The physics of bubbles in surficial, soft, cohesive sediments

Boudreau, Bernard P.

doi:10.1016/j.marpetgeo.2012.07.002

Cited by 133 publications

(147 citation statements)

References 97 publications

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“…1, dashed lines) and calculated at each moment of bubble growth. This capillary pressure term is associated with a thin coating of water along the bubble surfaces between the gas and the sediment, if present, rather than with water at pore throats in fine-grained muddy sediments (Boudreau, 2012). Gaseous methane pressure, P , calculated in Eq.…”

Section: Modeling Of Bubblementioning

confidence: 99%

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Methane bubble growth in fine-grained muddy aquatic sediment: Insight from modeling

Katsman

Ostrovsky

Makovsky

2013

Earth and Planetary Science Letters

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Section: Modeling Of Bubblementioning

confidence: 99%

“…is ignored as beyond the pore scale the small bubble retains a penny-shaped configuration (Boudreau, 2012). Ambient conditions for the calculations are taken as those of the NRL site in Eckernförde Bay (26 m water depth) at 1 m sediment depth for the summer conditions:…”

Section: Simulation Conditionsmentioning

confidence: 99%

Methane bubble growth in fine-grained muddy aquatic sediment: Insight from modeling

Katsman

Ostrovsky

Makovsky

2013

Earth and Planetary Science Letters

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“…The concentrations of CH 4 in sediment gas can be modified by the rate of ebullition, which is water depthdependent. Engle and Melack (2000), Liikanen et al (2003), Kankaala et al (2004), and Boudreau (2012) suggested enhancement of CH 4 ebullition under low hydrostatic pressure (i.e. in shallow waters).…”

Section: Discussionmentioning

confidence: 99%

“…Second, N 2 and O 2 can be supplied to the sediments in the form of large bubbles entrapped by solid particles settling in aerated water after a storm (Boudreau 2012) and/or via diffusion from overlying aerated water (Chanton et al 1989;Walter et al 2008). These bubbles act as nucleation sites (heterogenous nucleation) for larger bubbles containing microbial gas.…”

Section: Discussionmentioning

confidence: 99%

Processes affecting molecular and stable isotope compositions of sediment gas in estuarine waters along the southern Baltic coast (Poland)

et al. 2016

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This paper investigates the molecular and stable isotope compositions of sediment gases from seven coastal lakes along the southern Baltic coast in Poland. The aim is to extend the knowledge of the genesis and distribution of microbial gases in the zone of mixing of fresh and salt waters with special attention to the effect of salinity, climate-related seasonality, and vertical sediment mixing. We found differences in the compositions of gas between the studied lakes and within each lake. These differences are mainly controlled by lake water depth and the presence of macrophytes. Due to the dissolution of rising bubbles in highly oxygenated water, the concentrations of CH 4 and CO 2 show up to 67% decline along the water column in favor of N 2 and O 2 . On the other hand, in vegetated parts of the lakes, the CH 4 is depleted in favor of CO 2 , and the residual CH 4 and CO 2 are enriched in 13 C. Despite the fact that the coastal lakes display highly oxidizing conditions in the water column and that the bottom sediments are mixed by wind waves the CH 4 reveals rather low oxidation. On the basis of the CH 4 /N 2 ratio we established that there are differences in the intensity of ebullition throughout the lakes. Higher intensities of ebullition were found in shallower parts of the lakes. Salinity has no effect on the stable C and H isotope composition of sediment gas. It seems, however, that salinity affects the molecular composition of hydrocarbons via preferential oxidation of CH 4 under higher salinity conditions.

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“…Recently, more attention has been paid to investigations of the transport efficiency of shales in the context of oil/gas shale production (Bustin et al, 2008;Eseme et al, 2012;Amann-Hildenbrand et al, 2012;Ghanizadeh et al, 2013Ghanizadeh et al, , 2014. Analysis of the migration mechanisms within partly unlithified strata becomes important when explaining the origin of overpressure zones, sub-seafloor gas domes and gas seepages (Hovland & Judd, 1988;Boudreau, 2012).…”

mentioning

confidence: 99%