Conceptualizing delta forms and processes in Arctic coastal environments

Climate warming in the Arctic directly causes two opposite changes in Arctic coastal systems: increased melt-water discharge through rivers induces extra influx of sediments and extended open water season increases wave impact which reworks and erodes the shores. A shoreline change analysis along th...

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Published in:Earth Surface Processes and Landforms
Main Authors: Bendixen, Mette, Kroon, Aart
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
Online Access:https://researchprofiles.ku.dk/da/publications/7997ac07-2645-4902-9b42-e271477d2bab
https://doi.org/10.1002/esp.4097
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author Bendixen, Mette
Kroon, Aart
author_facet Bendixen, Mette
Kroon, Aart
author_sort Bendixen, Mette
collection University of Copenhagen: Research
container_issue 8
container_start_page 1227
container_title Earth Surface Processes and Landforms
container_volume 42
description Climate warming in the Arctic directly causes two opposite changes in Arctic coastal systems: increased melt-water discharge through rivers induces extra influx of sediments and extended open water season increases wave impact which reworks and erodes the shores. A shoreline change analysis along the southern coast of Disko Island in western Greenland was conducted with aerial photographs and satellite images from 1964, 1985, and 2012. The decadal morphologic evolution of this 85km section showed that large parts of the coast had undergone very limited changes. However, two deltas were highly dynamic and popped up as hotspots. The Tuapaat delta and Skansen delta showed large progradation rates (1.5 and 7m/yr) and migration of the adjacent barriers and spits. The dynamic behavior at the delta mouths was mainly caused by classic delta channel lobe switching at one delta (Tuapaat), and by a breach of the fringing spit at the other delta (Skansen). The longshore and cross-shore transports are responsible for reworking the sediment with a result of migrating delta mouths and adjacent subaqueous mouth bars. Seaward progradation of the deltas is limited due to the steep nature of the bathymetry in Disko Bay. Finally, a schematic conceptual overview of processes and associated morphological responses for deltas in Arctic environments is presented, including the climate drivers affecting delta evolution.
format Article in Journal/Newspaper
genre Arctic
Arctic
Disko Bay
Greenland
genre_facet Arctic
Arctic
Disko Bay
Greenland
geographic Arctic
Greenland
Tuapaat
Skansen
geographic_facet Arctic
Greenland
Tuapaat
Skansen
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institution Open Polar
language English
long_lat ENVELOPE(-44.123,-44.123,59.856,59.856)
ENVELOPE(9.297,9.297,62.646,62.646)
op_collection_id ftcopenhagenunip
op_container_end_page 1237
op_doi https://doi.org/10.1002/esp.4097
op_rights info:eu-repo/semantics/closedAccess
op_source Bendixen , M & Kroon , A 2017 , ' Conceptualizing delta forms and processes in Arctic coastal environments ' , Earth Surface Processes and Landforms , vol. 42 , no. 8 , pp. 1227–1237 . https://doi.org/10.1002/esp.4097
publishDate 2017
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spelling ftcopenhagenunip:oai:pure.atira.dk:publications/7997ac07-2645-4902-9b42-e271477d2bab 2025-05-18T13:56:40+00:00 Conceptualizing delta forms and processes in Arctic coastal environments Bendixen, Mette Kroon, Aart 2017 https://researchprofiles.ku.dk/da/publications/7997ac07-2645-4902-9b42-e271477d2bab https://doi.org/10.1002/esp.4097 eng eng info:eu-repo/semantics/closedAccess Bendixen , M & Kroon , A 2017 , ' Conceptualizing delta forms and processes in Arctic coastal environments ' , Earth Surface Processes and Landforms , vol. 42 , no. 8 , pp. 1227–1237 . https://doi.org/10.1002/esp.4097 Arctic Coastal evolution Deltas Digital Shoreline Analysis System (DSAS) Shoreline change article 2017 ftcopenhagenunip https://doi.org/10.1002/esp.4097 2025-04-23T15:53:08Z Climate warming in the Arctic directly causes two opposite changes in Arctic coastal systems: increased melt-water discharge through rivers induces extra influx of sediments and extended open water season increases wave impact which reworks and erodes the shores. A shoreline change analysis along the southern coast of Disko Island in western Greenland was conducted with aerial photographs and satellite images from 1964, 1985, and 2012. The decadal morphologic evolution of this 85km section showed that large parts of the coast had undergone very limited changes. However, two deltas were highly dynamic and popped up as hotspots. The Tuapaat delta and Skansen delta showed large progradation rates (1.5 and 7m/yr) and migration of the adjacent barriers and spits. The dynamic behavior at the delta mouths was mainly caused by classic delta channel lobe switching at one delta (Tuapaat), and by a breach of the fringing spit at the other delta (Skansen). The longshore and cross-shore transports are responsible for reworking the sediment with a result of migrating delta mouths and adjacent subaqueous mouth bars. Seaward progradation of the deltas is limited due to the steep nature of the bathymetry in Disko Bay. Finally, a schematic conceptual overview of processes and associated morphological responses for deltas in Arctic environments is presented, including the climate drivers affecting delta evolution. Article in Journal/Newspaper Arctic Arctic Disko Bay Greenland University of Copenhagen: Research Arctic Greenland Tuapaat ENVELOPE(-44.123,-44.123,59.856,59.856) Skansen ENVELOPE(9.297,9.297,62.646,62.646) Earth Surface Processes and Landforms 42 8 1227 1237
spellingShingle Arctic
Coastal evolution
Deltas
Digital Shoreline Analysis System (DSAS)
Shoreline change
Bendixen, Mette
Kroon, Aart
Conceptualizing delta forms and processes in Arctic coastal environments
title Conceptualizing delta forms and processes in Arctic coastal environments
title_full Conceptualizing delta forms and processes in Arctic coastal environments
title_fullStr Conceptualizing delta forms and processes in Arctic coastal environments
title_full_unstemmed Conceptualizing delta forms and processes in Arctic coastal environments
title_short Conceptualizing delta forms and processes in Arctic coastal environments
title_sort conceptualizing delta forms and processes in arctic coastal environments
topic Arctic
Coastal evolution
Deltas
Digital Shoreline Analysis System (DSAS)
Shoreline change
topic_facet Arctic
Coastal evolution
Deltas
Digital Shoreline Analysis System (DSAS)
Shoreline change
url https://researchprofiles.ku.dk/da/publications/7997ac07-2645-4902-9b42-e271477d2bab
https://doi.org/10.1002/esp.4097