Latent heat polynyas are regions generating strong ice formation, convection and extensive water mass formation. Here we report on the effects of these processes on resuspension of sediments and subsequent methane release from the seafloor and on the resulting excess methane concentration in surface water on a polar shelf during winter. The study is based on measurements of concentration and δ13C values of methane, water temperature, salinity, light transmission and sea ice data collected in March 2003 in Storfjorden, southern Svalbard. In winter, strong and persistent northeasterly winds create polynyas in eastern Storfjorden and cause ice formation. The resulting brine-enriched water cascades from the Storfjordbanken into the central depr...
This PhD thesis highlights the role of the cycles of sea ice formation and melt on the methane (CH4)...
Summer sea ice cover in the Arctic Ocean has undergone a reduction in the last decade exposing the s...
Widespread seepage of methane from seafloor sediments offshore Svalbard close to the landward limit ...
Arctic amplificaton of global warming has led to increased summer sea ice retreat, which influencesg...
Methane sources and sinks in the Arctic are poorly quantified. In particular, methane emissions from...
Large quantities of methane are stored in hydrates and permafrost within shallow marine sediments in...
Large quantities of methane are stored in hydrates and permafrost within shallow marine sediments in...
Methane is a potent greenhouse gas whose atmospheric concentration has increased over th...
Atmospheric methane concentrations in the Arctic are the highest on earth. Sea ice retreat, thinning...
We examine an Arctic winter storm event, which led to ice break–up, the formation of open leads, and...
The maximum concentration of atmospheric methane (CH4) occurs over the Arctic: the value of CH4 over...
AbstractIn the Arctic Seas, the West Spitsbergen continental margin represents a prominent methane s...
Seasonally ice covered in the past, the fjords in West Spitsbergen turn into being perennially ice f...
The diverse range of mechanisms driving the Arctic amplification and global climate are not complete...
Methane is a powerful greenhouse gas. In the ocean, it originates from gas bearing sediments, can be...
This PhD thesis highlights the role of the cycles of sea ice formation and melt on the methane (CH4)...
Summer sea ice cover in the Arctic Ocean has undergone a reduction in the last decade exposing the s...
Widespread seepage of methane from seafloor sediments offshore Svalbard close to the landward limit ...
Arctic amplificaton of global warming has led to increased summer sea ice retreat, which influencesg...
Methane sources and sinks in the Arctic are poorly quantified. In particular, methane emissions from...
Large quantities of methane are stored in hydrates and permafrost within shallow marine sediments in...
Large quantities of methane are stored in hydrates and permafrost within shallow marine sediments in...
Methane is a potent greenhouse gas whose atmospheric concentration has increased over th...
Atmospheric methane concentrations in the Arctic are the highest on earth. Sea ice retreat, thinning...
We examine an Arctic winter storm event, which led to ice break–up, the formation of open leads, and...
The maximum concentration of atmospheric methane (CH4) occurs over the Arctic: the value of CH4 over...
AbstractIn the Arctic Seas, the West Spitsbergen continental margin represents a prominent methane s...
Seasonally ice covered in the past, the fjords in West Spitsbergen turn into being perennially ice f...
The diverse range of mechanisms driving the Arctic amplification and global climate are not complete...
Methane is a powerful greenhouse gas. In the ocean, it originates from gas bearing sediments, can be...
This PhD thesis highlights the role of the cycles of sea ice formation and melt on the methane (CH4)...
Summer sea ice cover in the Arctic Ocean has undergone a reduction in the last decade exposing the s...
Widespread seepage of methane from seafloor sediments offshore Svalbard close to the landward limit ...