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  • Alkalinity, total; Bromide; Chamber number; Chloride; DEPTH, sediment/rock; Geochemistry; Hydrogen sulfide; JAGO; Maria S. Merian; Methane; MSM21/4; MSM21/4_647-1; North Greenland Sea; Number; sediment porewater; Submersible JAGO; Sulfate; Svalbard  (1)
  • Scanning tunneling microscopy.  (1)
  • numerical analysis  (1)
Document type
Keywords
Publisher
Language
Years
  • 1
    Online Resource
    Online Resource
    Thermal and Current-Induced Magnetization Switching of Fe/W(110) Nanoislands Investigated by Spin-Polarized Scanning Tunneling Microscopy. (2009)
    Göttingen :Cuvillier Verlag,
    Details
    Keywords: Scanning tunneling microscopy. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (105 pages)
    Edition: 1st ed.
    ISBN: 9783736930346
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=5019672
    DDC: 502.82499999999999
    Language: English
    Location Call Number Limitation Availability
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    GEOMAR EBL
  • 2
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    Geochemical data from in-situ peeper sampling MSM21/4_647-1 (2019)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Description: Six peepers were deployed by the German submersible Jago in sediment of the methane seep area off northwestern Svalbard at the gas hydrate stability limit. Peeper 1 and 2 were deployed in a sulfur bacteria mat, Peeper 3 and 4 were in a siboglinid (pogonophoran) worm field, and Peeper 5 and 6 were at a gas vent. The distance between the three groups was about 1 meter. After 10 days incubation, peeper were retrieved and porewater solutes were measured in the peeper samples.
    Keywords: Alkalinity, total; Bromide; Chamber number; Chloride; DEPTH, sediment/rock; Geochemistry; Hydrogen sulfide; JAGO; Maria S. Merian; Methane; MSM21/4; MSM21/4_647-1; North Greenland Sea; Number; sediment porewater; Submersible JAGO; Sulfate; Svalbard
    Type: Dataset
    Format: text/tab-separated-values, 321 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Impact of Flow Alteration and Temperature Variability on Hyporheic Exchange (2021)
    Details
    Publication Date: 2021-12-03
    Description: Coupled groundwater flow and heat transport within hyporheic zones extensively affect water, energy, and solute exchange with surrounding sediments. The local and cumulative implications of this tightly coupled process strongly depend on characteristics of drivers (i.e., discharge and temperature of the water column) and modulators (i.e., hydraulic and thermal properties of the sediment). With this in mind, we perform a systematic numerical analysis of hyporheic responses to understand how the temporal variability of river discharge and temperature affect flow and heat transport within hyporheic zones. We identify typical time series of river discharge and temperature from gauging stations along the headwater region of Mississippi River Basin, which are characterized by different degrees of flow alteration, to drive a physics-based model of the hyporheic exchange process. Our modeling results indicate that coupled groundwater flow and heat transport significantly affects the dynamic response of hyporheic zones, resulting in substantial differences in exchange rates and characteristic time scales of hyporheic exchange processes. We also find that the hyporheic zone dampens river temperature fluctuations increasingly with higher frequency of temperature fluctuations. This dampening effect depends on the system transport time scale and characteristics of river discharge and temperature variability. Furthermore, our results reveal that the flow alteration reduces the potential of hyporheic zones to act as a temperature buffer and hinders denitrification within hyporheic zones. These results have significant implications for understanding the drivers of local variability in hyporheic exchange and the implications for the development of thermal refugia and ecosystem functioning in hyporheic zones.
    Keywords: 551.48 ; hyporheic exchange ; numerical analysis
    Language: English
    Type: map
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    CITATION GEO-LEO
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