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  • 1
    Digitale Medien
    Digitale Medien
    Coastal erosion vs riverine sediment discharge in the Arctic Shelf seas (2000)
    Springer
    International journal of earth sciences 89 (2000), S. 450-460 
    Details
    ISSN: 1437-3262
    Schlagwort(e): Laptev Sea Beaufort Sea Coastal erosion Fluvial sediment discharge Sediment budget
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract. This article presents a comparison of sediment input by rivers and by coastal erosion into both the Laptev Sea and the Canadian Beaufort Sea (CBS). New data on coastal erosion in the Laptev Sea, which are based on field measurements and remote sensing information, and existing data on coastal erosion in the CBS as well as riverine sediment discharge into both the Laptev Sea and the CBS are included. Strong regional differences in the percentages of coastal erosion and riverine sediment supply are observed. The CBS is dominated by the riverine sediment discharge (64.45×106 t a–1) mainly of the Mackenzie River, which is the largest single source of sediments in the Arctic. Riverine sediment discharge into the Laptev Sea amounts to 24.10×106 t a–1, more than 70% of which are related to the Lena River. In comparison with the CBS, the Laptev Sea coast on average delivers approximately twice as much sediment mass per kilometer, a result of higher erosion rates due to higher cliffs and seasonal ice melting. In the Laptev Sea sediment input by coastal erosion (58.4×106 t a–1) is therefore more important than in the CBS and the ratio between riverine and coastal sediment input amounts to 0.4. Coastal erosion supplying 5.6×106 t a–1 is less significant for the sediment budget of the CBS where riverine sediment discharge exceeds coastal sediment input by a factor of ca. 10.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s005310000113
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 2
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    The Arctic Coastal Dynamics Database: A New Classification Scheme and Statistics on Arctic Permafrost Coastlines (2011)
    Springer
    Details
    Publikationsdatum: 2011-02-01
    Print ISSN: 1559-2723
    Digitale ISSN: 1559-2731
    Thema: Geographie
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 3
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    Coastal erosion vs riverine sediment discharge in the Arctic Shelf seas (2000)
    Springer
    Details
    Publikationsdatum: 2000-12-13
    Print ISSN: 1437-3254
    Digitale ISSN: 1437-3262
    Thema: Geologie und Paläontologie
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 4
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    The shape of erosional arctic shoreface profiles (2005)
    AWI, Alfred-Wegener-Institut für Polar- und Meeresforschung
    In:  In: Arctic Coastal Dynamics : Report of the 5th International Workshop, McGill University, Montreal (Canada), 13-16 October 2004. , ed. by Rachold, V., Lantuit, H., Couture, N. and Pollard, W. Berichte zur Polar- und Meeresforschung, 506 . AWI, Alfred-Wegener-Institut für Polar- und Meeresforschung, Montreal, Canada, pp. 24-27.
    Details
    Publikationsdatum: 2020-10-16
    Materialart: Book chapter , NonPeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OCEANREP)
  • 5
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    Coastal erosion vs riverine sediment discharge in the Arctic Shelf seas (2000)
    Springer
    In:  International Journal of Earth Sciences, 89 (3). pp. 450-460.
    Details
    Publikationsdatum: 2019-09-23
    Beschreibung: This article presents a comparison of sediment input by rivers and by coastal erosion into both the Laptev Sea and the Canadian Beaufort Sea (CBS). New data on coastal erosion in the Laptev Sea, which are based on field measurements and remote sensing information, and existing data on coastal erosion in the CBS as well as riverine sediment discharge into both the Laptev Sea and the CBS are included. Strong regional differences in the percentages of coastal erosion and riverine sediment supply are observed. The CBS is dominated by the riverine sediment discharge (64.45x10(6) t a(-1)) mainly of the Mackenzie River, which is the largest single source of sediments in the Arctic. Riverine sediment discharge into the Laptev Sea amounts to 24.10x10(6) t a(-1), more than 70% of which an related to the Lena River. In comparison with the CBS, the Laptev Sea coast on average delivers approximately twice as much sediment mass per kilometer, a result of higher erosion rates due to higher cliffs and seasonal ice melting. Ln the Laptev Sea sediment input by coastal erosion (58.4x10(6) t a(-1)) is therefore more important than in the CBS and the ratio between riverine and coastal sediment input amounts to 0.4. Coastal erosion supplying 5.6x10(6) t a(-1) is less significant for the sediment budget of the CBS where riverine sediment discharge exceeds coastal sediment input by a factor of ca. 10.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OCEANREP)
  • 6
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    Shoreface of the Arctic seas - a natural laboratory for subsea permafrost dynamics (2003)
    Balkema
    In:  In: Permafrost: Proceedings of the 8th International Conference on Permafrost, 21-25 July 2003, Zurich, Switzerland. , ed. by Phillips, M., Springman, S. M. and Arenson, L. U. Balkema, Lisse, The Netherlands, pp. 27-32. ISBN 90-5809-584-3
    Details
    Publikationsdatum: 2015-02-10
    Beschreibung: Subsea permafrost on the Arctic shelf occupies some 13 million km2, but is poorly understood. Mathematical modeling, based on the differential equation of heat conduction, is widely used for the compilation of predictive permafrost maps. Realistic geocryological conditions on the Arctic shelf cannot however be explained simply by heat conduction. Laboratory and field investigations show that heat convection and mass transfer play an important role in marine permafrost dynamics. Correspondingly, mathematical models are not yet developed, not only because of the complexity of the problem, but due to a limited understanding of subsea permafrost properties. Comprehensive experimental investigations of subsea permafrost are therefore required. The shoreface of erosional coasts are ideal locations for field investigations, as the distance from the retreating shore seaward represents a time scale, and degradation of the submerged permafrost may be traced from its inception.
