FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2553368864> ?p ?o ?g. }

• W2553368864 endingPage "438" @default.
• W2553368864 startingPage "419" @default.
• W2553368864 abstract "Offshore western Svalbard plumes of gas bubbles rise from the seafloor at the landward limit of the gas hydrate stability zone (LLGHSZ; ∼400 m water depth). It is hypothesized that this methane may, in part, come from dissociation of gas hydrate in the underlying sediments in response to recent warming of ocean bottom waters. To evaluate the potential role of gas hydrate in the supply of methane to the shallow subsurface sediments, and the role of anaerobic oxidation in regulating methane fluxes across the sediment–seawater interface, we have characterised the chemical and isotopic compositions of the gases and sediment pore waters. The molecular and isotopic signatures of gas in the bubble plumes (C1/C2+ = 1 × 104; δ13C-CH4 = −55 to −51‰; δD-CH4 = −187 to −184‰) are similar to gas hydrate recovered from within sediments ∼30 km away from the LLGHSZ. Modelling of pore water sulphate profiles indicates that subsurface methane fluxes are largely at steady state in the vicinity of the LLGHSZ, providing no evidence for any recent change in methane supply due to gas hydrate dissociation. However, at greater water depths, within the GHSZ, there is some evidence that the supply of methane to the shallow sediments has recently increased, which is consistent with downslope retreat of the GHSZ due to bottom water warming although other explanations are possible. We estimate that the upward diffusive methane flux into shallow subsurface sediments close to the LLGHSZ is 30,550 mmol m−2 yr−1, but it is <20 mmol m−2 yr−1 in sediments further away from the seafloor bubble plumes. While anaerobic oxidation within the sediments prevents significant transport of dissolved methane into ocean bottom waters this amounts to less than 10% of the total methane flux (dissolved + gas) into the shallow subsurface sediments, most of which escapes AOM as it is transported in the gas phase." @default.
• W2553368864 created "2016-11-30" @default.
• W2553368864 creator A5024853091 @default.
• W2553368864 creator A5042757888 @default.
• W2553368864 creator A5048353167 @default.
• W2553368864 creator A5049140455 @default.
• W2553368864 creator A5065494348 @default.
• W2553368864 creator A5073783919 @default.
• W2553368864 creator A5075056484 @default.
• W2553368864 creator A5075347080 @default.
• W2553368864 date "2017-02-01" @default.
• W2553368864 modified "2023-10-01" @default.
• W2553368864 title "Methane in shallow subsurface sediments at the landward limit of the gas hydrate stability zone offshore western Svalbard" @default.
• W2553368864 cites W1485245062 @default.
• W2553368864 cites W1499275789 @default.
• W2553368864 cites W1506450375 @default.
• W2553368864 cites W1597530274 @default.
• W2553368864 cites W1612517152 @default.
• W2553368864 cites W1859570677 @default.
• W2553368864 cites W1869186988 @default.
• W2553368864 cites W1919849902 @default.
• W2553368864 cites W1963619040 @default.
• W2553368864 cites W1966240707 @default.
• W2553368864 cites W1966904718 @default.
• W2553368864 cites W1970123121 @default.
• W2553368864 cites W1975177396 @default.
• W2553368864 cites W1980128500 @default.
• W2553368864 cites W1981658991 @default.
• W2553368864 cites W1983229568 @default.
• W2553368864 cites W1984985818 @default.
• W2553368864 cites W1986333561 @default.
• W2553368864 cites W1990371336 @default.
• W2553368864 cites W1992676307 @default.
• W2553368864 cites W1995209478 @default.
• W2553368864 cites W1998014287 @default.
• W2553368864 cites W1999778708 @default.
• W2553368864 cites W2000460508 @default.
• W2553368864 cites W2005980756 @default.
• W2553368864 cites W2007452684 @default.
• W2553368864 cites W2008680648 @default.
• W2553368864 cites W2008842922 @default.
• W2553368864 cites W2009136031 @default.
• W2553368864 cites W2010922522 @default.
• W2553368864 cites W2011359570 @default.
• W2553368864 cites W2012838434 @default.
• W2553368864 cites W2017035766 @default.
• W2553368864 cites W2019205913 @default.
• W2553368864 cites W2023370940 @default.
• W2553368864 cites W2023404639 @default.
• W2553368864 cites W2024070075 @default.
• W2553368864 cites W2026823059 @default.
• W2553368864 cites W2028402429 @default.
• W2553368864 cites W2029946516 @default.
• W2553368864 cites W2037206582 @default.
• W2553368864 cites W2039220962 @default.
• W2553368864 cites W2041166777 @default.
• W2553368864 cites W2043672520 @default.
• W2553368864 cites W2044299056 @default.
• W2553368864 cites W2045780987 @default.
• W2553368864 cites W2045923264 @default.
• W2553368864 cites W2047663945 @default.
• W2553368864 cites W2057015319 @default.
• W2553368864 cites W2059037565 @default.
• W2553368864 cites W2062393229 @default.
• W2553368864 cites W2063229410 @default.
• W2553368864 cites W2063525007 @default.
• W2553368864 cites W2063778167 @default.
• W2553368864 cites W2066714823 @default.
• W2553368864 cites W2067103477 @default.
• W2553368864 cites W2069168300 @default.
• W2553368864 cites W2070804148 @default.
• W2553368864 cites W2079240018 @default.
• W2553368864 cites W2082857277 @default.
• W2553368864 cites W2089465072 @default.
• W2553368864 cites W2101821532 @default.
• W2553368864 cites W2104490095 @default.
• W2553368864 cites W2105507048 @default.
• W2553368864 cites W2108046206 @default.
• W2553368864 cites W2109133612 @default.
• W2553368864 cites W2112382733 @default.
• W2553368864 cites W2114299336 @default.
• W2553368864 cites W2119083643 @default.
• W2553368864 cites W2122895208 @default.
• W2553368864 cites W2123310579 @default.
• W2553368864 cites W2126853741 @default.
• W2553368864 cites W2127368047 @default.
• W2553368864 cites W2131079535 @default.
• W2553368864 cites W2131331821 @default.
• W2553368864 cites W2140693444 @default.
• W2553368864 cites W2143103930 @default.
• W2553368864 cites W2145003062 @default.
• W2553368864 cites W2147818114 @default.
• W2553368864 cites W2148467611 @default.
• W2553368864 cites W2152650773 @default.
• W2553368864 cites W2155304088 @default.
• W2553368864 cites W2157395365 @default.
• W2553368864 cites W2160730786 @default.
• W2553368864 cites W2162107715 @default.

• next