Pore water chemistry and sediment temperature for cores COAST_C-2 and BK-2, central Laptev Sea shelf ...

• Main Authors: Mitzscherling, Julia, Winkel, Matthias, Winterfeld, Maria, Horn, Fabian, Yang, Sizhong, Grigoriev, Mikhail N, Wagner, Dirk, Overduin, Pier Paul, Liebner, Susanne
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2017
• Subjects: Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; laptev; Laptev Sea; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.873837; https://doi.pangaea.de/10.1594/PANGAEA.873837

Submarine permafrost is more vulnerable to thawing than permafrost on land. Besides increased heat transfer from the ocean water, the penetration of salt lowers the freezing temperature and accelerates permafrost degradation. This data set provides sediment temperatures and pore water chemistry from two submarine permafrost cores from the Laptev Sea on the East Siberian Arctic Shelf which inundated about 540 and 2500 years ago. These data are published in partnership with a paper by Magritz et al., that traces how bacterial communities develop depending on duration of the marine influence and pore water chemistry. Magritz et al. (2017) show that submarine permafrost is a source of microbial life deep below the seafloor where it forms an unusual, non-steady state habitat. Pore water chemistry revealed different pore water units that reflected stages of permafrost thaw. Millennia after inundation by sea water, bacteria stratify into communities in permafrost, marine-affected permafrost, and seabed sediments. ... : Supplement to: Mitzscherling, Julia; Winkel, Matthias; Winterfeld, Maria; Horn, Fabian; Yang, Sizhong; Grigoriev, Mikhail N; Wagner, Dirk; Overduin, Pier Paul; Liebner, Susanne (2017): The development of permafrost bacterial communities under submarine conditions. Journal of Geophysical Research: Biogeosciences, 122(7), 1689-1704 ...