Tree rings indicate unusually cold weather in the Austrian Alps and Estonia, where the 1601–1602 winter became coldest in half a millennium. Tree ring analysis suggested cooling in Greece, Lapland (Finland), the Pyrenees and central Spain, the Swiss Alps and Switzerland (in 1600) more generally, where reconstructed winter temperatures were the lowest of 1525–1860. Anomalous weather conditions relating to the 1600 eruption, possibly under additional solar influence, have been noted in sediment cores from peat bogs in England and Denmark. In Norway, cooling coinciding with the eruption was probably the reason for the development of palsas in Færdesmyra that for the most part disappeared only in the 20th century.