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  • 1
    Keywords: Forschungsbericht ; Ems-Dollart-Gebiet ; Klimaänderung ; Anthropogener Einfluss ; Hydrodynamik ; Modell ; Dimension 3
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (19 Seiten, 4,32 MB) , Illustrationen, Diagramme
    Language: German
    Note: Förderkennzeichen BMBF 03F0635A , Paralleltitel und durchführende Institution dem Berichtsblatt entnommen , In der Kopfzeile: NWO, Netherlands Organisation for Scientific Research , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Text deutsch. - Mit deutscher und englischer Zusammenfassung
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  • 2
    Keywords: Watt ; Ausstellungskatalog 1998 ; Ausstellungskatalog ; Watt
    Type of Medium: Image
    Pages: 105 S. , Ill., graph. Darst., Kt. , 22 cm
    ISBN: 3782911539
    Series Statement: Kleine Senckenberg-Reihe 29
    DDC: 333.91/816/0943512
    RVK:
    RVK:
    Language: German
    Note: Literaturverz. S. 101 - 105. - Literaturangaben
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 39 (1992), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Numerous methods for roundness measurement have been developed. None, however, has been generally accepted, because of conceptual and practical deficiencies. Modern image processing and Fourier grain shape analysis have eliminated the practical shortcomings, but the conceptual ones remained. Single, higher harmonics of the Fourier series, for example, fail to serve as reliable equivalents for roundness evaluation. The concept outlined in this paper recognizes three criteria for the evaluation of roundness. (1) All curvatures, convex as well as concave or plane elements, must be considered. (2) The positions of morphological elements are significant because salient parts of a particle are more easily abraded than protected ones. Consequently, the curvatures have to be weighted by their relative position on the particle. (3) Positions and curvatures of morphological elements have to be compared with the particle's ultimate abraded shape, which is assumed to be an ellipsoid. The ellipsoid reflects the aspect of form or sphericity. The distinction between sphericity and roundness is retained because there is no evidence that sphericity changes significantly during transport. The measurement is based on the outline of a particle's maximum projection plane, which is transformed to a Fourier series. Roundness data are derived from the complete amplitude spectrum. The aspect of sphericity is eliminated by subtracting the amplitude spectrum of the best approximating ellipse from the spectrum of the empirical shape. The residual amplitudes are normalized and summed. In a final step the resulting values are rescaled. This guarantees reasonable boundaries and a normal distribution of roundness values. The procedure is automated and its efficiency permits the calculation of large samples. Tests on fluvial and coastal gravel populations demonstrate that the method is sensitive to abrasional wear during all stages of roundness.
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 2024-02-07
