The fashionable Icelandic local weather is colder with extra ice than it has ever been up to now 8,000 years, besides within the 19th century.
Reposted by NoTricksZone
A wealth of new research into glacier and sea ice extent shows that modern Iceland is 2-4 ° C colder than it has been in the last 8,000 years, except for a slightly colder late 19th century. Even the 1700s were warmer with less ice than in and around Iceland today.
A new study (Geirsdóttir et al., 2020) now confirms that in large parts of the Holocene there was a warmth of at least “∼3–4 ° C above modernity in Iceland” over the past 8,000 years. Data from tree growth, glacier-induced soil erosion, algae productivity, sea ice biomarker proxies (IP25) and other climate indices confirm these conclusions.
Harning et al., 2020 report a Holocene cooling trend of a total of 7 ° C in Iceland’s surrounding sea surface temperatures (SST).
“With regard to foraminifera-reconstructed SST, there is a general trend of cooling from ~ 10 ° C to ~ 3 ° C during the last 8 ka.”
Only in the last centuries of modern times did temperatures drop sharply to the lowest values of the last 10,000 years (Geirsdóttir et al., 2020).
“The coolest climate in the last 10 ka occurred at the end of the 19th century.”
As a result of the greatest cooling, glaciers and sea ice reached their maximum extent of the Holocene 150 years ago.
While Iceland’s glaciers and the extent of sea ice on the North Shelf partially recovered in the first half of the 20th century, the ice extent is still above the level of the 18th century and earlier.
There is nothing to suggest that modern warmth or ice recession in and around Iceland is unprecedented or even unusual.
Image (s) source: Geirsdóttir et al., 2020
Source images: Harning et al., 2020
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