Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica
Abstract Deception Island is an active volcano located in Bransfield Strait. Its volcanic activity is linked to the presence of gravity anomalies that influence the definition of the geoid. In this paper, a precise undulation geoid model (GeoiDEC14) has been computed from GPS, gravimetric and levell...
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crcambridgeupr:10.1017/s0954102015000681 2024-09-15T17:48:40+00:00 Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica Jigena, Bismarck Berrocoso, Manuel Torrecillas, Cristina Vidal, Juan Barbero, Ignacio Fernandez-Ros, Alberto 2016 http://dx.doi.org/10.1017/s0954102015000681 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102015000681 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 28, issue 4, page 277-292 ISSN 0954-1020 1365-2079 journal-article 2016 crcambridgeupr https://doi.org/10.1017/s0954102015000681 2024-07-31T04:04:20Z Abstract Deception Island is an active volcano located in Bransfield Strait. Its volcanic activity is linked to the presence of gravity anomalies that influence the definition of the geoid. In this paper, a precise undulation geoid model (GeoiDEC14) has been computed from GPS, gravimetric and levelling measurements. GeoiDEC14 highlights local anomalies of the island that match with hot spots, such as the minimum values shown in Fumarole Bay and Whalers Bay (fumarole areas), or the maximum values found in the remains of lava at Colatinas, Black Glacier and Murature Point. Comparison of GeoiDEC14 with global models always shows negative values due to an average of 18.80 m for our model compared to 19.80–20.60 m for models such as ITSG-Grace2014s, EGM08, AIUG-Grace03s or EGM96. This difference is due to the lack of resolution of global models and to the volcanic activity on the island. To confirm the results, the same measurements were taken on nearby Livingston Island. The values of geoid undulation on this island reaffirm the lack of detail in the global geoid in the area, presenting an average of 18.90 m, similar to the average value of GeoiDEC14. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Bransfield Strait Deception Island Livingston Island South Shetland Islands Cambridge University Press Antarctic Science 28 4 277 292 |
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Cambridge University Press |
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English |
description |
Abstract Deception Island is an active volcano located in Bransfield Strait. Its volcanic activity is linked to the presence of gravity anomalies that influence the definition of the geoid. In this paper, a precise undulation geoid model (GeoiDEC14) has been computed from GPS, gravimetric and levelling measurements. GeoiDEC14 highlights local anomalies of the island that match with hot spots, such as the minimum values shown in Fumarole Bay and Whalers Bay (fumarole areas), or the maximum values found in the remains of lava at Colatinas, Black Glacier and Murature Point. Comparison of GeoiDEC14 with global models always shows negative values due to an average of 18.80 m for our model compared to 19.80–20.60 m for models such as ITSG-Grace2014s, EGM08, AIUG-Grace03s or EGM96. This difference is due to the lack of resolution of global models and to the volcanic activity on the island. To confirm the results, the same measurements were taken on nearby Livingston Island. The values of geoid undulation on this island reaffirm the lack of detail in the global geoid in the area, presenting an average of 18.90 m, similar to the average value of GeoiDEC14. |
format |
Article in Journal/Newspaper |
author |
Jigena, Bismarck Berrocoso, Manuel Torrecillas, Cristina Vidal, Juan Barbero, Ignacio Fernandez-Ros, Alberto |
spellingShingle |
Jigena, Bismarck Berrocoso, Manuel Torrecillas, Cristina Vidal, Juan Barbero, Ignacio Fernandez-Ros, Alberto Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica |
author_facet |
Jigena, Bismarck Berrocoso, Manuel Torrecillas, Cristina Vidal, Juan Barbero, Ignacio Fernandez-Ros, Alberto |
author_sort |
Jigena, Bismarck |
title |
Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica |
title_short |
Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica |
title_full |
Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica |
title_fullStr |
Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica |
title_full_unstemmed |
Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica |
title_sort |
determination of an experimental geoid at deception island, south shetland islands, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1017/s0954102015000681 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102015000681 |
genre |
Antarc* Antarctic Science Antarctica Bransfield Strait Deception Island Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Science Antarctica Bransfield Strait Deception Island Livingston Island South Shetland Islands |
op_source |
Antarctic Science volume 28, issue 4, page 277-292 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102015000681 |
container_title |
Antarctic Science |
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28 |
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4 |
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277 |
op_container_end_page |
292 |
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1810290159032205312 |