Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach
Remote sensing can be helpful in defining the dynamic of a high-latitude coastal environment where the role of cryogenic processes like sea-ice or permafrost are the main drivers together with storm surge and wind action. Here we examined the geomorphological dynamics of a beach located at Edmonson...
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ftmdpi:oai:mdpi.com:/2072-4292/13/3/518/ 2023-08-20T04:00:13+02:00 Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach Stefano Ponti Mauro Guglielmin agris 2021-02-01 application/pdf https://doi.org/10.3390/rs13030518 EN eng Multidisciplinary Digital Publishing Institute Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs13030518 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 13; Issue 3; Pages: 518 beach processes coastal storm coastal geomorphology sea ice Antarctica Text 2021 ftmdpi https://doi.org/10.3390/rs13030518 2023-08-01T00:59:06Z Remote sensing can be helpful in defining the dynamic of a high-latitude coastal environment where the role of cryogenic processes like sea-ice or permafrost are the main drivers together with storm surge and wind action. Here we examined the geomorphological dynamics of a beach located at Edmonson Point (74° S) not far from the Italian Antarctic Station “Mario Zucchelli” between 1993 and 2019 using different remote sensing techniques and field measurements. Our data demonstrate that the average rate of surficial increase of the beach (0.002 ± 0.032 m yr−1) was slightly higher than the uplift rate determined by previous authors (0–1 cm yr−1) in case of pure isostatic rebound. However, we suggest that the evolution of EPNB is likely due to the couple effect of vertical uplift and high wave-energy events. Indeed, the coastline accumulation could be related to the subsurface sea water infiltration and annually freezing at the permafrost table interface as aggradational ice as suggested by the ERT carried out in 1996. This ERT suggests the occurrence of saline frozen permafrost or hypersaline brines under the sea level while permafrost with ice occurred above the sea level. The beach also revealed areas that had quite high subsidence values (between 0.08 and 0.011 m yr−1) located in the area where ice content was higher in 1996 and where the active layer thickening and wind erosion could explain the measured erosion rates. Here, we also dated at the late morning of 15 February 2019 coastal flooding and defined a significant wave height of 1.95 m. During the high oceanic wave event the sea level increased advancing shoreward up to 360 m, three times higher than the previous reported storm surge (81 m) and with a sea level rise almost five times higher than has been previously recorded in the Ross Sea. Text Antarc* Antarctic Antarctic Ocean Antarctica Ice permafrost Ross Sea Sea ice MDPI Open Access Publishing Antarctic Ross Sea Antarctic Ocean Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) Edmonson Point ENVELOPE(165.133,165.133,-74.333,-74.333) Remote Sensing 13 3 518 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
beach processes coastal storm coastal geomorphology sea ice Antarctica |
spellingShingle |
beach processes coastal storm coastal geomorphology sea ice Antarctica Stefano Ponti Mauro Guglielmin Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach |
topic_facet |
beach processes coastal storm coastal geomorphology sea ice Antarctica |
description |
Remote sensing can be helpful in defining the dynamic of a high-latitude coastal environment where the role of cryogenic processes like sea-ice or permafrost are the main drivers together with storm surge and wind action. Here we examined the geomorphological dynamics of a beach located at Edmonson Point (74° S) not far from the Italian Antarctic Station “Mario Zucchelli” between 1993 and 2019 using different remote sensing techniques and field measurements. Our data demonstrate that the average rate of surficial increase of the beach (0.002 ± 0.032 m yr−1) was slightly higher than the uplift rate determined by previous authors (0–1 cm yr−1) in case of pure isostatic rebound. However, we suggest that the evolution of EPNB is likely due to the couple effect of vertical uplift and high wave-energy events. Indeed, the coastline accumulation could be related to the subsurface sea water infiltration and annually freezing at the permafrost table interface as aggradational ice as suggested by the ERT carried out in 1996. This ERT suggests the occurrence of saline frozen permafrost or hypersaline brines under the sea level while permafrost with ice occurred above the sea level. The beach also revealed areas that had quite high subsidence values (between 0.08 and 0.011 m yr−1) located in the area where ice content was higher in 1996 and where the active layer thickening and wind erosion could explain the measured erosion rates. Here, we also dated at the late morning of 15 February 2019 coastal flooding and defined a significant wave height of 1.95 m. During the high oceanic wave event the sea level increased advancing shoreward up to 360 m, three times higher than the previous reported storm surge (81 m) and with a sea level rise almost five times higher than has been previously recorded in the Ross Sea. |
format |
Text |
author |
Stefano Ponti Mauro Guglielmin |
author_facet |
Stefano Ponti Mauro Guglielmin |
author_sort |
Stefano Ponti |
title |
Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach |
title_short |
Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach |
title_full |
Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach |
title_fullStr |
Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach |
title_full_unstemmed |
Shore Evidences of a High Antarctic Ocean Wave Event: Geomorphology, Event Reconstruction and Coast Dynamics through a Remote Sensing Approach |
title_sort |
shore evidences of a high antarctic ocean wave event: geomorphology, event reconstruction and coast dynamics through a remote sensing approach |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/rs13030518 |
op_coverage |
agris |
long_lat |
ENVELOPE(164.123,164.123,-74.695,-74.695) ENVELOPE(165.133,165.133,-74.333,-74.333) |
geographic |
Antarctic Ross Sea Antarctic Ocean Mario Zucchelli Edmonson Point |
geographic_facet |
Antarctic Ross Sea Antarctic Ocean Mario Zucchelli Edmonson Point |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica Ice permafrost Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica Ice permafrost Ross Sea Sea ice |
op_source |
Remote Sensing; Volume 13; Issue 3; Pages: 518 |
op_relation |
Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs13030518 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs13030518 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
3 |
container_start_page |
518 |
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1774717093914083328 |