budget, and similar to12% in the preindustrial budget. Large volumes (similar to27 Tg yr(-1)) of gas may escape from deep-water MVs, suggesting that global gas flux from the seafloor may be underestimated.

引用

页码：9 / 1

页数：4

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