by K. Richard, Jul 3, 2025 in NoTricksZone

According to a new study, abrupt (±1-2°C per century) shifts in North Atlantic sea surface temperature (SST) have occurred routinely over the last 9000 years. These decadal- to centennial-scale climate changes were “induced by Holocene summer insolation and atmosphere-ocean internal variability.”

The average SST throughout the 8.2 ka fluctuation was 10.0°C. The average 4.2 ka SST was 8.1°C. And during the Little Ice Age (LIA, 1600-1900 CE) the North Atlantic SSTs averaged 7.5°C.

Since 1900, SSTs have been stable to declining, suggesting the modern period is the coldest of the Holocene.

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