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  • 1
    Online Resource
    Online Resource
    Deep‐water dynamics and boundary mixing in a nontidal stratified basin: A modeling study of the Baltic Sea
    American Geophysical Union (AGU) ; 2014
    In:  Journal of Geophysical Research: Oceans Vol. 119, No. 2 ( 2014-02), p. 1465-1487
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 119, No. 2 ( 2014-02), p. 1465-1487
    Abstract: Successful remodeling of interior/boundary mixing processes Dominant subinertial motion is a double‐gyre structured topographic wave Passive tracer mixing study using an ensemble experiment
    Type of Medium: Online Resource
    ISSN: 2169-9275 , 2169-9291
    URL: Issue
    URL: Article
    DOI: 10.1002/jgrc.v119.2
    DOI: 10.1002/2013JC009483
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2014
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    SSG: 16,13
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  • 2
    Online Resource
    Online Resource
    A metatranscriptomics‐based assessment of small‐scale mixing of sulfidic and oxic waters on redoxcline prokaryotic communities
    Wiley ; 2019
    In:  Environmental Microbiology Vol. 21, No. 2 ( 2019-02), p. 584-602
    Details
    In: Environmental Microbiology, Wiley, Vol. 21, No. 2 ( 2019-02), p. 584-602
    Abstract: Lateral intrusions of oxygen caused by small‐scale mixing are thought to shape microbial activity in marine redoxclines. To examine the response of prokaryotes to such mixing events we employed a shipboard mixing experiment in the euxinic central Baltic Sea: oxic, nitrate containing and sulfidic water samples without detectable oxygenized substances were incubated directly or after mixing. While nitrate, nitrite and ammonium concentrations stayed approximately constant in all incubations, we observed a decrease of sulfide after the contact with oxygen in the sulfide containing incubations. The transcription of marker genes from chemolithoauthotrophic key players including archaeal nitrifiers as well as gammaproteobacterial and campylobacterial autotrophic organisms that couple denitrification with sulfur‐oxidation were followed at four time points within 8.5 h. The temporally contrasting transcriptional profiles of gammaproteobacterial and campylobacterial denitrifiers that depend on the same inorganic substrates pointed to a niche separation. Particular archaeal and campylobacterial marker genes involved in nitrification, denitrification and sulfur oxidation, which depend on oxidized substrates, were highly upregulated in the anaerobic sulfidic samples. We suggest that, despite the absence of measurable oxygenated compounds in the sulfidic water, frequent intermittent small‐scale intrusions stimulate the permanent upregulation of genes involved in nitrification, denitrification and sulfur oxidation.
    Type of Medium: Online Resource
    ISSN: 1462-2912 , 1462-2920
    URL: Issue
    URL: Article
    DOI: 10.1111/emi.2019.21.issue-2
    DOI: 10.1111/1462-2920.14499
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2020213-1
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    The Baltic Sea Tracer Release Experiment: 2. Mixing processes
    American Geophysical Union (AGU) ; 2012
    In:  Journal of Geophysical Research: Oceans Vol. 117, No. C1 ( 2012-01)
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 117, No. C1 ( 2012-01)
    Abstract: Deep water mixing rates coupled to wind events Subinertial motions (topographic waves) dominate deep water kinetic energies Turbulence microstructure measurements confirm importance of boundary mixing
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2011JC007445
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2012
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Location Call Number Limitation Availability
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  • 4
    Online Resource
    Online Resource
    The Baltic Sea Tracer Release Experiment: 1. Mixing rates
    American Geophysical Union (AGU) ; 2012
    In:  Journal of Geophysical Research: Oceans Vol. 117, No. C1 ( 2012-01)
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 117, No. C1 ( 2012-01)
    Abstract: Mixing rates in the Gotland Basin are dominated by boundary mixing processes The time scale for Gotland Basin deep water renewal is approximately 2 years Mixing rates determined from the tracer CF3SF5
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2011JC007439
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2012
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Location Call Number Limitation Availability
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Diffusive Convection under Rapidly Varying Conditions
    American Meteorological Society ; 2018
    In:  Journal of Physical Oceanography Vol. 48, No. 8 ( 2018-08), p. 1731-1747
    Details
    In: Journal of Physical Oceanography, American Meteorological Society, Vol. 48, No. 8 ( 2018-08), p. 1731-1747
    Abstract: In most observations of diffusive convection in the ocean and in lakes, the characteristic diffusive staircases evolve over long time scales under quasi-stationary background conditions. In the Baltic Sea, however, diffusive staircases develop inside the flanks of intermittent intrusions that induce strong inverse temperature gradients over a vertical range of a few meters, varying on time scales of hours to days. Here, results are discussed from an extensive field campaign conducted in summer 2016 in the southern Baltic Sea, including temperature microstructure data from ocean gliders and an autonomous profiling platform. We find conditions favorable for diffusive instability in the vicinity of warm and cold intrusions with density ratios as small as R ρ = 1.3. The staircases evolving under these conditions are characterized by a small number of steps (typically 1–4) with order 0.1–1-m thickness, temperature differences exceeding 1 K across individual diffusive interfaces, and exceptionally large diffusive heat fluxes of order 10 W m −2 . The standard heat flux parameterization of Kelley agrees within a factor of 2 with the directly observed interfacial heat fluxes, except for large fluxes at low R ρ , which are strongly overestimated. The glider surveys reveal a surprisingly small lateral coherency of order 100 m of the staircase patterns, and a spreading of the diffusively unstable intrusions across isopycnals.
    Type of Medium: Online Resource
    ISSN: 0022-3670 , 1520-0485
    URL: Article
    DOI: 10.1175/JPO-D-18-0018.1
    Language: Unknown
    Publisher: American Meteorological Society
    Publication Date: 2018
    detail.hit.zdb_id: 2042184-9
    detail.hit.zdb_id: 184162-2
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  • 6
    Online Resource
    Online Resource
    Deepwater dynamics and mixing processes during a major inflow event in the central B altic S ea
    American Geophysical Union (AGU) ; 2017
    In:  Journal of Geophysical Research: Oceans Vol. 122, No. 8 ( 2017-08), p. 6648-6667
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 122, No. 8 ( 2017-08), p. 6648-6667
    Abstract: One of the largest Major Baltic Inflows sampled with an autonomous underwater winch including temperature microstructure Oxygenation of the anoxic bottom water by an import of approximately 21 Gmol of oxygen; inflow can be divided into three distinct phases No increase in turbulence levels during the inflow, clear signs of diffusive convection and nonturbulent molecular smoothing
    Type of Medium: Online Resource
    ISSN: 2169-9275 , 2169-9291
    URL: Issue
    URL: Article
    DOI: 10.1002/jgrc.v122.8
    DOI: 10.1002/2017JC013050
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2017
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 3094219-6
    SSG: 16,13
    Location Call Number Limitation Availability
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    Online Resource
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