{"id":70270,"date":"2020-09-18T17:10:02","date_gmt":"2020-09-18T14:10:02","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/arctic-sea-ice-is-being-increasingly-melted-from-below-by-warming-atlantic-water\/"},"modified":"2020-09-18T17:10:02","modified_gmt":"2020-09-18T14:10:02","slug":"arctic-sea-ice-is-being-increasingly-melted-from-below-by-warming-atlantic-water","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/arctic-sea-ice-is-being-increasingly-melted-from-below-by-warming-atlantic-water\/","title":{"rendered":"#Arctic sea ice is being increasingly melted from below by warming Atlantic water"},"content":{"rendered":"

“#Arctic sea ice is being increasingly melted from below by warming Atlantic water<\/strong>”<\/p>\n

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\"Arctic
\n Credit: Denis Burdin \/ shutterstock
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Each September, scientists like me look out for the point when the Arctic’s meager summer fizzles out and sea ice begins to grow once more. This point is known as the annual sea ice minimum extent. It has declined consistently over the past 15 years, and 2019 was the second lowest after 2012 in 42 years of continuous satellite records. This year’s minimum is imminent, and there is already even less ice<\/a> coverage than last year.<\/p>\n


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What’s causing this decline in minimum sea ice extent? The short answer is our changing climate. But the more specific answer is that Arctic sea ice is increasingly being thinned not just by warm air from above but by ever-warmer waters from below.<\/p>\n

In fact, in a recently published scientific study<\/a> my colleagues and I looked at why sea ice was melting in the eastern Arctic Ocean and showed that the influence of heat from the interior of the ocean has now overtaken the influence of the atmosphere. <\/p>\n

While atmospheric heat is the dominant reason for melting in the summer, it has little influence during the cold dark polar winter. However, the ocean warms the ice from below year-round. Our new research shows that this influence has more than doubled over the past decade or so, and is now equivalent to the melting of nearly a meter thickness of sea ice each year (For comparison, at the North Pole the ocean is usually only covered by a couple meters of ice). <\/p>\n

This warm water, sometimes referred to as the “heat blob<\/a>,” originates in the Atlantic and heads northwards via an extension of the Gulf Stream, entering the Arctic Ocean around Svalbard, an archipelago halfway between Norway and the North Pole. The blob has already resulted in the disapp<\/a>earance of winter sea ice off the northern coast of Norway and north-west Russia. <\/p>\n