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  • 1
    Online Resource
    Online Resource
    Arctic Sea Ice Ecology : Seasonal Dynamics in Algal and Bacterial Productivity (2020)
    Cham : Springer International Publishing | Cham : Imprint: Springer
    Details Availability
    Keywords: Polar regions. ; Aquatic ecology . ; Oceanography. ; Climate change. ; Conservation biology. ; Ecology . ; Geoecology. ; Environmental geology. ; Polargebiete ; Meereis ; Ökosystem ; Algen ; Archaebakterien ; Bakterien ; Antarktis ; Arktis ; Grönland ; Nordpolarmeer ; Ökologie ; Glaziologie
    Description / Table of Contents: Chapter 1. The Book, and Ecology of Sea Ice -- Chapter 2. Autumn, Development and Consolidation of Sea Ice -- Chapter 3. Winter, Cold and Mature Sea Ice -- Chapter 4. Spring, Summer and Melting Sea Ice -- Chapter 5. Sea Ice in a Climate Change Context -- Chapter 6. Methods and Techniques in Sea Ice Ecology.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource(XIV, 178 p. 130 illus., 103 illus. in color.)
    Edition: 1st ed. 2020.
    ISBN: 9783030374723
    Series Statement: Springer Polar Sciences
    URL: https://doi.org/10.1007/978-3-030-37472-3
    DOI: 10.1007/978-3-030-37472-3
    Language: English
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  • 2
    Online Resource
    Online Resource
    Sea-ice communities : structure and composition in Baltic, Antarctic and Arctic seas (2002)
    Details Availability
    Keywords: Hochschulschrift ; Ostsee ; Meereis ; Polarmeer ; Meereis
    Description / Table of Contents: Summary ; Zs.-Fassung
    Type of Medium: Online Resource
    Pages: Online-Ressource (II, 84 S. = 1.11 MB, Text) , graph. Darst., Kt.
    Edition: [Electronic ed.]
    URL: http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-6393
    URL: http://eldiss.uni-kiel.de/macau/receive/dissertation_diss_639
    URN: urn:nbn:de:gbv:8-diss-6393
    Language: English
    Note: Kiel, Univ., Diss., 2002
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  • 3
    Online Resource
    Online Resource
    Nachhaltige Mobilitätskonzepte auf Basis von Elektromobilität und Stadtwerkeinfrastrukturen : Abschlussbericht zum Verbundvorhaben: Machbarkeitsanalyse "Elektromobiles Oberzentrum und ländliche Region" ; E-Aix, Teilprojekt: Nutzfahrzeuge (Stadt Aachen) ; Zeitraum: Oktober 2010 bis 31.12.2011 (2011)
    Aachen : Stadt Aachen, Fachbereich Umwelt
    Details Availability
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: Online-Ressource (PDF-Datei: 7 S., 47 KB)
    URL: https://edocs.tib.eu/files/e01fb15/826913105.pdf
    URL: https://doi.org/10.2314/GBV:826913105
    DOI: 10.2314/GBV:826913105
    Language: German
    Note: Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Förderkennzeichen BMBF 03KP564D. - Verbund-Nr. 01077262 , Systemvoraussetzungen: Acrobat reader.
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  • 4
    Book
    Book
    "BROKE-West" a biological (2010)
    Amsterdam : Elsevier
    Details Availability
    Type of Medium: Book
    Pages: S. 693 - 991 , Ill., graph. Darst
    Series Statement: Deep sea research 57.2010,9/10
    Language: English
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  • 5
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    Antarctic sympagic meiofauna in winter: Comparing diversity, abundance and biomass between perennially and seasonally ice-covered regions (2011)
    Elsevier
    In:  Deep Sea Research Part II: Topical Studies in Oceanography, 58 (9-10). pp. 1062-1074.
