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  • 1
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    Anaerobic methanotrophic communities thrive in deep submarine permafrost (2018)
    Springer Nature
    Details
    Publication Date: 2018-01-22
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 2
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    The development of permafrost bacterial communities under submarine conditions (2017)
    American Geophysical Union
    Details
    Publication Date: 2017-07-01
    Print ISSN: 2169-8953
    Electronic ISSN: 2169-8961
    Topics: Geosciences , Biology
    Published by American Geophysical Union
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  • 3
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    Microbial community composition and abundance after millennia of submarine permafrost warming (2019)
    Copernicus
    Details
    Publication Date: 2019-10-14
    Description: Warming of the Arctic led to an increase in permafrost temperatures by about 0.3 ∘C during the last decade. Permafrost warming is associated with increasing sediment water content, permeability, and diffusivity and could in the long term alter microbial community composition and abundance even before permafrost thaws. We studied the long-term effect (up to 2500 years) of submarine permafrost warming on microbial communities along an onshore–offshore transect on the Siberian Arctic Shelf displaying a natural temperature gradient of more than 10 ∘C. We analysed the in situ development of bacterial abundance and community composition through total cell counts (TCCs), quantitative PCR of bacterial gene abundance, and amplicon sequencing and correlated the microbial community data with temperature, pore water chemistry, and sediment physicochemical parameters. On timescales of centuries, permafrost warming coincided with an overall decreasing microbial abundance, whereas millennia after warming microbial abundance was similar to cold onshore permafrost. In addition, the dissolved organic carbon content of all cores was lowest in submarine permafrost after millennial-scale warming. Based on correlation analysis, TCC, unlike bacterial gene abundance, showed a significant rank-based negative correlation with increasing temperature, while bacterial gene copy numbers showed a strong negative correlation with salinity. Bacterial community composition correlated only weakly with temperature but strongly with the pore water stable isotopes δ18O and δD, as well as with depth. The bacterial community showed substantial spatial variation and an overall dominance of Actinobacteria, Chloroflexi, Firmicutes, Gemmatimonadetes, and Proteobacteria, which are amongst the microbial taxa that were also found to be active in other frozen permafrost environments. We suggest that, millennia after permafrost warming by over 10 ∘C, microbial community composition and abundance show some indications for proliferation but mainly reflect the sedimentation history and paleoenvironment and not a direct effect through warming.
    Print ISSN: 1726-4170
    Electronic ISSN: 1726-4189
    Topics: Biology , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 4
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    Microbial community composition and abundance after millennia of submarine permafrost warming (2019)
    Copernicus
    Details
    Publication Date: 2019-05-06
    Description: Warming of the Arctic led to an increase of permafrost temperatures by about 0.3 °C during the last decade. Permafrost warming is associated with increasing sediment water content, permeability and diffusivity and could on the long-term alter microbial community composition and abundance even before permafrost thaws. We studied the long-term effect (up to 2500 years) of submarine permafrost warming on microbial communities along an onshore-offshore transect on the Siberian Arctic Shelf displaying a natural temperature gradient of more than 10 °C. We analysed the in-situ development of bacterial abundance and community composition through total cell counts (TCC), quantitative PCR of bacterial gene abundance and amplicon sequencing, and correlated the microbial community data with temperature, pore water chemistry and sediment physicochemical parameters. On time-scales of centuries, permafrost warming coincided with an overall decreasing microbial abundance while millennia after warming microbial abundance was similar to cold onshore permafrost and DOC content was least. Based on correlation analysis TCC unlike bacterial gene abundance showed a significant rank-based negative correlation with increasing temperature while both TCC and bacterial gene copy numbers showed a negative correlation with salinity. Bacterial community composition correlated only weakly with temperature but strongly with pore-water stable isotope signatures and depth, while it showed no correlation with salinity. Microbial community composition showed substantial spatial variation and an overall dominance of Actinobacteria, Chloroflexi, Firmicutes, Gemmatimonadetes and Proteobacteria which are amongst the microbial taxa that were found to be active in other frozen permafrost environments as well. We suggest that, millennia after permafrost warming by over 10 °C, microbial community composition and abundance show some indications for proliferation but mainly reflect the sedimentation history and paleo-environment and not a direct effect through warming.
