Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments.
The development of a broad-scale array of about 3000 autonomous profiling floats, known as Argo, has been underway since 2000. This array will deliver up to 100,000 vertical profiles of temperature, salinity and other parameters from the surface to depths up to 2000 m. While floats are expected to g...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/objective-analyses-of-hydrographic-data-for-referencing-profiling-float-salinities-in-highly-variable-environments(a455c0a5-a462-4a70-8349-b4a37bcdc2f3).html https://doi.org/10.1016/j.dsr2.2004.12.014 http://www.scopus.com/inward/record.url?scp=16244382936&partnerID=8YFLogxK |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/a455c0a5-a462-4a70-8349-b4a37bcdc2f3 2023-05-15T17:29:12+02:00 Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. Boehme, Lars Send, U. 2005 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/objective-analyses-of-hydrographic-data-for-referencing-profiling-float-salinities-in-highly-variable-environments(a455c0a5-a462-4a70-8349-b4a37bcdc2f3).html https://doi.org/10.1016/j.dsr2.2004.12.014 http://www.scopus.com/inward/record.url?scp=16244382936&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Boehme , L & Send , U 2005 , ' Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. ' , Deep Sea Research Part II: Topical Studies in Oceanography , vol. 52 , no. 3-4 , pp. 651-664 . https://doi.org/10.1016/j.dsr2.2004.12.014 NORTH-ATLANTIC FIELDS ARGO FLOAT PROFILING QUALITY CONTROL SALINITY article 2005 ftunstandrewcris https://doi.org/10.1016/j.dsr2.2004.12.014 2021-12-26T14:15:02Z The development of a broad-scale array of about 3000 autonomous profiling floats, known as Argo, has been underway since 2000. This array will deliver up to 100,000 vertical profiles of temperature, salinity and other parameters from the surface to depths up to 2000 m. While floats are expected to give good measurements of temperature and pressure, salinity measurements sometimes show significant sensor drift with time or offsets. Unless a float is recovered before the battery fails, recalibrations cannot be performed and a remote calibration method is required. Such a quality control system has been set up for the North Atlantic to identify and correct salinity sensor drifts by using historical hydrographic data. An objective mapping method is used that takes the spatial and temporal variations in water mass properties into account. These scales aim to represent the hydrographic structure of the North Atlantic, which follow the large-scale contours of the potential vorticity. The float measurements of each profile are compared to the mapped salinities in potential conductivity space by weighted least-squares, giving one correction for each profile. It is assumed that any conductivity offset changes slowly over time, so that a linear fit of the profile based corrections over the float time series is done. The result is a set of calibrated salinity data with corresponding uncertainties. © 2005 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper North Atlantic University of St Andrews: Research Portal Deep Sea Research Part II: Topical Studies in Oceanography 52 3-4 651 664 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
NORTH-ATLANTIC FIELDS ARGO FLOAT PROFILING QUALITY CONTROL SALINITY |
spellingShingle |
NORTH-ATLANTIC FIELDS ARGO FLOAT PROFILING QUALITY CONTROL SALINITY Boehme, Lars Send, U. Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. |
topic_facet |
NORTH-ATLANTIC FIELDS ARGO FLOAT PROFILING QUALITY CONTROL SALINITY |
description |
The development of a broad-scale array of about 3000 autonomous profiling floats, known as Argo, has been underway since 2000. This array will deliver up to 100,000 vertical profiles of temperature, salinity and other parameters from the surface to depths up to 2000 m. While floats are expected to give good measurements of temperature and pressure, salinity measurements sometimes show significant sensor drift with time or offsets. Unless a float is recovered before the battery fails, recalibrations cannot be performed and a remote calibration method is required. Such a quality control system has been set up for the North Atlantic to identify and correct salinity sensor drifts by using historical hydrographic data. An objective mapping method is used that takes the spatial and temporal variations in water mass properties into account. These scales aim to represent the hydrographic structure of the North Atlantic, which follow the large-scale contours of the potential vorticity. The float measurements of each profile are compared to the mapped salinities in potential conductivity space by weighted least-squares, giving one correction for each profile. It is assumed that any conductivity offset changes slowly over time, so that a linear fit of the profile based corrections over the float time series is done. The result is a set of calibrated salinity data with corresponding uncertainties. © 2005 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Boehme, Lars Send, U. |
author_facet |
Boehme, Lars Send, U. |
author_sort |
Boehme, Lars |
title |
Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. |
title_short |
Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. |
title_full |
Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. |
title_fullStr |
Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. |
title_full_unstemmed |
Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. |
title_sort |
objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. |
publishDate |
2005 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/objective-analyses-of-hydrographic-data-for-referencing-profiling-float-salinities-in-highly-variable-environments(a455c0a5-a462-4a70-8349-b4a37bcdc2f3).html https://doi.org/10.1016/j.dsr2.2004.12.014 http://www.scopus.com/inward/record.url?scp=16244382936&partnerID=8YFLogxK |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Boehme , L & Send , U 2005 , ' Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments. ' , Deep Sea Research Part II: Topical Studies in Oceanography , vol. 52 , no. 3-4 , pp. 651-664 . https://doi.org/10.1016/j.dsr2.2004.12.014 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2004.12.014 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
52 |
container_issue |
3-4 |
container_start_page |
651 |
op_container_end_page |
664 |
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