New Study: 6500 Years Ago The Western Barents Sea Was Ice-Free And 10°C Warmer Than 2015

The Arctic’s western Barents Sea (Storfjordrenna) surface temperatures now range between 2-4°C. Sea ice persists in the region for 10 months of the year. A new study finds this same region was sea ice-free, 10°C warmer than today (13°C), and SSTs rapidly rose and fell by degrees C per century during the mid-Holocene.

The western Barents Sea surface temperatures oscillated around 3°C in 2015 according to a new study (?acka et al., 2019).

new study 6500 years ago the western barents sea was ice free and 10c warmer than 2015 - New Study: 6500 Years Ago The Western Barents Sea Was Ice-Free And 10°C Warmer Than 2015

Image Source: ?acka et al., 2019

During the Bølling-Allerød epoch 14,500 years ago, when CO2 concentrations were still in the 230 ppm range, ?acka et al., 2019 found the western Barents Sea surface temperatures to be comparable (2-4°C) to today.

From about 9000 to 3500 years ago, this same region’s temperatures rapidly (degrees Celsius per century) fluctuated between 3°C and 13°C. The latter temperature value – 10°C warmer than today – was achieved about 6500 years ago (265 ppm CO2).

Evidence also suggests this region of the Arctic was sea ice-free throughout most of the mid-Holocene. In contrast, today’s sea ice persists for all but August and September in the northern Barents Sea.

new study 6500 years ago the western barents sea was ice free and 10c warmer than 2015 1 - New Study: 6500 Years Ago The Western Barents Sea Was Ice-Free And 10°C Warmer Than 2015

Image Source: ?acka et al., 2019

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