Heat from the Atlantic Ocean carried to higher latitudes is causing the edge of the sea ice to retreat.
With alarm bells ringing about the rapid demise of sea ice in the Arctic Ocean, satellite data have revealed how the intrusion of warmer Atlantic waters is reducing ice regrowth in the winter. In addition, with seasonal ice more unpredictable than ever, ESA’s SMOS and CryoSat satellites are being used to improve sea-ice forecasts, which are critical for shipping, fisheries and indigenous communities, for example.
The amount of sea ice floating in the Arctic Ocean varies enormously as it grows and shrinks with the seasons. Although some of the older thicker ice remains throughout, there is an undeniable trend of declining ice as climate change tightens its grip on this fragile polar region.
Arctic sea ice reaches a maximum around March after the cold winter months and then shrinks to a minimum around September after the summer melt. However, these seasonal swings are not only linked to the changing seasons – it transpires that along with our warming climate, the temperature of adjacent ocean seawater is now also adding to the ice’s vulnerability.
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Image via European Space Agency
