Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle
During March 2003, Autosub, an autonomous underwater vehicle (AUV) operated by the UK National Oceanography Centre, Southampton, was deployed under sea ice north of Thurston Island, Amundsen Sea, Antarctica (at ∼71° S, 100° W). The vehicle was fitted with an upward-looking 300 kHz acoustic Doppler c...
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ftnerc:oai:nora.nerc.ac.uk:308159 2023-05-15T13:24:02+02:00 Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle Banks, Christopher J. Brandon, Mark A. Garthwaite, Paul H. 2006 http://nora.nerc.ac.uk/id/eprint/308159/ unknown Banks, Christopher J. orcid:0000-0003-4457-0876 Brandon, Mark A.; Garthwaite, Paul H. 2006 Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle. Annals of Glaciology, 44 (1). 211-216. https://doi.org/10.3189/172756406781811871 <https://doi.org/10.3189/172756406781811871> Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.3189/172756406781811871 2023-02-04T19:35:57Z During March 2003, Autosub, an autonomous underwater vehicle (AUV) operated by the UK National Oceanography Centre, Southampton, was deployed under sea ice north of Thurston Island, Amundsen Sea, Antarctica (at ∼71° S, 100° W). The vehicle was fitted with an upward-looking 300 kHz acoustic Doppler current profiler (ADCP) to provide current velocity above the AUV. The ADCP also recorded ranges to the ocean-ice interface. Such data can be used to derive sea-ice draft by using a number of novel processing steps such as correcting for the coordinate systems of the ADCP unit and the vehicle as well as corrections for changes in sound speed. This paper outlines the processing stages required to obtain a probability density function (PDF) of sea-ice draft and presents PDFs for the region north of Thurston Island. The distribution of ice draft was found to be unimodal, with modes between 2.2 and 2.4 m. Given the uncertainty in sound speed, the limit of accuracy was estimated as ∼6 cm. Article in Journal/Newspaper Amundsen Sea Annals of Glaciology Antarc* Antarctica Sea ice Thurston Island Natural Environment Research Council: NERC Open Research Archive Amundsen Sea Thurston ENVELOPE(-97.500,-97.500,-71.833,-71.833) Thurston Island ENVELOPE(-99.000,-99.000,-72.167,-72.167) Annals of Glaciology 44 211 216 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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description |
During March 2003, Autosub, an autonomous underwater vehicle (AUV) operated by the UK National Oceanography Centre, Southampton, was deployed under sea ice north of Thurston Island, Amundsen Sea, Antarctica (at ∼71° S, 100° W). The vehicle was fitted with an upward-looking 300 kHz acoustic Doppler current profiler (ADCP) to provide current velocity above the AUV. The ADCP also recorded ranges to the ocean-ice interface. Such data can be used to derive sea-ice draft by using a number of novel processing steps such as correcting for the coordinate systems of the ADCP unit and the vehicle as well as corrections for changes in sound speed. This paper outlines the processing stages required to obtain a probability density function (PDF) of sea-ice draft and presents PDFs for the region north of Thurston Island. The distribution of ice draft was found to be unimodal, with modes between 2.2 and 2.4 m. Given the uncertainty in sound speed, the limit of accuracy was estimated as ∼6 cm. |
format |
Article in Journal/Newspaper |
author |
Banks, Christopher J. Brandon, Mark A. Garthwaite, Paul H. |
spellingShingle |
Banks, Christopher J. Brandon, Mark A. Garthwaite, Paul H. Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle |
author_facet |
Banks, Christopher J. Brandon, Mark A. Garthwaite, Paul H. |
author_sort |
Banks, Christopher J. |
title |
Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle |
title_short |
Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle |
title_full |
Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle |
title_fullStr |
Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle |
title_full_unstemmed |
Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle |
title_sort |
measurement of sea-ice draft using upward-looking adcp on an autonomous underwater vehicle |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/308159/ |
long_lat |
ENVELOPE(-97.500,-97.500,-71.833,-71.833) ENVELOPE(-99.000,-99.000,-72.167,-72.167) |
geographic |
Amundsen Sea Thurston Thurston Island |
geographic_facet |
Amundsen Sea Thurston Thurston Island |
genre |
Amundsen Sea Annals of Glaciology Antarc* Antarctica Sea ice Thurston Island |
genre_facet |
Amundsen Sea Annals of Glaciology Antarc* Antarctica Sea ice Thurston Island |
op_relation |
Banks, Christopher J. orcid:0000-0003-4457-0876 Brandon, Mark A.; Garthwaite, Paul H. 2006 Measurement of sea-ice draft using upward-looking ADCP on an autonomous underwater vehicle. Annals of Glaciology, 44 (1). 211-216. https://doi.org/10.3189/172756406781811871 <https://doi.org/10.3189/172756406781811871> |
op_doi |
https://doi.org/10.3189/172756406781811871 |
container_title |
Annals of Glaciology |
container_volume |
44 |
container_start_page |
211 |
op_container_end_page |
216 |
_version_ |
1766377048125734912 |