    Details
    Publication Date: 2020-08-05
    Description: This study of Antarctic sympagic meiofauna in pack ice during late winter compares communities between the perennially ice-covered western Weddell Sea and the seasonally ice-covered southern Indian Ocean. Sympagic meiofauna (proto- and metazoans 〉20 μm) and eggs 〉20 μm were studied in terms of diversity, abundance and carbon biomass, and with respect to vertical distribution. Metazoan meiofauna had significantly higher abundance and biomass in the western Weddell Sea (medians: 31.1×103 m−2 and 6.53mg m−2, respectively) than in the southern Indian Ocean (medians: 1.0×10 103 m−2and 0.06 mg m−2, respectively). Metazoan diversity was also significantly higher in the western Weddell Sea. Furthermore, the two regions differed significantly in terms of meiofauna community composition, as revealed through multivariate analyses. The overall diversity of sympagic meiofauna was high, and integrated abundance and biomass of total meiofauna were also high in both regions (0.6–178.6×103 m−2 and 0.02–89.70mg m−2, respectively), mostly exceeding values reported earlier from the western Weddell Sea in winter. We attribute the differences in meiofauna communities between the two regions to the older first-year ice and multi-year ice that is present in the western Weddell Sea, but not in the southern Indian Ocean. Our study indicates the significance of perennially ice-covered regions for the establishment of diverse and abundant meiofauna communities. Furthermore, it highlights the potential importance of sympagic meiofauna for the organic matter pool and trophic interactions in sea ice.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.dsr2.2010.10.029
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Quantification of ikaite in Antarctic sea ice (2013)
    In:  EPIC3Antarctic Science, 25(3), pp. 421-432, ISSN: 0954-1020
    Details
    Publication Date: 2019-07-17
    Description: Calcium carbonate precipitation in sea ice is thought to potentially drive significant CO2 uptake by the ocean. However, little is known about the quantitative spatial and temporal distribution of CaCO3 within sea ice, although it is hypothesized that high quantities of dissolved organic matter and/or phosphate (common in sea ice) may inhibit its formation. In this quantitative study of hydrous calcium carbonate as ikaite, sea ice cores and brine samples were collected from pack and land fast sea ice between September and December 2007 during two expeditions, one in the East Antarctic sector and the other off Terre Ade´lie. Samples were analysed for CaCO3, salinity, dissolved organic carbon/nitrogen, inorganic phosphate, and total alkalinity. No relationship between these parameters and CaCO3 precipitation was evident. Ikaite was found mostly in the uppermost layers of sea ice with maximum concentrations of up to 126 mg ikaite per litre melted sea ice being measured, although both the temporal and horizontal spatial distributions of ikaite were highly heterogeneous. The precipitate was also found in the snow on top of the sea ice at some of the sampling locations.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 7
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    The future of Arctic sea-ice biogeochemistry and ice-associated ecosystems (2020)
    In:  EPIC3Nature Climate Change, 10(11), pp. 983-992, ISSN: 1758-678X
    Details
    Publication Date: 2021-07-27
    Description: The Arctic sea-ice-scape is rapidly transforming. Increasing light penetration will initiate earlier seasonal primary production. This earlier growing season may be accompanied by an increase in ice algae and phytoplankton biomass, augmenting the emission of dimethylsulfide and capture of carbon dioxide. Secondary production may also increase on the shelves, although the loss of sea ice exacerbates the demise of sea-ice fauna, endemic fish and megafauna. Sea-ice loss may also deliver more methane to the atmosphere, but warmer ice may release fewer halogens, resulting in fewer ozone depletion events. The net changes in carbon drawdown are still highly uncertain. Despite large uncertainties in these assessments, we expect disruptive changes that warrant intensified long-term observations and modelling efforts.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 8
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    Influence of snow depth and surface flooding on light transmission through Antarctic pack ice (2016)
    In:  EPIC3AGU Fall meeting, San Francisco, CA, USA, 2016-12-12-2016-12-16
    Details
    Publication Date: 2017-01-04
