Mud volcanoes?a significant source of atmospheric methane

Dimitrov, Lyubomir

doi:10.1007/s00367-003-0140-3

Cited by 96 publications

(83 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Hydrogen sulfide can be a significant component of the total gas (Martinelli and Giovanni, 2005), which is consistent with the rotten-egg smell observed at the LUSI eruption crater. The petroleum-rich nature of the organic matter in the LUSI mud indicates that higher hydrocarbon gases such as ethane, propane, and possibly butane and low-molecular-weight PAHs, may also be present at low levels (Dimitrov 2002b). …”

Section: Gas Eruptionsmentioning

confidence: 99%

Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia

Plumlee¹,

Casadevall²,

Wibowo³

et al. 2008

Open-File Report

View full text Add to dashboard Cite

Section: Gas Eruptionsmentioning

confidence: 99%

Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia

Plumlee¹,

Casadevall²,

Wibowo³

et al. 2008

Open-File Report

View full text Add to dashboard Cite

“…Marine hydrocarbon seeps represent an important pathway by which natural gases, primarily methane, are released from the lithosphere into the hydrosphere and atmosphere. Marine hydrocarbon seeps are not only important local and regional sources of pollution but also might be an important factor impacting global climate change (Dimitrov 2003;Etiope and Milkov 2004;Etiope et al 2008). This is because methane is a strong greenhouse gas with a greenhouse effect that is approximately twenty times that of equal-quality carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Temporal Variation in Natural Gas Seep Rate and Influence Factors in the Lingtou Promontory Seep Field of the Northern South China Sea

Di¹,

Dong²,

Chen

2014

Terr. Atmos. Ocean. Sci.

View full text Add to dashboard Cite

Natural hydrocarbon seeps in marine environment are important sources of methane and other greenhouse gases into the ocean and the atmosphere. This greenhouse gas seepage influences the global methane budget and global climate change. Hydrocarbon seeps on the shallow seabed produce a near-shore gas bubble zone along the western coast of Hainan Island, in the northern South China Sea. However, few studies on the quantitative value of the methane flux and on temporal variation and influence factors of hydrocarbon seeps have been conducted until now. This study describes the results of continuous gas vent measurements for 420 hours on the seabed of the Lingtou promontory shore. The amount of gas released from a single gas vent was 30.5 m 3 during the measurement period. The gas flow rate ranged from 22 -72 L h -1 , with an average rate of 53.4 L h -1 . The time series analyses of the 420-hour record clearly show three principal tidal components with periods of 5.4, 4.6, and 2.4 hours, which are the main factors controlling the gas flow rate. Low flow rates were associated with high tide and high flow rates associated with low tide. A 1-m increase in seawater height results in a decrease of 20 -30 L h -1 or 35 -56% of the hourly flow rate. Therefore, the changes in gas volume escape from the pore could be attributed to the hydrostatic pressure effect induced by water depth. This dominant mechanism controlled pore activation as well as the gas flow rate, suggesting that in the marine environment, especially the shallow-water shelf area, sea level changes may result in great variations in methane release into the ocean and atmosphere.

show abstract

“…Substantial gas (especially methane) emissions out of the seafloor and into the atmosphere has an important impact on the Earth's climate (Paull et al 1991;Hovland et al 1993;Dimitrov 2002Dimitrov , 2003Etiope and Klusman 2002;Kopf 2002;Judd 2003;Kennett et al 2003;Milkov et al 2003). Gas emissions through mud volcanoes are most pronounced among all gas emission phenomena (e.g., Kopf 2002).…”

Section: Introductionmentioning

confidence: 99%

Seabed gas emissions and submarine landslides off SW Taiwan

Hsu¹,

Lin

Wang³

et al. 2018

Terr. Atmos. Ocean. Sci.

View full text Add to dashboard Cite

Methane emissions out of the seabed could seriously affect Earth's climate and are usually associated with the dissociation of gas hydrates stored in marine sediments on the continental margins. Spatially, gas emissions out of the seafloor are not evenly distributed in continental margins. Gas emissions out of the seabed generally occur through submarine mud volcanoes and gas seeps. To understand the seabed gas emissions off SW Taiwan, we investigate the distributions of active submarine mud volcanoes, gas seeps, and gas plumes off SW Taiwan. We examine all of the available sub-bottom profiler and EK echo sounder data. We identified 19 submarine mud volcanoes, 220 gas seeps, and 295 gas plumes. The gas emissions are generally distributed at the crests of mud diapiric ridges. Most of the active mud volcanoes and gas seeps cluster at the KASMVG (Kaoping submarine mud volcanoes group) area. We speculate that the intensive mud volcanism and gas seepage at the KASMVG area are ascribed to submarine channel erosion along the continental slope base. The erosion causes a deep V-shaped channel and a steep BSR (Bottom-Simulating Reflector) slope curve across the continental margin. The upward migration rate of free gas beneath the BSR is thus increased and intensifies mud volcanism and gas seepage at the KASMVG area. The gas seeps can reduce the slope stability and generate small-scale slides. The development of mud volcanoes in an area could effectively disturb the seabed morphology so that large-scale submarine landslides cannot easily happen.

show abstract

Mud volcanoes?a significant source of atmospheric methane

Cited by 96 publications

References 26 publications

Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia

Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia

Temporal Variation in Natural Gas Seep Rate and Influence Factors in the Lingtou Promontory Seep Field of the Northern South China Sea

Seabed gas emissions and submarine landslides off SW Taiwan

Contact Info

Product

Resources

About