A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals
The effect of thermal mass on the salinity estimate from conductivity-temperature-depth (CTD) tags sensor mounted on marine mammals is documented, and a correction scheme is proposed to mitigate its impact. The algorithm developed here allows for a direct correction of the salinity data, rather than...
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ftarchimer:oai:archimer.ifremer.fr:69697 2023-05-15T18:25:42+02:00 A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals Mensah, Vigan Roquet, Fabien Siegelman-charbit, Lia Picard, Baptiste Pauthenet, Etienne Guinet, Christophe 2018-06 application/pdf https://archimer.ifremer.fr/doc/00585/69697/67577.pdf https://doi.org/10.1175/JTECH-D-17-0141.1 https://archimer.ifremer.fr/doc/00585/69697/ eng eng Amer Meteorological Soc https://archimer.ifremer.fr/doc/00585/69697/67577.pdf doi:10.1175/JTECH-D-17-0141.1 https://archimer.ifremer.fr/doc/00585/69697/ info:eu-repo/semantics/openAccess restricted use Journal Of Atmospheric And Oceanic Technology (0739-0572) (Amer Meteorological Soc), 2018-06 , Vol. 35 , N. 6 , P. 1237-1252 Data processing In situ oceanic observations Instrumentation sensors Profilers oceanic text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1175/JTECH-D-17-0141.1 2021-09-23T20:33:33Z The effect of thermal mass on the salinity estimate from conductivity-temperature-depth (CTD) tags sensor mounted on marine mammals is documented, and a correction scheme is proposed to mitigate its impact. The algorithm developed here allows for a direct correction of the salinity data, rather than a correction of the sample's conductivity and temperature. The amplitude of the thermal mass-induced error on salinity and its correction are evaluated via comparison between data from CTD tags and from Sea-Bird Scientific CTD used as a reference. Thermal mass error on salinity appears to be generally O(10(-2)) g kg(-1), it may reach O(10(-1)) g kg(-1), and it tends to increase together with the magnitude of the cumulated temperature gradient (T-HP) within the water column. The correction we propose yields an error decrease of up to similar to 60% if correction coefficients specific to a certain tag or environment are calculated, and up to 50% if a default value for the coefficients is provided. The correction with the default coefficients was also evaluated using over 22 000 in situ dive data from five tags deployed in the Southern Ocean and is found to yield significant and systematic improvements on the salinity data, including for profiles whose T-HP was weak and the error small. The correction proposed here yields substantial improvements in the density estimates, although a thermal mass-induced error in temperature measurements exists for very large T-HP and has yet to be corrected. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Southern Ocean Journal of Atmospheric and Oceanic Technology 35 6 1237 1252 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Data processing In situ oceanic observations Instrumentation sensors Profilers oceanic |
spellingShingle |
Data processing In situ oceanic observations Instrumentation sensors Profilers oceanic Mensah, Vigan Roquet, Fabien Siegelman-charbit, Lia Picard, Baptiste Pauthenet, Etienne Guinet, Christophe A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals |
topic_facet |
Data processing In situ oceanic observations Instrumentation sensors Profilers oceanic |
description |
The effect of thermal mass on the salinity estimate from conductivity-temperature-depth (CTD) tags sensor mounted on marine mammals is documented, and a correction scheme is proposed to mitigate its impact. The algorithm developed here allows for a direct correction of the salinity data, rather than a correction of the sample's conductivity and temperature. The amplitude of the thermal mass-induced error on salinity and its correction are evaluated via comparison between data from CTD tags and from Sea-Bird Scientific CTD used as a reference. Thermal mass error on salinity appears to be generally O(10(-2)) g kg(-1), it may reach O(10(-1)) g kg(-1), and it tends to increase together with the magnitude of the cumulated temperature gradient (T-HP) within the water column. The correction we propose yields an error decrease of up to similar to 60% if correction coefficients specific to a certain tag or environment are calculated, and up to 50% if a default value for the coefficients is provided. The correction with the default coefficients was also evaluated using over 22 000 in situ dive data from five tags deployed in the Southern Ocean and is found to yield significant and systematic improvements on the salinity data, including for profiles whose T-HP was weak and the error small. The correction proposed here yields substantial improvements in the density estimates, although a thermal mass-induced error in temperature measurements exists for very large T-HP and has yet to be corrected. |
format |
Article in Journal/Newspaper |
author |
Mensah, Vigan Roquet, Fabien Siegelman-charbit, Lia Picard, Baptiste Pauthenet, Etienne Guinet, Christophe |
author_facet |
Mensah, Vigan Roquet, Fabien Siegelman-charbit, Lia Picard, Baptiste Pauthenet, Etienne Guinet, Christophe |
author_sort |
Mensah, Vigan |
title |
A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals |
title_short |
A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals |
title_full |
A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals |
title_fullStr |
A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals |
title_full_unstemmed |
A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals |
title_sort |
correction for the thermal mass-induced errors of ctd tags mounted on marine mammals |
publisher |
Amer Meteorological Soc |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00585/69697/67577.pdf https://doi.org/10.1175/JTECH-D-17-0141.1 https://archimer.ifremer.fr/doc/00585/69697/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Journal Of Atmospheric And Oceanic Technology (0739-0572) (Amer Meteorological Soc), 2018-06 , Vol. 35 , N. 6 , P. 1237-1252 |
op_relation |
https://archimer.ifremer.fr/doc/00585/69697/67577.pdf doi:10.1175/JTECH-D-17-0141.1 https://archimer.ifremer.fr/doc/00585/69697/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1175/JTECH-D-17-0141.1 |
container_title |
Journal of Atmospheric and Oceanic Technology |
container_volume |
35 |
container_issue |
6 |
container_start_page |
1237 |
op_container_end_page |
1252 |
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1766207313412096000 |