Coastal erosion vs riverine sediment discharge in the Arctic Shelf seas.

Rachold, Volker, Grigoriev, Mikhail N., Are, Felix E., Solomon, Steve, Reimnitz, Erk, Kassens, Heidemarie and Antonow, Martin (2000) Coastal erosion vs riverine sediment discharge in the Arctic Shelf seas. International Journal of Earth Sciences, 89 (3). pp. 450-460. DOI 10.1007/s005310000113.

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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 (64.45x10(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.

Document Type: Article
Additional Information: WOS:000166020600002
Keywords: Laptev Sea; Beaufort Sea; Coastal erosion; Fluvial sediment discharge; Sediment budget; Canadian Beaufort Sea; Ice; Ocean circulation; Permafrost; Topography; Evolution; Nutrients; Transport
Research affiliation: AWI
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1007/s005310000113
ISSN: 1437-3254
Projects: Laptev Sea System
Date Deposited: 13 Jan 2015 12:41
Last Modified: 28 May 2018 10:25
URI: http://oceanrep.geomar.de/id/eprint/26933

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