(Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden ...

• Main Authors: Peterse, Francien, Kim, Jung-Hyun, Schouten, Stefan, Klitgaard-Kristensen, Dorthe, Koç, Nalân, Sinninghe Damsté, Jaap S
• Format: Dataset
• Language: English
• Published: PANGAEA 2009
• Subjects: Event label; Latitude of event; Longitude of event; DEPTH, sediment/rock; Carbon, organic, total; Branched glycerol dialkyl glycerol tetraether, Ia; Branched glycerol dialkyl glycerol tetraether, Ib; Branched glycerol dialkyl glycerol tetraether, Ic; Branched glycerol dialkyl glycerol tetraether, IIa; Branched glycerol dialkyl glycerol tetraether, IIb; Branched glycerol dialkyl glycerol tetraether, IIc; Branched glycerol dialkyl glycerol tetraether, IIIa; Branched glycerol dialkyl glycerol tetraether, IIIb; Branched glycerol dialkyl glycerol tetraether, IIIc; Branched glycerol dialkyl glycerol tetraether; Branched and isoprenoid tetraether index; Cyclization ratio of branched tetraethers; Methylation index of branched tetraethers; Temperature, annual mean; MultiCorer; Calculated from the MBT/CBT proxy; LA07/9; Lance; NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University NIOZ_UU; Kongsfjord*; Kongsfjorden; Krossfjord*; Svalbard
• Online Access: https://dx.doi.org/10.1594/pangaea.882408; https://doi.pangaea.de/10.1594/PANGAEA.882408

Branched glycerol dialkyl glycerol tetraethers (GDGTs) are membrane lipids of unknown bacteria that are ubiquitous in soil and peat. Two indices based on the distribution of these lipids in soils, the Cyclization of Branched Tetraethers (CBT) and the Methylation of Branched Tetraethers (MBT) indices have been shown to correlate with soil pH, and mean annual air temperature (MAT) and soil pH, respectively, and can be used to reconstruct MAT in palaeoenvironments. To verify the extent to which branched GDGTs in marine sediments reflect the distribution pattern on land and whether these proxies are applicable for palaeoclimate reconstruction in high latitude environments with a MAT of <0 °C, we compared the branched GDGT distribution in Svalbard soils and nearby fjord sediments. Although branched GDGT concentrations in the soil are relatively low (0.02-0.95 µg/g dry weight (dw)) because of the cold climate and the short growing season, reconstructed MATs based on the MBT/CBT proxy are ca. -4 °C, close to the ...