    Print ISSN: 1810-6277
    Electronic ISSN: 1810-6285
    Topics: Biology , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 5
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    The explorational drilling Gt BTrKoe 1/2021 in Berlin Adlershof, Germany - Field Data and Measurements (2023)
    GFZ Data Services
    Details
    Publication Date: 2023-12-04
    Description: Abstract
    Description: The Gt BTrKoe 1/2021 borehole was drilled in the framework of a research project called GeoFern, funded by the German Ministry for Economic Affairs and Climate Action under the grant number 03EE4007. The overall objective of this research project was to support the development of the geothermal heat utilization for urban areas. Therefore, the integration of reservoir utilization concepts into heat supply systems need to be studied. The GeoFern project aimed to contribute to the knowledge on geological structure and the lithological composition of the subsurface to minimize the explorational risks for future site developments in SE Berlin, Germany. It focused on the exploration of possible Mesozoic aquifers, suitable for aquifer thermal energy storage (ATES) in depths of up to 500 m. As stopping criteria for drilling, the presence of terrestrial (arid) clayey Keuper sediments of the Exter Formation (Upper German Triassic) were defined. In this data publication we provide the results of the investigations and measurements conducted on site in the field laboratory as well as the open-hole geophysical well-logging data of the Gt BTrKoe 1/2021 borehole acquired by a commercial contractor. In addition, a temperature log of the borehole, measured by the GFZ about two months after the end of drilling activities, is part of this data publication. The drilling of the Gt BTrKoe 1/2021 borehole started at the 15th of November 2021 with the setting of the conductor pipe and reached its final depth of 456 m in Triassic sediments on the 19th of December 2021. The drilling was conducted in two main sections using two different technologies. For the upper section, covering Cenozoic sediments and reaching a depth of 211 m, reverse drilling technology was used. This section comprises the Quaternary to Tertiary groundwater system and the Tertiary “Rupelton” (Oligocene, Rupelian). The latter represents an about 100 m thick clayey succession that do act as a regional aquitard, separating the deeper saline groundwater systems from the upper utilized (freshwater) groundwater levels. After setting and cementing of the casing, the borehole was further deepened by using conventional Rotary drilling technology. Due to the lack of knowledge on the geological situation of the pre-Cenozoic strata before the drilling, this section represents the most relevant part for answering the research goals of the project. In order to allow the most accurate description and characterization of the drilled strata, this section was completely cored using wireline coring equipment with 3-m core barrels. In total, 90 core runs were conducted and 197.4 m of cores retrieved, showing a core recovery factor of 81%. The core show a mean core diameter of about 100 mm. The drilling was stopped after encountering the multicolored terrestrial playa sediments of the Upper Triassic in the last core run. While the token cutting samples were not assigned with International Generic Sample Numbers (IGSN), the borehole (Norden, 2022) and all taken cores were registered with IGSNs.
