South-east Greenland sea floor temperature 1 ° – 2 ° C hotter in 1940 than right this moment, a brand new research exhibits – watts with that?
From the NoTricksZone
By P Gosselin on February 14, 2021 Share this…
According to scientists, the sea surface temperature in southeast Greenland was warmer than it is today in the 1940s.
A year ago a team of Danish scientists, led by David Wangner, published an article about the results of a Greenland sediment core from the Skjoldungen Fjord near the Thrym glacier, which could be used to reconstruct sea surface temperatures.
Hat-tip: The cold sun.
Map of the Skjoldungen area. The core position is indicated by a red star. Image: Wangner et al.
The core spans the last 200 years (1796–2013). The scientists note that the SST dataset compares well with other alkenon-based reconstructions from southeast Greenland and therefore shows regional variability in shelf water.
Today, some scientists claim the present is warmer than it has ever been in the last 1,000 years and suggest that the Greenland ice sheets are melting quickly. However, the results of the core reconstruction show that it was warmer about 80 years ago in the past.
80 years ago warmer
The reconstructed SSTs actually show “strong amplitude fluctuations between 5 ° C and 12 ° C, especially in the 20th century”.
As the reconstructed sea surface temperatures in the region show, it was just as warm or warmer in the 1940s. The period from 1915 to 1950 was at a similar level to today, so nothing unusual is happening at the moment.
The authors also say that although meltwater production may have been affected by climate, the position of the glacier edge and the calving of icebergs remained relatively constant throughout the 20th century.
Models reflect Greenland poorly
The Danish scientists are now calling for Greenland glaciers to be better accounted for in climate models, saying that the unusual warmth of the early 20th century is related to a complex interaction between two major oceanic cycles: the AMO and the NAO.
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