The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply
Remote sensing, and unmanned aerial vehicles (UAVs) in particular, can be a valid tool for assessing the dynamics of cryotic features as frost blisters and to monitor the surface changes and the sublimation rates on perennially frozen lakes that host important ecosystems. In this paper, through the...
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ftopenaccessrep:oai:zenodo.org:157414 2024-05-12T07:54:12+00:00 The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply Ponti, Stefano Scipinotti, Riccardo Pierattini, Samuele Guglielmin, Mauro 2021-01-27 https://www.openaccessrepository.it/record/157414 https://doi.org/10.3390/rs13030435 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/157414 doi:10.3390/rs13030435 info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by General Earth and Planetary Sciences info:eu-repo/semantics/article publication-article 2021 ftopenaccessrep https://doi.org/10.3390/rs13030435 2024-04-17T14:53:40Z Remote sensing, and unmanned aerial vehicles (UAVs) in particular, can be a valid tool for assessing the dynamics of cryotic features as frost blisters and to monitor the surface changes and the sublimation rates on perennially frozen lakes that host important ecosystems. In this paper, through the use of these remote sensing techniques, we aim to understand the type of groundwater supply of an Antarctic perennial frozen lake that encompasses two frost blisters (M1 and M2) through the temporal analysis of the features' elevation changes (frost blisters and lake ice level). The frozen lake is located at Boulder Clay (northern Victoria Land, Antarctica). We relied on several photogrammetric models, past satellite images and ground pictures to conduct differencing of digital elevation models, areal variations and pixel counting. In addition, in situ measurements of the ice sublimation or snow accumulation were carried out. The two frost blisters showed different elevation trends with M1 higher in the past (1996–2004) than recently (2014–2019), while M2 showed an opposite trend, similarly to the ice level. Indeed, the linear regression between M2 elevation changes and the ice level variation was statistically significant, as well as with the annual thawing degree days, while M1 did not show significant results. From these results we can infer that the groundwater supply of M1 can be related to a sublake open talik (hydraulic system) as confirmed also by pressurized brines found below M1, during a drilling in summer 2019. For M2 the groundwater flow is still not completely clear although the hydrostatic system seems the easiest explanation as well as for the uplift of the lake ice. Article in Journal/Newspaper Antarc* Antarctic Antarctica Victoria Land Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic Frozen Lake ENVELOPE(76.108,76.108,-69.415,-69.415) Talik ENVELOPE(146.601,146.601,59.667,59.667) The Antarctic Victoria Land Remote Sensing 13 3 435 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Ponti, Stefano Scipinotti, Riccardo Pierattini, Samuele Guglielmin, Mauro The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply |
topic_facet |
General Earth and Planetary Sciences |
description |
Remote sensing, and unmanned aerial vehicles (UAVs) in particular, can be a valid tool for assessing the dynamics of cryotic features as frost blisters and to monitor the surface changes and the sublimation rates on perennially frozen lakes that host important ecosystems. In this paper, through the use of these remote sensing techniques, we aim to understand the type of groundwater supply of an Antarctic perennial frozen lake that encompasses two frost blisters (M1 and M2) through the temporal analysis of the features' elevation changes (frost blisters and lake ice level). The frozen lake is located at Boulder Clay (northern Victoria Land, Antarctica). We relied on several photogrammetric models, past satellite images and ground pictures to conduct differencing of digital elevation models, areal variations and pixel counting. In addition, in situ measurements of the ice sublimation or snow accumulation were carried out. The two frost blisters showed different elevation trends with M1 higher in the past (1996–2004) than recently (2014–2019), while M2 showed an opposite trend, similarly to the ice level. Indeed, the linear regression between M2 elevation changes and the ice level variation was statistically significant, as well as with the annual thawing degree days, while M1 did not show significant results. From these results we can infer that the groundwater supply of M1 can be related to a sublake open talik (hydraulic system) as confirmed also by pressurized brines found below M1, during a drilling in summer 2019. For M2 the groundwater flow is still not completely clear although the hydrostatic system seems the easiest explanation as well as for the uplift of the lake ice. |
format |
Article in Journal/Newspaper |
author |
Ponti, Stefano Scipinotti, Riccardo Pierattini, Samuele Guglielmin, Mauro |
author_facet |
Ponti, Stefano Scipinotti, Riccardo Pierattini, Samuele Guglielmin, Mauro |
author_sort |
Ponti, Stefano |
title |
The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply |
title_short |
The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply |
title_full |
The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply |
title_fullStr |
The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply |
title_full_unstemmed |
The Spatio-Temporal Variability of Frost Blisters in a Perennial Frozen Lake along the Antarctic Coast as Indicator of the Groundwater Supply |
title_sort |
spatio-temporal variability of frost blisters in a perennial frozen lake along the antarctic coast as indicator of the groundwater supply |
publishDate |
2021 |
url |
https://www.openaccessrepository.it/record/157414 https://doi.org/10.3390/rs13030435 |
long_lat |
ENVELOPE(76.108,76.108,-69.415,-69.415) ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Antarctic Frozen Lake Talik The Antarctic Victoria Land |
geographic_facet |
Antarctic Frozen Lake Talik The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/157414 doi:10.3390/rs13030435 |
op_rights |
info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by |
op_doi |
https://doi.org/10.3390/rs13030435 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
3 |
container_start_page |
435 |
_version_ |
1798847476166295552 |