    Keywords: Berlin ; Aquifer Thermal Energy Storage ; Geological Data ; Geological Field Laboratory ; compound material 〉 rock 〉 sedimentary rock ; compound material 〉 sedimentary material 〉 clastic sedimentary material 〉 clastic sedimentary rock ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOTHERMAL DYNAMICS 〉 GEOTHERMAL ENERGY ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOTHERMAL DYNAMICS 〉 GEOTHERMAL TEMPERATURE 〉 TEMPERATURE PROFILES ; EARTH SCIENCE 〉 SOLID EARTH 〉 ROCKS/MINERALS/CRYSTALS 〉 SEDIMENTARY ROCKS 〉 SEDIMENTARY ROCK PHYSICAL/OPTICAL PROPERTIES ; In Situ Land-based Platforms 〉 FIELD INVESTIGATION ; In Situ/Laboratory Instruments 〉 Corers 〉 BOX CORE ; lithosphere 〉 sediment ; Phanerozoic 〉 Cenozoic 〉 Neogene ; Phanerozoic 〉 Cenozoic 〉 Paleogene 〉 Oligocene ; Phanerozoic 〉 Cenozoic 〉 Quaternary ; Phanerozoic 〉 Mesozoic 〉 Jurassic 〉 Early/Lower Jurassic
    Type: Collection , Collection
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    DATA GFZ
  • 6
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    Pore water chemistry, grain sizes and sediment temperature of 4 sediment cores from submarine permafrost at Mamontov Klyk Cape, Laptev Sea shelf (2018)
    PANGAEA
    In:  Supplement to: Mitzscherling, Julia; Horn, Fabian; Winterfeld, Maria; Mahler, Linda; Kallmeyer, Jens; Overduin, Pier Paul; Schirrmeister, Lutz; Winkel, Matthias; Grigoriev, Mikhail N; Wagner, Dirk; Liebner, Susanne (2019): Microbial community composition and abundance after millennia of submarine permafrost warming. Biogeosciences, 16(19), 3941-3958, https://doi.org/10.5194/bg-16-3941-2019
    Details
    Publication Date: 2023-03-07
    Description: The mobilization of carbon in degrading permafrost is a long-term process and an important feedback upon climate change. Under submarine conditions substantial permafrost warming occurs millennia before permafrost thaws, potentially stimulating microbial communities. How microbial community composition and abundance responded to millennial-scale permafrost warming remains, however, unkown. We measured the in situ development of bacterial community composition and abundance together with temperature, salinity and pore water chemistry along an onshore-offshore transect on the Siberian Arctic Shelf. Samples derived from ice-bonded terrestrial permafrost comparable in age and sedimentation history that had been warming by more than 10 °C over the last 2500 years. Bacterial assemblages identified through amplicon sequencing correlated only weakly with temperature but strongly with pore water stable isotope signatures. They showed a significant spatial variation. Bacterial 16S rRNA gene copies quantified through qPCR negatively correlated with rising temperature, while both gene copies and total cell counts negatively correlated with increasing pore water salinity. Correlations of microbial community composition and abundance to stable isotope signatures and pore water salinity imply that they still mainly reflect the sedimentation history. On time-scales of centuries, permafrost warming coincided with decreasing microbial abundances, whereas millennia after inundation, microbial cell abundance was similar to onshore permafrost. We suggest that, as long as permafrost remains frozen the effect of warming alone on the permafrost-carbon-feedback is marginally even on time-scales of millennia because it has an overall low-level effect on microbial community composition and abundance.
    Keywords: AWI_PerDyn; Permafrost Research (Periglacial Dynamics) @ AWI
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 7
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    Pore water chemistry, grain sizes and sediment temperature of sediment core COAST_C-1 (2018)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AWI_PerDyn; AWI Arctic Land Expedition; Barium 2+; Beckman Coulter Laser diffraction particle size analyzer LS 200; Bromide; Calcium; Cape Mamontov Klyk; Carbon, organic, dissolved; Carbon, organic, total; Carbon, total; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Chloride; COAST_C-1; COAST_I; Conductivity, electrolytic; Core; Depth, reference; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Gravimetric estimate; ICP-OES, Perkin-Elmer, Optima 3000XL; interpolated; Ion chromatograph, Dionex Corporation, DX-320; Lithologic unit/sequence; Magnesium; Mass spectrometer Finnigan MAT Delta-S; Nitrate; Nitrogen, total; Permafrost Research (Periglacial Dynamics) @ AWI; pH; Potassium; RU-Land_2005_COAST; Salinity; Sample code/label; Sample ID; Silicon; Size fraction 〈 0.002 mm, clay; Size fraction 〉 0.063 mm, sand; Size fraction 0.063-0.002 mm, silt, mud; Sodium; Sulfate; Sulfur, total; Temperature, in rock/sediment; Thermistors and infrared sensors; Total organic carbon analyzer (TOC-VCPH); Water content, sediment; WTW MultiLab 540; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 5637 data points
