Despite global warming, parts of Antarctica’s sea ice have increased over the past 20 years
Several parts of Antarctica have actually seen an increase over the last 20 yearsdespite ongoing global warming and climate change that has wreaked havoc since the late 20th century.
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First reported by Daily mailresearchers from the University of Cambridge, the University of Newcastle and the University of Canterbury in New Zealand used a combination of historical satellite measurements as well as ocean and atmospheric records and their observations revealed the complexity and l often overlooked importance of sea ice variability to the health of the Antarctic slick.
They found that 85% of the 870-mile-long ice shelf along the eastern Antarctic Peninsula experienced uninterrupted advance between shoreline surveys in 2004-2004 and 2019.. This is the complete opposite of the massive decline observed over the past two decades.
According to the researchers, this advance was linked to changes in atmospheric circulation that caused more sea ice to be transported to the coast by the wind.
Dr Frazer Christie, from the Scott Polar Research Institute (SPRI) in Cambridge and lead author of the paper, explained: ‘We have found that changing sea ice can either protect or trigger the calving of icebergs from large Antarctic ice shelves. Regardless of how the sea ice around Antarctica changes in a warming climate, our observations highlight the often-overlooked importance of sea ice variability to the health of the Antarctic ice sheet. Antarctic.
Dr Christie and his co-authors in 2019 were part of an expedition to examine ice conditions in the Weddell Sea off the eastern Antarctic Peninsula. According to study co-author Professor Julian Dowdeswell, during the expedition they saw that parts of the sea ice coast were at their most forward position since satellite records began in the 1960s.
Also Read: Every Human Tourist Melts 83 Metric Tons of Snow in Antarctica, Study Finds
After the expedition, they viewed satellite images dating back 60 years as well as state-of-the-art ocean and atmospheric models to study in detail the spatial and temporal pattern of ice change.
At present, it is uncertain how the sea ice around Antarctica will change due to climate change and its impact on sea level rise. Some models predict large-scale sea ice loss in the Southern Ocean while others predict ice gain. However, the breaking up of icebergs in 2020 could portend the start of a change in atmospheric patterns as well as a return to losses, according to the research.
Dr Wolfgang Rack from the University of Canterbury added: “It is entirely possible that we are seeing a transition to atmospheric patterns similar to those seen during the 1990s which encouraged sea ice loss and, ultimately more sea ice calving.” For more in the world of Technology and sciencekeep reading Indiatimes.com.