    Description: During RV MS Merian expedition MSM75, an international, multidisciplinary team explored the Reykjanes Ridge from June to August 2018. The first area of study, Steinahóll (150–350 m depth), was chosen based on previous seismic data indicating hydrothermal activity. The sampling strategy included ship- and AUV-mounted multibeam surveys, Remotely Operated Vehicle (ROV), Epibenthic Sledge (EBS), and van Veen grab (vV) deployments. Upon returning to Steinahóll during the final days of MSM75, hydrothermal vent sites were discovered using the ROV Phoca (Kiel, GEOMAR). Here we describe and name three new, distinct hydrothermal vent site vulnerable marine ecosystems (VMEs); Hafgufa, Stökkull, Lyngbakr. The hydrothermal vent sites consisted of multiple anhydrite chimneys with large quantities of bacterial mats visible. The largest of the three sites (Hafgufa) was mapped, and reconstructed in 3D. In total 23,310 individual biological specimens were sampled comprising 41 higher taxa. Unique fauna located in the hydrothermally venting areas included two putative new species of harpacticoid copepod (Tisbe sp. nov. and Amphiascus sp. nov.), as well as the sponge Lycopodina cupressiformis (Carter, 1874). Capitellidae Grube, 1862 and Dorvilleidae Chamberlin, 1919 families dominated hydrothermally influenced samples for polychaetes. Around the hydrothermally influenced sites we observed a notable lack of megafauna, with only a few species being present. While we observed hydrothermal associations, the overall species composition is very similar to that seen at other shallow water vent sites in the north of Iceland, such as the Mohns Ridge vent fields, particularly with peracarid crustaceans. We therefore conclude the community overall reflects the usual “background” fauna of Iceland rather than consisting of “vent endemic” communities as is observed in deeper vent systems, with a few opportunistic species capable of utilizing this specialist environment.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: archive
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  • 5
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    Unknown
    PANGAEA
    In:  Supplement to: Markert, Edith; Holler, Peter R; Kröncke, Ingrid; Bartholomä, Alexander (2013): Benthic habitat mapping of sorted bedforms using hydroacoustic and ground-truthing methods in a coastal area of the German Bight/North Sea. Estuarine, Coastal and Shelf Science, 129, 94-104, https://doi.org/10.1016/j.ecss.2013.05.027
    Publication Date: 2023-05-12
    Description: The continuously influence of human impacts on the seafloor and benthic habitats demands the knowledge of clearly defined habitats to assess recent conditions and to monitor future changes. In this study, a benthic habitat dominated by sorted bedforms was mapped in 2010 using biological, sedimentological and acoustic data. This approach reveals the first interdisciplinary analysis of macrofauna communities in sorted bedforms in the German Bight. The study area covered 4 km², and was located ca. 3.5 km west of island of Sylt. Sorted bedforms formed as sinuous depressions with an east west orientation. Inside these depressions coarse sand covers the seafloor, while outside predominantly fine to medium sand was found. Based on the hydroacoustic data, two seafloor classes were identified. Acoustic class 1 was linked to coarse sand (type A) found inside these sorted bedforms, whereas acoustic class 2 was related to mainly fine to medium sands (type B). The two acoustic classes and sediment types corresponded with the macrofauna communities 1 and 2. The Aoinides paucibranchiata-Goniadella bobretzkii community on coarse sand and the Spiophanes bombyx - Magelona johnstonii community on fine sand. A transitional community 3 (Scoloplos armiger - Ophelia community), with species found in communities 1 and 2, could not be detected by hydroacoustic methods. This study showed the limits of the used acoustic methods, which were unable to detect insignificant differences in the fauna composition of sandy areas.
