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...
Published in: | Earth Surface Processes and Landforms |
---|---|
Main Authors: | , |
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 |
_version_ | 1832468634139623424 |
---|---|
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 |
id | ftcopenhagenunip:oai:pure.atira.dk:publications/7997ac07-2645-4902-9b42-e271477d2bab |
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 |
record_format | openpolar |
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 |