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    DATA PANGAEA
  • 8
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    Pore water chemistry, grain sizes and sediment temperature of sediment core COAST_C-2 (2018)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AWI_PerDyn; AWI Arctic Land Expedition; Barium 2+; Beckman Coulter Laser diffraction particle size analyzer LS 200; Bromide; Calcium; Cape Mamontov Klyk; Carbon, organic, dissolved; Carbon, organic, total; Carbon, total; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Chloride; COAST_C-2; COAST_I; Conductivity, electrolytic; Core; Depth, reference; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Gravimetric estimate; ICP-OES, Perkin-Elmer, Optima 3000XL; interpolated; Ion chromatograph, Dionex Corporation, DX-320; Lithologic unit/sequence; Magnesium; Mass spectrometer Finnigan MAT Delta-S; Nitrate; Nitrogen, total; Permafrost Research (Periglacial Dynamics) @ AWI; pH; Potassium; RU-Land_2005_COAST; Salinity; Sample code/label; Sample ID; Silicon; Size fraction 〈 0.002 mm, clay; Size fraction 〉 0.063 mm, sand; Size fraction 0.063-0.002 mm, silt, mud; Sodium; Sulfate; Sulfur, total; Temperature, in rock/sediment; Thermistors and infrared sensors; Total organic carbon analyzer (TOC-VCPH); Water content, sediment; WTW MultiLab 540; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 2679 data points
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  • 9
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    Pore water chemistry, grain sizes and sediment temperature of sediment core COAST_C-4 (2018)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AWI_PerDyn; AWI Arctic Land Expedition; Barium 2+; Beckman Coulter Laser diffraction particle size analyzer LS 200; Bromide; Calcium; Cape Mamontov Klyk; Carbon, organic, dissolved; Carbon, organic, total; Carbon, total; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Chloride; COAST_C-4; COAST_I; Conductivity, electrolytic; Core; Depth, reference; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Gravimetric estimate; ICP-OES, Perkin-Elmer, Optima 3000XL; interpolated; Ion chromatograph, Dionex Corporation, DX-320; Lithologic unit/sequence; Magnesium; Mass spectrometer Finnigan MAT Delta-S; Nitrate; Nitrogen, total; Permafrost Research (Periglacial Dynamics) @ AWI; pH; Potassium; RU-Land_2005_COAST; Salinity; Sample code/label; Sample ID; Silicon; Size fraction 〈 0.002 mm, clay; Size fraction 〉 0.063 mm, sand; Size fraction 0.063-0.002 mm, silt, mud; Sodium; Sulfate; Sulfur, total; Temperature, in rock/sediment; Thermistors and infrared sensors; Total organic carbon analyzer (TOC-VCPH); Water content, sediment; WTW MultiLab 540; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 588 data points
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  • 10
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    Pore water chemistry, grain sizes and sediment temperature of sediment core COAST_C-3 (2018)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AWI_PerDyn; AWI Arctic Land Expedition; Barium 2+; Beckman Coulter Laser diffraction particle size analyzer LS 200; Bromide; Calcium; Cape Mamontov Klyk; Carbon, organic, dissolved; Carbon, organic, total; Carbon, total; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Chloride; COAST_C-3; COAST_I; Conductivity, electrolytic; Core; Depth, reference; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Gravimetric estimate; ICP-OES, Perkin-Elmer, Optima 3000XL; interpolated; Ion chromatograph, Dionex Corporation, DX-320; Lithologic unit/sequence; Magnesium; Mass spectrometer Finnigan MAT Delta-S; Nitrate; Nitrogen, total; Permafrost Research (Periglacial Dynamics) @ AWI; pH; Potassium; RU-Land_2005_COAST; Salinity; Sample code/label; Sample ID; Silicon; Size fraction 〈 0.002 mm, clay; Size fraction 〉 0.063 mm, sand; Size fraction 0.063-0.002 mm, silt, mud; Sodium; Sulfate; Sulfur, total; Temperature, in rock/sediment; Thermistors and infrared sensors; Total organic carbon analyzer (TOC-VCPH); Water content, sediment; WTW MultiLab 540; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 1361 data points
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    DATA PANGAEA
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