    Keywords: WIMO; Wissenschaftliche Monitoringkonzepte für die Deutsche Bucht
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 6
    Publication Date: 2023-05-12
    Keywords: Classification; Date/Time of event; Determined after Folk (1954); Event label; German Bight, North Sea; Latitude of event; Longitude of event; MULT; Multiple investigations; Senckenberg; Senckenberg_09_2010; Shell debris; Size fraction 〈 0.063 mm, mud, silt+clay; Size fraction 〉 2 mm, gravel; Size fraction 0.125-0.063 mm, 3.0-4.0 phi, very fine sand; Size fraction 0.250-0.125 mm, 2.0-3.0 phi, fine sand; Size fraction 0.500-0.250 mm, 1.0-2.0 phi, medium sand; Size fraction 1.000-0.500 mm, 0.0-1.0 phi, coarse sand; Size fraction 2.000-0.063 mm, sand; Size fraction 2.000-1.000 mm, (-1.0)-0.0 phi, very coarse sand; SNG2010_09_1; SNG2010_09_10; SNG2010_09_11; SNG2010_09_12; SNG2010_09_13; SNG2010_09_14; SNG2010_09_15; SNG2010_09_16; SNG2010_09_17; SNG2010_09_18; SNG2010_09_19; SNG2010_09_2; SNG2010_09_20; SNG2010_09_21; SNG2010_09_22; SNG2010_09_23; SNG2010_09_24; SNG2010_09_25; SNG2010_09_26; SNG2010_09_27; SNG2010_09_28; SNG2010_09_29; SNG2010_09_3; SNG2010_09_30; SNG2010_09_31; SNG2010_09_32; SNG2010_09_33; SNG2010_09_34; SNG2010_09_35; SNG2010_09_36; SNG2010_09_37; SNG2010_09_38; SNG2010_09_39; SNG2010_09_4; SNG2010_09_40; SNG2010_09_41; SNG2010_09_42; SNG2010_09_43; SNG2010_09_44; SNG2010_09_45; SNG2010_09_5; SNG2010_09_6; SNG2010_09_7; SNG2010_09_8; SNG2010_09_9; Station label; WIMO; Wissenschaftliche Monitoringkonzepte für die Deutsche Bucht
    Type: Dataset
    Format: text/tab-separated-values, 495 data points
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  • 7
    Publication Date: 2024-02-16
    Keywords: Advanced sand sedimentation analyzer, MacroGranometer™; Area/locality; Calculated on moments; Calculated on percentils (Inman 1952); Comment; DATE/TIME; DEPTH, sediment/rock; Grain size, mean; Kurtosis; LATITUDE; LONGITUDE; North Sea; Principal investigator; Sample, optional label/labor no; Sample code/label; Senckenberg; Size fraction 0.037-0.032 mm, 4.75-5.00 phi; Size fraction 0.044-0.037 mm, 4.50-4.75 phi; Size fraction 0.053-0.044 mm, 4.25-4.50 phi; Size fraction 0.063-0.053 mm, 4.00-4.25 phi; Size fraction 0.074-0.063 mm, 3.75-4.00 phi; Size fraction 0.088-0.074 mm, 3.50-3.75 phi; Size fraction 0.105-0.088 mm, 3.25-3.50 phi; Size fraction 0.125-0.105 mm, 3.00-3.25 phi; Size fraction 0.149-0.125 mm, 2.75-3.00 phi; Size fraction 0.177-0.149 mm, 2.50-2.75 phi; Size fraction 0.210-0.177 mm, 2.25-2.50 phi; Size fraction 0.250-0.210 mm, 2.00-2.25 phi; Size fraction 0.297-0.250 mm, 1.75-2.00 phi; Size fraction 0.354-0.297 mm, 1.50-1.75 phi; Size fraction 0.420-0.354 mm, 1.25-1.50 phi; Size fraction 0.500-0.420 mm, 1.00-1.25 phi; Size fraction 0.595-0.500 mm, 0.75-1.00 phi; Size fraction 0.707-0.595 mm, 0.50-0.75 phi; Size fraction 0.841-0.707 mm, 0.25-0.50 phi; Size fraction 1.000-0.841 mm, 0.00-0.25 phi; Size fraction 1.189-1.000 mm, (-0.25) to (-0.00) phi; Size fraction 1.414-1.189 mm, (-0.50) to (-0.25) phi; Size fraction 1.682-1.414 mm, (-0.75) to (-0.50) phi; Size fraction 2.000-1.682 mm, (-1.00) to (-0.75) phi; Size fraction 2.378-2.000 mm, (-1.25) to (-1.00) phi; Size fraction 2.828-2.378 mm, (-1.50) to (-1.25) phi; Size fraction 3.364-2.828 mm, (-1.75) to (-1.50) phi; Size fraction 4.000-3.364 mm, (-2.00) to (-1.75) phi; Skewness; Sorting, standard deviation; Spiekeroog; SpiekeroogSurface1985-1991; Temperature, technical; van Veen Grab; VGRAB
