Publication Date:
2022-02-16
Description:
A new estimate of global methane
emission into the atmosphere from mud volcanoes
(MVs) on land and shallow seafloor is presented.
The estimate, considered a lower limit, is based on
1) new direct measurements of flux, including both
venting of methane and diffuse microseepage
around craters and vents, and 2) a classification of
MV sizes in terms of area (km2) based on a
compilation of data from 120 MVs. The methane
flux to the atmosphere is conservatively estimated
between 6 and 9 Mt y)1. This emission from MVs is
3–6% of the natural methane sources and is
comparable with ocean and hydrate sources,
officially considered in the atmospheric methane
budget. The total geologic source, including MVs,
seepage from seafloor, microseepage in
hydrocarbon-prone areas and geothermal sources,
would amount to 35–45 Mt y)1. The authors believe
it is time to add this parameter in the
Intergovernmental Panel on Climate Change official
tables of atmospheric methane sources.
Description:
Published
Description:
997-1002
Description:
4.5. Degassamento naturale
Description:
JCR Journal
Description:
reserved
Keywords:
Methane
;
Mud volcanoes
;
03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Permalink
