Scientists are coming to grips with how weather in Antarctica is influencing climate as far away as the tropics.

A reconstruction of changes in ocean oxygenation throughout the last glacial cycle shows that respired carbon was removed from the deep Southern Ocean during deglaciation and Antarctic warm events, consistent with a prominent role of reduced iron fertilization and enhanced ocean ventilation, modifying atmospheric carbon dioxide concentrations over the past 80,000 years.

The floating ice shelves along the seaboard of the Antarctic ice sheet restrain the outflow of upstream grounded ice1, 2. Removal of these ice shelves, as shown by past ice-shelf recession and break-up, accelerates the outflow3, 4, which adds to sea-level rise. A key question in predicting future outflow is to quantify the extent of calving that might precondition other dynamic consequences and lead to loss of ice-shelf restraint.

Loss of ice in Antarctica caused by a warming ocean may result in rising global sea levels by three metres, warns a recent research.

Melting ice sheets in Antarctica caused by ocean warming could potentially increase global sea levels by three meters.

Move over, Grand Canyon!

The timing and duration of historical climate changes have been debated by scientists for years. Ice core records, though, can offer a way for scientists to study glacial-interglacial cycles.

Recent work has suggested that sections of the West Antarctic ice sheet are already rapidly retreating, raising concerns about increased sea-level rise; now, an ice-sheet model is used to simulate the mass loss from the entire Antarctic ice sheet to 2200, suggesting that it could contribute up to 30 cm of sea-level rise by 2100 and 72 cm by 2200, but is unlikely to contribute more.

Retreating glaciers over the last 14,000 years caused a population explosion among Adelie penguins – a trend that could continue as Antarctic ice shrinks further thanks to global warming.

Major, long-term environmental changes are projected in the Southern Ocean and these are likely to have impacts for marine predators such as the Adélie penguin (Pygoscelis adeliae). Decadal monitoring studies have provided insight into the short-term environmental sensitivities of Adélie penguin populations, particularly to sea ice changes. However, given the long-term nature of projected climate change, it is also prudent to consider the responses of populations to environmental change over longer time scales.

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