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High resolution foraminiferal stratigraphy and climatic variations over the last ca. 2500 years: Evidence from Gullmar Fjord and Skagerrak-Kattegat area

Författare och institution:
Irina Polovodova (Institutionen för geovetenskaper); Kjell Nordberg (Institutionen för geovetenskaper); Helena L. Filipsson (-)
Publicerad i:
International Symposium on Foramininfera Forams 2010, September 5-10th, 2010, University of Bonn, Germany, s. 164-164
Konferensbidrag - refereegranskat abstract
Sammanfattning (abstract):
Sediment cores from Gullmar Fjord (Swedish west coast) and the Skagerrak-Kattegat area were analysed for benthic foraminifera and stable δ13C isotope data. We obtained high-resolution records encompassing climatic variations over the last 2,500 years. In Gullmar Fjord, the δ13C curve shows distinctly negative values during Roman, Medieval, and Recent warm periods, but also during the Little Ice Age. Benthic foraminifera show profound changes in the record characterized by the decline of Nonionella iridea, Adercotryma glomerata and Cassidulina laevigata and the establishment of Hyalinea balthica and Stainforthia fusiformis. Roman and Medieval warm periods are characterized by similar foraminiferal assemblages, whereas Little Ice Age and Recent warming show significantly different faunal composition. The data are compared to records from Skagerrak and Kattegat in order to see if there are regional signals for these climatic events.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Geovetenskap och miljövetenskap
climate reconstructions, multi-proxy approach, benthic foraminifera, stable isotopes
Ytterligare information:
Oral presentation
Postens nummer:
Posten skapad:
2014-03-21 14:12
Posten ändrad:
2014-03-28 12:42

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