Monday, September 3, 2012
Using the Southern Oceans Baseline
In 1816, "the year without summer" a volcano caused considerable cooling in the Northern Hemisphere.
The Tambora timing does add up to the data though, from the Smithsonian Institution Volcanic Project, there were a number of small Northern hemisphere volcanoes that could have aided in the decline.
There are still plenty of questions, but the Southern Oceans baseline seems to have a number of advantages.
The Sargasso Sea temperature reconstruction of Keigwin also indicates a similar event with a range of Sargasso Sea temperatures of ~22C to ~25C degrees or +/-~1.5C range of temperatures similar to ranges in the reconstructions used above.