    Type: Dataset
    Format: text/tab-separated-values, 51583 data points
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  • 8
    Publication Date: 2024-02-16
    Keywords: Advanced sand sedimentation analyzer, MacroGranometer™; Area/locality; Calculated on moments; Calculated on percentils (Inman 1952); Comment; DATE/TIME; DEPTH, sediment/rock; Kurtosis; LATITUDE; LONGITUDE; North Sea; Principal investigator; Sample, optional label/labor no; Sample code/label; Senckenberg; Settling velocity, mean; Settling velocity fraction (-0.25) - (-0.00) psi; Settling velocity fraction (-0.50) - (-0.25) psi; Settling velocity fraction (-0.75) - (-0.50) psi; Settling velocity fraction (-1.00) - (-0.75) psi; Settling velocity fraction (-1.25) - (-1.00) psi; Settling velocity fraction (-1.50) - (-1.25) psi; Settling velocity fraction (-1.75) - (-1.50) psi; Settling velocity fraction (-2.00) - (-1.75) psi; Settling velocity fraction (-2.25) - (-2.00) psi; Settling velocity fraction (-2.50) - (-2.25) psi; Settling velocity fraction (-2.75) - (-2.50) psi; Settling velocity fraction (-3.00) - (-2.75) psi; Settling velocity fraction (-3.25) - (-3.00) psi; Settling velocity fraction (-3.50) - (-3.25) psi; Settling velocity fraction (-3.75) - (-3.50) psi; Settling velocity fraction (-4.00) - (-3.75) psi; Settling velocity fraction (-4.25) - (-4.00) psi; Settling velocity fraction (-4.50) - (-4.25) psi; Settling velocity fraction (-4.75) - (-4.50) psi; Settling velocity fraction (-5.00) - (-4.75) psi; Settling velocity fraction 0.00 - 0.25 psi; Settling velocity fraction 0.25 - 0.50 psi; Settling velocity fraction 0.50 - 0.75 psi; Settling velocity fraction 0.75 - 1.00 psi; Settling velocity fraction 1.00 - 1.25 psi; Settling velocity fraction 1.25 - 1.50 psi; Settling velocity fraction 1.50 - 1.75 psi; Settling velocity fraction 1.75 - 2.00 psi; Settling velocity fraction 2.00 - 2.25 psi; Settling velocity fraction 2.25 - 2.50 psi; Settling velocity fraction 2.50 - 2.75 psi; Settling velocity fraction 2.75 - 3.00 psi; Settling velocity fraction 3.00 - 3.25 psi; Settling velocity fraction 3.25 - 3.50 psi; Settling velocity fraction 3.50 - 3.75 psi; Settling velocity fraction 3.75 - 4.00 psi; Skewness; Sorting, standard deviation; Spiekeroog; SpiekeroogSurface1985-1991; Temperature, technical; van Veen Grab; VGRAB
    Type: Dataset
    Format: text/tab-separated-values, 67132 data points
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  • 9
    Publication Date: 2024-02-16
    Keywords: Advanced sand sedimentation analyzer, MacroGranometer™; Area/locality; Calculated on moments; Calculated on percentils (Inman 1952); Comment; DATE/TIME; DEPTH, sediment/rock; Kurtosis; LATITUDE; LONGITUDE; North Sea; Principal investigator; Sample, optional label/labor no; Sample code/label; Senckenberg; Settling velocity, mean; Settling velocity fraction (-0.25) - (-0.00) psi; Settling velocity fraction (-0.50) - (-0.25) psi; Settling velocity fraction (-0.75) - (-0.50) psi; Settling velocity fraction (-1.00) - (-0.75) psi; Settling velocity fraction (-1.25) - (-1.00) psi; Settling velocity fraction (-1.50) - (-1.25) psi; Settling velocity fraction (-1.75) - (-1.50) psi; Settling velocity fraction (-2.00) - (-1.75) psi; Settling velocity fraction (-2.25) - (-2.00) psi; Settling velocity fraction (-2.50) - (-2.25) psi; Settling velocity fraction (-2.75) - (-2.50) psi; Settling velocity fraction (-3.00) - (-2.75) psi; Settling velocity fraction (-3.25) - (-3.00) psi; Settling velocity fraction (-3.50) - (-3.25) psi; Settling velocity fraction (-3.75) - (-3.50) psi; Settling velocity fraction (-4.00) - (-3.75) psi; Settling velocity fraction (-4.25) - (-4.00) psi; Settling velocity fraction (-4.50) - (-4.25) psi; Settling velocity fraction (-4.75) - (-4.50) psi; Settling velocity fraction (-5.00) - (-4.75) psi; Settling velocity fraction 0.00 - 0.25 psi; Settling velocity fraction 0.25 - 0.50 psi; Settling velocity fraction 0.50 - 0.75 psi; Settling velocity fraction 0.75 - 1.00 psi; Settling velocity fraction 1.00 - 1.25 psi; Settling velocity fraction 1.25 - 1.50 psi; Settling velocity fraction 1.50 - 1.75 psi; Settling velocity fraction 1.75 - 2.00 psi; Settling velocity fraction 2.00 - 2.25 psi; Settling velocity fraction 2.25 - 2.50 psi; Settling velocity fraction 2.50 - 2.75 psi; Settling velocity fraction 2.75 - 3.00 psi; Skewness; Sorting, standard deviation; Spiekeroog; SpiekeroogSurface1985-1991; Temperature, technical; van Veen Grab; VGRAB
    Type: Dataset
    Format: text/tab-separated-values, 63848 data points
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  • 10
    Publication Date: 2024-02-16
    Keywords: Advanced sand sedimentation analyzer, MacroGranometer™; Area/locality; Calculated on moments; Calculated on percentils (Inman 1952); Comment; DATE/TIME; DEPTH, sediment/rock; Kurtosis; LATITUDE; LONGITUDE; North Sea; Principal investigator; Sample, optional label/labor no; Sample code/label; Senckenberg; Settling velocity, mean; Settling velocity fraction (-0.25) - (-0.00) psi; Settling velocity fraction (-0.50) - (-0.25) psi; Settling velocity fraction (-0.75) - (-0.50) psi; Settling velocity fraction (-1.00) - (-0.75) psi; Settling velocity fraction (-1.25) - (-1.00) psi; Settling velocity fraction (-1.50) - (-1.25) psi; Settling velocity fraction (-1.75) - (-1.50) psi; Settling velocity fraction (-2.00) - (-1.75) psi; Settling velocity fraction (-2.25) - (-2.00) psi; Settling velocity fraction (-2.50) - (-2.25) psi; Settling velocity fraction (-2.75) - (-2.50) psi; Settling velocity fraction (-3.00) - (-2.75) psi; Settling velocity fraction (-3.25) - (-3.00) psi; Settling velocity fraction (-3.50) - (-3.25) psi; Settling velocity fraction (-3.75) - (-3.50) psi; Settling velocity fraction (-4.00) - (-3.75) psi; Settling velocity fraction (-4.25) - (-4.00) psi; Settling velocity fraction (-4.50) - (-4.25) psi; Settling velocity fraction (-4.75) - (-4.50) psi; Settling velocity fraction (-5.00) - (-4.75) psi; Settling velocity fraction 0.00 - 0.25 psi; Settling velocity fraction 0.25 - 0.50 psi; Settling velocity fraction 0.50 - 0.75 psi; Settling velocity fraction 0.75 - 1.00 psi; Settling velocity fraction 1.00 - 1.25 psi; Settling velocity fraction 1.25 - 1.50 psi; Settling velocity fraction 1.50 - 1.75 psi; Settling velocity fraction 1.75 - 2.00 psi; Settling velocity fraction 2.00 - 2.25 psi; Settling velocity fraction 2.25 - 2.50 psi; Settling velocity fraction 2.50 - 2.75 psi; Settling velocity fraction 2.75 - 3.00 psi; Settling velocity fraction 3.00 - 3.25 psi; Settling velocity fraction 3.25 - 3.50 psi; Settling velocity fraction 3.50 - 3.75 psi; Settling velocity fraction 3.75 - 4.00 psi; Skewness; Sorting, standard deviation; Spiekeroog; SpiekeroogSurface1985-1991; Temperature, technical; van Veen Grab; VGRAB
    Type: Dataset
    Format: text/tab-separated-values, 64395 data points
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