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Absolute magnitude of the sea ice anomaly is nearly one of the largest on record.
According to the findings, by the end of December 2022, sea ice extent was the lowest experienced in the 45-year satellite record.
Antarctic sea ice has been growing sluggishly and staying at record lows for each month since April.
Source: https://www.nytimes.com/2023/10/04/climate/antarctic-sea-ice-record-low.html
Antarctic sea ice varies a lot year-to-year, but even by Antarctic standards this is well outside the bounds of normality.
Source: https://phys.org/news/2023-08-antarctica-chunk-sea-ice-bigger.html
Arctic sea ice is melting quickly.
A snowmobile race in Labrador that bills itself as the longest and toughest in the world has been cancelled mid-course because of rain and broken sea ice brought on by unseasonably warm temperatures.
Both of Antarctica’s native penguin species rely on sea ice.
Source: https://indianexpress.com/article/world/climate-change/antarctic-sea-ice-record-low-8874245/
British Antarctic Survey researchers looked at satellite images that showed the loss of sea ice at breeding sites, well before chicks would have developed waterproof feathers.
Source: https://www.irishexaminer.com/news/arid-41211682.html
But Dr Ariaan Purich, a climate scientist at Monash University and an expert on the continent’s sea ice, lists three reasons to be concerned.
From around 2016, Antarctica will be in a new state, characterized by very little sea ice.
In addition to sea ice extent, scientists are closely monitoring the Thwaites Glacier, also known as the ‘Doomsday Glacier’ which is currently responsible for around 4% of global sea level rise.
In late 2022, four out of five emperor penguin colonies located in Antarctica’s Bellingshausen Sea region experienced total breeding failure due to sea ice loss.
In the Siberian sector in particular, average residence time of sea ice floes declined from 15 months to six months after 2007, indicating that most of them were no longer surviving the annual summer melt period to become thick multiyear ice.
In turn, other countries could challenge Canada’s Arctic sovereignty as melting sea ice opens the region to more maritime travel.
On Friday, an object was shot down over sea ice near Deadhorse, Alaska, and a third, cylindrical in shape, was destroyed over Canada’s Yukon on Saturday.
Source: https://thenewdaily.com.au/news/world/us-news/2023/02/14/us-friction-china-balloon-saga-grows/
On the other hand, microscopic phytoplankton floating near the ocean surface are increasingly taking advantage of shrinking sea ice to bloom in the newfound open water and sunlight.
Source: https://phys.org/news/2023-12-arctic-emitting-carbon.html
Photographer Hao Jiang: ‘I saw this polar bear family pause on its trek to the sea ice to hunt seals on a frozen day in the Arctic.
Scientists expect summer sea ice to completely disappear in the Arctic, but Serreze said it's hard to know when, exactly, that could happen.
Source: https://www.cbc.ca/news/canada/north/arctic-sea-ice-changes-1.6802540?cmp=rss
Scientists had known before that sea ice was shrinking in extent and getting thinner, but this “flushing” is key, said Mark Serreze, director of the National Snow and Ice Data Center, who wasn’t part of the study.
That would mean that by the end of the melt season in September, the Arctic would have less than one million square kilometres of sea ice, even under low emissions.