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Phys.org

Seasonal change in Antarctic ice sheet movement observed for first time

Some estimates of Antarctica's total contribution to sea-level rise may be over- or underestimated, after researchers detected a previously unknown source of ice loss variability. The researchers, from the University of Cambridge and Austrian engineering company ENVEO, identified distinct, seasonal movements in the flow of land-based ice draining into George...
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Phys.org

Multiple Earth simulations show ocean acidification peak in Arctic Ocean may shift from winter to summer

A trio of researchers from CEA Saclay, Sorbonne Université-CNRS-IRD-MNHN and the Alfred Wegener Institute, respectively, has found evidence that peak ocean acidification in the Arctic Ocean may shift from winter to summer by 2100. In their paper published in the journal Nature, James Orr, Lester Kwiatkowski and Hans-Otto Pörtner describe their study of acidification of the Arctic Ocean in the future. A News and Views piece in the same journal also outlines their findings.
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Phys.org

Ancient ice age valleys offer clues to future ice sheet change

Deep valleys buried under the seafloor of the North Sea record how the ancient ice sheets that used to cover the UK and Europe expelled water to stop themselves from collapsing. A new study published this week has surprised the research team, who discovered that the valleys took just hundreds...
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Phys.org

Melting permafrost increases greenhouse gas from Arctic lakes

Groundwaters that circulate through the subsoil as a result of melting permafrost can transport carbon dioxide and methane to Arctic lakes and in turn be emitted to the atmosphere. This process of transporting greenhouse gases increases the effects of climate change and is now being quantified for the first time by researchers from the universities in Umeå, Barcelona, and Linköping. The study is published in Nature Communications.
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Detected An Unknown Source Of Ice-speed Change In Antarctic

Researchers have identified a previously undiscovered source of ice loss fluctuation, suggesting that some estimates of Antarctica’s total contribution to sea-level rise may be over- or underestimated. Researchers from the University of Cambridge and the Austrian engineering company ENVEO found that the flow of land-based ice that drains into...
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Nature.com

Seasonal peak in Arctic Ocean acidity could shift to the summer

The acidity of the Arctic Ocean currently peaks in winter. A modelling study suggests that this peak could shift to the summer in the future — this is bad news for ecosystem functions, food webs and Indigenous communities. Victoria Qutuuq Buschman ORCID: http://orcid.org/0000-0002-0781-642X0 &. Claudine Hauri ORCID: http://orcid.org/0000-0002-5048-00281. Victoria...
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earth.com

Arctic lakes are releasing methane from melting permafrost

Groundwater that is produced by melting permafrost transports methane to Arctic lakes, where it is released into the atmosphere. This process has been quantified for the first time in a study led by Carolina Olid of the Geomodels Research Institute of the University of Barcelona. According to Olid, climate change...
ENVIRONMENT
Phys.org

Antarctic glaciers vulnerable to rising temperatures

On the East Antarctic Plateau there are huge glaciers under the sea. In order to improve future scenarios related to rising sea levels, scientists need to understand the ways in which these glaciers will respond to rising temperatures in the atmosphere and in the ocean. An international study has just...
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