The Biogeochemical Cycle of Methane in the Coastal Zone and Littoral of the Kandalaksha Bay of the White Sea

Savvichev, Alexander S; Rusanov, Igor I; Yusupov, S. K.; Пименов, Н. В.; Lein, Alla Yu; Ivanov, M. V.

doi:10.1023/b:mici.0000036992.80509.2a

Cited by 19 publications

(24 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Of that marine contribution, 75 % is from coastal regions (Bange et al, 1994). CH 4 supersaturation relative to the atmosphere in estuaries (Borges and Abril, 2011;Upstill-Goddard et al, 2000) and coastal shelves (Kvenvolden et al, 1993;Savvichev et al, 2004;Shakhova et al, 2005Shakhova et al, , 2010 is indeed larger than that in the open ocean (Bates et al, 1996;Damm et al, 2007Damm et al, , 2008Damm et al, , 2010.…”

Section: Introductionmentioning

confidence: 98%

“…Many CH 4 measurements have been carried out in sediments and seawater throughout the coastal Arctic areas (Kvenvolden et al, 1993;Savvichev et al, 2004;Shakhova et al, 2005Shakhova et al, , 2010. These observations have led to speculations about potential CH 4 accumulation (Shakhova et al, 2010) and/or oxidation (Kitidis et al, 2010) under sea ice cover.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Physical controls on the storage of methane in landfast sea ice

et al. 2014

View full text Add to dashboard Cite

Abstract. We report on methane (CH 4 ) dynamics in landfast sea ice, brine and under-ice seawater at Barrow in 2009. The CH 4 concentrations in under-ice water ranged from 25.9 to 116.4 nmol L −1 sw , indicating a supersaturation of 700 to 3100 % relative to the atmosphere. In comparison, the CH 4 concentrations in sea ice ranged from 3.4 to 17.2 nmol L −1 ice and the deduced CH 4 concentrations in brine from 13.2 to 677.7 nmol L −1 brine . We investigated the processes underlying the difference in CH 4 concentrations between sea ice, brine and under-ice water and suggest that biological controls on the storage of CH 4 in ice were minor in comparison to the physical controls. Two physical processes regulated the storage of CH 4 in our landfast ice samples: bubble formation within the ice and sea ice permeability. Gas bubble formation due to brine concentration and solubility decrease favoured the accumulation of CH 4 in the ice at the beginning of ice growth. CH 4 retention in sea ice was then twice as efficient as that of salt; this also explains the overall higher CH 4 concentrations in brine than in the under-ice water. As sea ice thickened, gas bubble formation became less efficient, CH 4 was then mainly trapped in the dissolved state. The increase of sea ice permeability during ice melt marked the end of CH 4 storage.

show abstract

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Physical controls on the storage of methane in landfast sea ice

et al. 2014

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 98%

“…Understanding the current CH 4 budget is thus important in order to better simulate future climate scenarios. Many CH 4 measurements have been carried out in sediments and seawater throughout the coastal Arctic areas (Kvenvolden et al, 1993;Savvichev et al, 2004;Shakhova et al, 2005Shakhova et al, , 2010. These observations have led to speculations about potential CH 4 accumulation (Shakhova et al, 2010) and/or oxidation (Kitidis et al, 2010) under sea ice cover.…”

Section: Introductionmentioning

confidence: 99%

Physical controls on the storage of methane in landfast sea ice

Zhou¹,

Tison²,

Carnat³

et al. 2014

Preprint

View full text Add to dashboard Cite

We report on methane (CH 4 ) dynamics in landfast sea ice, brine and under-ice seawater at Barrow in 2009. The CH 4 concentrations in under-ice water ranged from 25.9 to 116.4 nmol L −1 sw , indicating a supersaturation of 700 to 3100 % relative to the atmosphere. In comparison, the CH 4 concentrations in sea ice ranged from 3.4 to 17.2 nmol L −1 ice and the deduced CH 4 concentrations in brine from 13.2 to 677.7 nmol L −1 brine . We investigated the processes underlying the difference in CH 4 concentrations between sea ice, brine and under-ice water and suggest that biological controls on the storage of CH 4 in ice were minor in comparison to the physical controls. Two physical processes regulated the storage of CH 4 in our landfast ice samples: bubble formation within the ice and sea ice permeability. Gas bubble formation due to brine concentration and solubility decrease favoured the accumulation of CH 4 in the ice at the beginning of ice growth. CH 4 retention in sea ice was then twice as efficient as that of salt; this also explains the overall higher CH 4 concentrations in brine than in the under-ice water. As sea ice thickened, gas bubble formation became less efficient, CH 4 was then mainly trapped in the dissolved state. The increase of sea ice permeability during ice melt marked the end of CH 4 storage.Published by Copernicus Publications on behalf of the European Geosciences Union.

show abstract

“…At the same time, macrobenthic communities from areas with extensive methane discharge located at shallow depths (e.g. in the Norwegian and White Seas at depths <100 m) show no or minor response in terms of chemosymbiotic communities development (Savvichev et al, 2004;Levin, 2005). However, at the shallow-water cold seeps certain changes in abundance/biomass of the common macrofaunal taxa are often observed, caused by enhanced vertical mixing, productivity and additional hard substrata (carbonate crusts) due to extensive methane discharge (Jensen et al, 1992;Sahling et al, 2003;Pohlman et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Fauna associated with shallow-water methane seeps in the Laptev Sea (v0.1)"

Sen¹

2020

View full text Add to dashboard Cite

Background. Methane seeps support unique benthic ecosystems in the deep sea existing due to chemosynthetic organic matter. In contrast, in shallow waters there is little or no effect of methane seeps on macrofauna. In the present study we focused on the recently described methane discharge area at the northern Laptev Sea shelf. The aim of this work was to describe the shallow-water methane seep macrofauna and to understand whether there are differences in macrobenthic community structure between the methane seep and background areas.

show abstract

The Biogeochemical Cycle of Methane in the Coastal Zone and Littoral of the Kandalaksha Bay of the White Sea

Cited by 19 publications

References 3 publications

Physical controls on the storage of methane in landfast sea ice

Physical controls on the storage of methane in landfast sea ice

Physical controls on the storage of methane in landfast sea ice

Peer Review #1 of "Fauna associated with shallow-water methane seeps in the Laptev Sea (v0.1)"

Contact Info

Product

Resources

About