Evaluation of the distributions of hydroxylated glycerol dibiphytanyl glycerol tetraethers (GDGTs) in Holocene Baltic Sea sediments for reconstruction of sea surface temperature: the effect of changing salinity
Jaap S. Sinninghe Damsté,Lisa A. Warden,Carlo Berg,Klaus Jürgens,and Matthias Moros
Department of Marine Microbiology and Biogeochemistry, NIOZ Netherlands Institute for Sea Research, P.O. Box 59, 1790AB Den Burg, the Netherlands
Faculty of Geosciences, Department of Earth Sciences, Utrecht University, P.O. Box 80.021, 3508TA Utrecht, the Netherlands
Lisa A. Warden
Department of Marine Microbiology and Biogeochemistry, NIOZ Netherlands Institute for Sea Research, P.O. Box 59, 1790AB Den Burg, the Netherlands
Carlo Berg
Departments of Biological Oceanography and Marine Geology, Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Seestraße 15, 18119 Rostock, Germany
present address: Public Health Agency of Sweden, Nobels väg 18, Solna 17182 Stockholm, Sweden
Klaus Jürgens
Departments of Biological Oceanography and Marine Geology, Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Seestraße 15, 18119 Rostock, Germany
Departments of Biological Oceanography and Marine Geology, Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Seestraße 15, 18119 Rostock, Germany
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Reconstruction of past climate conditions is important for understanding current climate change. These reconstructions are derived from proxies, enabling reconstructions of, e.g., past temperature, precipitation, vegetation, and sea surface temperature (SST). Here we investigate a recently developed SST proxy based on membrane lipids of ammonium-oxidizing archaea in the ocean. We show that low salinities substantially affect the proxy calibration by examining Holocene Baltic Sea sediments.
Reconstruction of past climate conditions is important for understanding current climate change....