    Materialart: Book chapter , NonPeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OCEANREP)
  • 7
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    Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1)
    PANGAEA
    In:  Supplement to: Are, Felix; Grigoriev, Mikhail N; Hubberten, Hans-Wolfgang; Rachold, Volker; Razumov, Sergey O; Schneider, Waldemar (2002): Comparative shoreface evolution along the Laptev Sea coast. Polarforschung, 70, 135-150, hdl:10013/epic.29866.d001
    Details
    Publikationsdatum: 2023-05-12
    Beschreibung: Field investigations of the Laptev Sea shoreface morphology were carried out (1) off erosional shores composed of unconsolidated sediments, (2) off the modern delta shores of the Lena River, and (3) off rocky shores. It was found that profiles off erosional shores had a concave shape. This shape is not well described by commonly applied power functions, a feature, which is in disagreement with the generally accepted concept of the equilibrium shape of shoreface profiles. The position of the lower shoreface boundary is determined by the elevation of the coastal lowland inundated during the last transgression (at -5 to -10 m) and may easily be recognized by a sharp, an order of magnitude decrease in the mean inclination of the sea floor. The mean shoreface inclination depends on sediment grain-size and ranges from 0.0022 to 0.033. The concave shape of the shoreface did not change substantially during the last 20-30 years, which indicates that shoreline retreat did not slow down and hence suggests continued intensive coastal erosion in the 21st century. The underwater part of the Lena River delta extends up to 35 km offshore. Its upper part is formed by a shallow and up to 18-km wide bench, which reaches depths of 2-3 m along the outer edge. The evolution of the delta was irregular. Whereas some parts of the delta are advancing rapidly (58 m/year), other parts are eroding. Comparison of measured profiles with older bathymetric data gave an opportunity to evaluate the changes of the underwater delta over past decades. Bathymetric surveys of the seabed around the delta can thus contribute towards a quantification of the sediment budget of the river-sea system. In addition, some sections of the Laptev Sea coast are composed of bedrock that has a comparatively low resistance to wave erosion. These sections may supply a considerable amount of sediment, especially if the cliffs are high. This source must therefore also be taken into account when assessing the contribution of shore erosion to the Laptev Sea sediment budget.
    Schlagwort(e): Area/locality; Inclination; Laptev Sea System; LATITUDE; Lithology/composition/facies; LONGITUDE; LSS; Measured; Shoreface depth; Visual description; Width
    Materialart: Dataset
    Format: text/tab-separated-values, 104 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
  • 8
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    The ACD Classification of Arctic Coasts (2020)
    PANGAEA
    Details
    Publikationsdatum: 2023-07-19
    Beschreibung: An important outcome of Arctic Coastal Dynamics I was the segmentation and characterization of the entire circum-Arctic coastline by regional experts which is presented in this dataset. This dataset contains data on coastal morphology, composition, dominant processes, ground ice, and environmental forcing parameters such as wind speed, storm counts, melt season, and wave energy. A listing of the variables included in the coastal classification can be found in Appendix A of the ACD II Science and Implementation Plan (2006). This information is available for over 800 segments, covering the coastline of all eight regional seas of the Arctic Ocean. The length of individual segments is variable (median length is 38 km), and depends on classification parameters and data availability. The segmentation format is scalable, allowing the adoption of future digital coastlines and the integration of additional data at higher spatial resolution. An assessment of the data quality for the more important quantitative variables has just been completed and the data will be publicly released on an internet map server (IMS). The goal of the IMS will be to allow individual users to prepare their own maps displaying the region and variables of interest. The ACD Classification was conceived as a broad enough framework to encompass existing classification schemes while capturing fundamental information for the assessment of climate change impacts and coastal processes. The implementation of the classification was done by so-called "regional experts", who, based on digital and paper products and personal knowledge provided information which was subsequently gathered into a circum-Arctic coastal database. The classification was primarily geomorphological in nature and considered: (1) the shape or form of the subaerial part of the coastal tract, (2) the marine processes acting upon the coast, (3) the shape or the form of the subaqueous part of the coastal tract and (4) the lithofacies of the materials constituting the coastal zone The beta version of the classification is made of 1331 segments each characterized by a series of geomorphological quantitative and qualitative variables. The classification is stored as an ISO 19115-compliant personal geodatabase and is therefore mappable in off-the-shelf Geographical Information Systems (GIS)
    Schlagwort(e): ACD; Arctic; Arctic_Perma; arctic coastal dynamics; Arctic Coastal Dynamics; AWI_PerDyn; AWI_Perma; Coastal erosion; File content; File format; File name; File size; ground ice; PERM; Permafrost; Permafrost Research; Permafrost Research (Periglacial Dynamics) @ AWI; Sampling permafrost; Uniform resource locator/link to file
    Materialart: Dataset
    Format: text/tab-separated-values, 10 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
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