RT journal article
T1 Determination of an experimental geoid at Deception Island, South Shetland Islands, Antarctica
A1 Jigena Antelo, Bismarck
A1 Berrocoso Domínguez, Manuel
A2 Ciencias y Técnicas de la Navegación y Construcciones Navales
A2 Matemáticas
K1 geoid undulation
K1 gravimetric
K1 levelling
K1 Livingston Island
K1 mean sea level
K1 orthometric height
AB Deception Island is an active volcano located in Bransfield Strait. Its volcanic activity is linkedto the presence of gravity anomalies that influence the definition of the geoid. In this paper, a preciseundulation geoid model (GeoiDEC14) has been computed from GPS, gravimetric and levellingmeasurements. GeoiDEC14 highlights local anomalies of the island that match with hot spots, such asthe minimum values shown in Fumarole Bay and Whalers Bay (fumarole areas), or the maximum valuesfound in the remains of lava at Colatinas, Black Glacier and Murature Point. Comparison ofGeoiDEC14 with global models always shows negative values due to an average of 18.80 m for ourmodel compared to 19.80–20.60 m for models such as ITSG-Grace2014s, EGM08, AIUG-Grace03s orEGM96. This difference is due to the lack of resolution of global models and to the volcanic activity onthe island. To confirm the results, the same measurements were taken on nearby Livingston Island. Thevalues 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.
PB Cambridge University Press
SN 0954-1020
YR 2016
FD 2016-02-25
LK http://hdl.handle.net/10498/38304
UL http://hdl.handle.net/10498/38304
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026