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Progressive unanchoring of Antarctic ice shelves since 1973

Mass loss of the Antarctic Ice Sheet has been driven primarily by the thinning of the floating ice shelves that fringe the ice sheet1, reducing their buttressing potential and causing land ice to accelerate into the ocean2. Observations of ice-shelf thickness change by satellite altimetry stretch back only to 1992 (refs. 1,3–5) and previous information about thinning remains unquantified. However, extending the record of ice-shelf thickness change is possible by proxy, by measuring the change in area of the surface expression of pinning points—local bathymetric highs on which ice shelves are anchored6. Here we measure pinning-point change over three epochs spanning the periods 1973–1989, 1989–2000 and 2000−2022, and thus by proxy infer changes to ice-shelf thickness back to 1973–1989. We show that only small localized pockets of ice shelves were thinning between 1973 and 1989, located primarily in the Amundsen Sea Embayment and the Wilkes Land coastline. Ice-shelf thinning spreads rapidly into the 1990s and 2000s and is best characterized by the proportion of pinning points reducing in extent. Only 15% of pinning points reduced from 1973 to 1989, before increasing to 25% from 1989 to 2000 and 37% from 2000 to 2022. A continuation of this trend would further reduce the buttressing potential of ice shelves, enhancing ice discharge and accelerating the contribution of Antarctica to sea-level rise. Pinning-point changes over three epochs spanning the periods 1973–1989, 1989–2000 and 2000−2022 were measured, and by proxy the changes to ice-shelf thickness back to 1973–1989 were inferred.

Amundsen-sea , Oceans-general- , Oceans , Antarctica , Moscow , Moskva , Russia , Dronning-maud , Bellingshausen-sea , Weddell-sea , Moscow-university , Us-geological

Telenor deploys a mobile base station in Antarctica for Troll

Telenor announced on Tuesday that it has established what it says is the world's southernmost mobile base station in Antarctica, providing coverage for the Norwegian Polar Institute's Troll research station.

Svalbard , Kongsberg , Buskerud , Norway , Russia , Dronning-maud , Svalbard-general- , Antarctica , Argentina , Norwegian , Argentine , Russian

Swedish Research Expedition Investigates Antarctica's Future In A Warmer Climate – Eurasia Review

Swedish Research Expedition Investigates Antarctica's Future In A Warmer Climate – Eurasia Review
eurasiareview.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eurasiareview.com Daily Mail and Mail on Sunday newspapers.

Germany , Norway , Sweden , United-kingdom , Stockholm , Antarctica , United-states , Great-britain , Arjen-stroeven , Ipcc , Geography-at-stockholm-university , Stockholm-university

Swedish research expedition investigates Antarctica's future in a warmer climate

A research group led by Stockholm University is travelling to Antarctica. The goal is to investigate how the continent's ice sheets have changed his....

Stockholm , Sweden , Antarctica , Norway , Germany , United-states , Svea , Hedmark , United-kingdom , Great-britain , Swedish , Arjen-stroeven

A Norwegian Airline Landed the "Largest" Aircraft Ever in Antarctica

When a planeload of scientists landed on the ice at Troll Airfield last week, they arrived in what the media claimed is the largest airplane ever to land in Antarctica.

Cape-town , Western-cape , South-africa , Phoenix , Arizona , United-states , Oslo , Norway , Antarctica , Norwegian , Wolf-fang , Dronning-maud

Holidays with hubris: The true cost of Titanic tourism and luxury adventure travel

When does adventure tourism cease to be an adventure?

New-zealand , Dronning-maud , Svalbard-general- , Svalbard , Antarctica , Suleman-dawood , Jeff-bezos , James-cameron , Richard-branson , Jeff-bezo , James-cook , Joseph-banks

Harald V Net Worth - Turkish Weekly

Harald V Net Worth - Turkish Weekly
turkishweekly.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from turkishweekly.net Daily Mail and Mail on Sunday newspapers.

Oslo , Norway , Glucksburg , Brandenburg , Germany , Amsterdam , Noord-holland , Netherlands , Antarctica , Sweden , United-kingdom , London

Bouvetøya - one of most isolated islands in world

Bouvetøya (Bouvet Island) is a Norwegian volcanic island in the Southern Ocean. Bouvetøya is one of the most isolated islands in the world and 89 percent of the island is covered by glaciers. Bouvetøya is the Norwegian claim area in the seethe of the polar regions we

Norway , Olavtoppen , Bouvet-island-general- , Bouvet-island , United-kingdom , Antarctica , South-africa , France , Baku , Baki- , Azerbaijan , Frenchman

Frozen Planet II - Filming locations, wildlife and behind the scenes secrets

Frozen Planet II - Filming locations, wildlife and behind the scenes secrets
bbc.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from bbc.co.uk Daily Mail and Mail on Sunday newspapers.

New-zealand , Laguna-amarga , Magallanesy-antáica-chilena , Chile , Far-east , Mpumalanga , South-africa , Australia , Mongolia , Greenland , Musk-ox , Alaska

Frozen Planet II - Filming locations, wildlife and behind the scenes secrets

Frozen Planet II - Filming locations, wildlife and behind the scenes secrets
bbc.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from bbc.co.uk Daily Mail and Mail on Sunday newspapers.

New-zealand , Laguna-amarga , Magallanesy-antáica-chilena , Chile , Far-east , Mpumalanga , South-africa , Australia , Mongolia , Greenland , Musk-ox , Alaska