    Description: Snow on sea ice plays a crucial role for interactions between the ocean and atmosphere within the climate system of polar regions. Antarctic sea ice is covered with snow during most of the year. The snow contributes substantially to the sea-ice mass budget as the heavy snow loads can depress the ice below water level causing flooding. Refreezing of the snow and seawater mixture results in snow-ice formation on the ice surface. The snow cover determines also the amount of light being reflected, absorbed, and transmitted into the upper ocean, determining the surface energy budget of ice-covered oceans. The amount of light penetrating through sea ice into the upper ocean is of critical importance for the timing and amount of bottom sea-ice melt, biogeochemical processes and under-ice ecosystems. Here, we present results of several recent observations in the Weddell Sea measuring solar radiation under Antarctic sea ice with instrumented Remotely Operated Vehicles (ROV). The combination of under-ice optical measurements with simultaneous characterization of surface properties, such as sea-ice thickness and snow depth, allows the identification of key processes controlling the spatial distribution of the under-ice light. Thus, our results show how the distinction between flooded and non-flooded sea-ice regimes dominates the spatial scales of under-ice light variability for areas smaller than 100m-by-100m. In contrast, the variability on larger scales seems to be controlled by the floe-size distribution and the associated lateral incidence of light. These results are related to recent studies on the spatial variability of Arctic under-ice light fields focusing on the distinctly differing dominant surface properties between the northern (e.g. summer melt ponds) and southern (e.g. year-round snow cover, surface flooding) hemisphere sea-ice cover.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 9
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    SIPEX-2: A study of sea-ice physical, biochemical and ecosystem processes off East Antarctica during spring 2012 (2016)
    PERGAMON-ELSEVIER SCIENCE LTD
    In:  EPIC3Deep-Sea Research Part II-Topical Studies in Oceanography, PERGAMON-ELSEVIER SCIENCE LTD, (131), pp. 1-6, ISSN: 0967-0645
    Details
    Publication Date: 2016-11-07
    Description: This editorial introduces a suite of articles resulting from the second Sea Ice Physics and Ecosystems eXperiment(SIPEX-2) voyage by presenting some background information on the study areaandAntarcticsea-ice conditions,and summarising the key findings from the project.Using the Australian iceb reaker RV Aurora Australis, SIPEX-2 was conducted in the area between 115–125°E and 62–66°S off East Antarctica during September to November 2012. This region had been sampled during two previous experiments,i.e. ARISE in 2003 (Massom etal.,2006a) and SIPEX in 2007(Worbyetal.,2011a). The 2012 voyage combined traditional and newly developed sampling methods with satellite and other data to measure sea-ice physical properties and pro- cesses on large scales,which provided context for bio geochemical and ecological case studies. Thes pecific goals of the SIPEX-2 project were to:(i)measure the spatial variability in sea-ice and snow-cover properties over small-to regional-length scales;(ii) improve understanding of sea-ice kinematic processes;and(iii) advance knowledge of the links between sea-ice physical characteristics,sea-ice biogeochemical cycling and ice-associated food-web dynamics.Our field-based activities were designed to inform modelling approaches and to improve our capability to assess impacts of predicted changes in Antarctic sea ice on Southern Ocean biogeochemical cycles and ecosystem function.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    Influence of snow depth and surface flooding on light transmittance through Antarctic pack ice (2017)
    In:  EPIC3International Symposium on The Cryosphere in a Changing Climate, Wellington, New Zealand, 2017-02-12-2017-02-17
    Details
    Publication Date: 2017-03-03
    Description: Snow on sea ice alters the properties of the underlying ice cover as well as associated physical and biological processes at the interfaces between atmosphere, sea ice and ocean. The Antarctic snow cover persists during most of the year and contributes significantly to the sea-ice mass due to the widespread surface flooding and related snow-ice formation. Snow also enhances the sea-ice surface reflectivity of incoming shortwave radiation and determines therefore the amount of light being reflected, absorbed, and transmitted to the upper ocean. Here, we present results of a case study of spectral solar radiation measurements under Antarctic pack ice with an instrumented Remotely Operated Vehicle in the Weddell Sea in 2013. In order to identify the key variables controlling the spatial distribution of the under-ice light regime, we exploit under-ice optical measurements in combination with simultaneous characterization of surface properties, such as sea-ice thickness and snow depth. Our results reveal how the distinction between flooded and non-flooded sea-ice regimes dominates the spatial scales of under-ice light variability for areas smaller than 100m-by-100m. However, the heterogeneous and widely metamorphous snow on Antarctic pack ice prevents a direct correlation between surface properties and the under-ice light field. Compared with Arctic sea ice, light levels under Antarctic pack ice are extremely low during spring (〈 0.1%). This is mostly a result of the distinctly different dominant sea ice and snow properties with seasonal snow cover (including strong melt and summer melt ponds) in the Arctic and a year-round snow cover and strong surface flooding in the Southern Ocean.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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