In the beginning of November 2009, I wrote the post “Descending into the world’s deepest shaft in the permafrost zone.” In a few days after I received a message with a lot of questions from a Hungarian scientists Adam Soereg.
He wrote “Data from Yakutsk is extremely important, because this is the longest dataset in the Eastern Siberian region, longer than any series in the United States. Yakutsk shows an abnormally high rate of warming since the early 19th century, but what if the official values used by large agencies between 1829 and 1854 are 1.9°c lower than reality?”
