Open AccessHolocene temperatures in Bohuslän, southwest Sweden: a quantitative reconstruction from fossil pollen data
Author(s) -
Antonsson Karin,
Seppä Heikki
Publication year - 2007
Publication title -
boreas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.95
H-Index - 74
eISSN - 1502-3885
pISSN - 0300-9483
DOI - 10.1080/03009480701317421
Subject(s) - holocene , holocene climatic optimum , geology , pollen , radiocarbon dating , climate change , physical geography , climatology , paleoclimatology , boreal , temperature record , paleontology , oceanography , geography , ecology , biology
Inferred mean annual temperatures (Tann) from a radiocarbon‐dated fossil pollen stratigraphy obtained from Lake Trehörningen, southwest Sweden, provide evidence of climate variability during the Holocene in the boreal‐nemoral zone of Sweden. The record indicates low early Holocene temperatures, followed by a rising trend and maximum temperature values from about 7000 to 4000 cal. yr BP. During the later part of the Holocene until present day, a cooling trend is reflected in the temperature record. At about 8200 cal. yr BP, temperatures temporarily drop, and at 8000 cal. yr BP the rising temperature trend is recovered. Inferred mid‐Holocene temperatures are about 2.5‐3°C higher than at present, and also higher than other pollen‐inferred mid‐Holocene temperatures of 1.5‐2.5°C further to the north and east in Scandinavia. The reconstructed long‐term climate pattern in Trehörningen has an overall consistency with temperature reconstructions from Scandinavia, suggesting a regional climate link for the Holocene variability in Sweden. Holocene climate trends in Trehörningen also show a remarkably similar pattern with the classic work on postglacial climate change by Sernander (1893, Sernander 1909), Andersson (1909) and von Post (1924).