An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community
The commercially available Sea-Bird SeaFET™ provides an accessible way for a broad community of researchers to study ocean acidification and obtain robust measurements of seawater pH via the use of an in situ autonomous sensor. There are pitfalls, however, that have been detailed in previous best pr...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:557ee051c3e74f67b58eccc16e3fecf3 2023-05-15T17:52:00+02:00 An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community C. A. Miller K. Pocock W. Evans A. L. Kelley 2018-08-01 https://doi.org/10.5194/os-14-751-2018 https://www.ocean-sci.net/14/751/2018/os-14-751-2018.pdf https://doaj.org/article/557ee051c3e74f67b58eccc16e3fecf3 en eng Copernicus Publications doi:10.5194/os-14-751-2018 1812-0784 1812-0792 https://www.ocean-sci.net/14/751/2018/os-14-751-2018.pdf https://doaj.org/article/557ee051c3e74f67b58eccc16e3fecf3 undefined Ocean Science, Vol 14, Pp 751-768 (2018) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/os-14-751-2018 2023-01-22T19:11:33Z The commercially available Sea-Bird SeaFET™ provides an accessible way for a broad community of researchers to study ocean acidification and obtain robust measurements of seawater pH via the use of an in situ autonomous sensor. There are pitfalls, however, that have been detailed in previous best practices for sensor care, deployment, and data handling. Here, we took advantage of two distinctly different coastal settings to evaluate the Sea-Bird SeaFET™ and examine the multitude of scenarios in which problems may arise confounding the accuracy of measured pH. High-resolution temporal measurements of pH were obtained during 3- to 5-month field deployments in three separate locations (two in south-central Alaska, USA, and one in British Columbia, Canada) spanning a broad range of nearshore temperature and salinity conditions. Both the internal and external electrodes onboard the SeaFET™ were evaluated against robust benchtop measurements for accuracy using the factory calibration, an in situ single-point calibration, or an in situ multi-point calibration. In addition, two sensors deployed in parallel in Kasitsna Bay, Alaska, USA, were compared for inter-sensor variability in order to quantify other factors contributing to the sensor's intrinsic inaccuracies. Based on our results, the multi-point calibration method provided the highest accuracy (< 0.025 difference in pH) of pH when compared against benchtop measurements. Spectral analysis of time series data showed that during spring in Alaskan waters, a range of tidal frequencies dominated pH variability, while seasonal oceanographic conditions were the dominant driver in Canadian waters. Further, it is suggested that spectral analysis performed on initial deployments may be able to act as an a posteriori method to better identify appropriate calibration regimes. Based on this evaluation, we provide a comprehensive assessment of the potential sources of uncertainty associated with accuracy and precision of the SeaFET™ electrodes. Article in Journal/Newspaper Ocean acidification Alaska Unknown British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Ocean Science 14 4 751 768 |
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language |
English |
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envir geo |
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envir geo C. A. Miller K. Pocock W. Evans A. L. Kelley An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community |
topic_facet |
envir geo |
description |
The commercially available Sea-Bird SeaFET™ provides an accessible way for a broad community of researchers to study ocean acidification and obtain robust measurements of seawater pH via the use of an in situ autonomous sensor. There are pitfalls, however, that have been detailed in previous best practices for sensor care, deployment, and data handling. Here, we took advantage of two distinctly different coastal settings to evaluate the Sea-Bird SeaFET™ and examine the multitude of scenarios in which problems may arise confounding the accuracy of measured pH. High-resolution temporal measurements of pH were obtained during 3- to 5-month field deployments in three separate locations (two in south-central Alaska, USA, and one in British Columbia, Canada) spanning a broad range of nearshore temperature and salinity conditions. Both the internal and external electrodes onboard the SeaFET™ were evaluated against robust benchtop measurements for accuracy using the factory calibration, an in situ single-point calibration, or an in situ multi-point calibration. In addition, two sensors deployed in parallel in Kasitsna Bay, Alaska, USA, were compared for inter-sensor variability in order to quantify other factors contributing to the sensor's intrinsic inaccuracies. Based on our results, the multi-point calibration method provided the highest accuracy (< 0.025 difference in pH) of pH when compared against benchtop measurements. Spectral analysis of time series data showed that during spring in Alaskan waters, a range of tidal frequencies dominated pH variability, while seasonal oceanographic conditions were the dominant driver in Canadian waters. Further, it is suggested that spectral analysis performed on initial deployments may be able to act as an a posteriori method to better identify appropriate calibration regimes. Based on this evaluation, we provide a comprehensive assessment of the potential sources of uncertainty associated with accuracy and precision of the SeaFET™ electrodes. |
format |
Article in Journal/Newspaper |
author |
C. A. Miller K. Pocock W. Evans A. L. Kelley |
author_facet |
C. A. Miller K. Pocock W. Evans A. L. Kelley |
author_sort |
C. A. Miller |
title |
An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community |
title_short |
An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community |
title_full |
An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community |
title_fullStr |
An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community |
title_full_unstemmed |
An evaluation of the performance of Sea-Bird Scientific's SeaFET™ autonomous pH sensor: considerations for the broader oceanographic community |
title_sort |
evaluation of the performance of sea-bird scientific's seafet™ autonomous ph sensor: considerations for the broader oceanographic community |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/os-14-751-2018 https://www.ocean-sci.net/14/751/2018/os-14-751-2018.pdf https://doaj.org/article/557ee051c3e74f67b58eccc16e3fecf3 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) |
geographic |
British Columbia Canada |
geographic_facet |
British Columbia Canada |
genre |
Ocean acidification Alaska |
genre_facet |
Ocean acidification Alaska |
op_source |
Ocean Science, Vol 14, Pp 751-768 (2018) |
op_relation |
doi:10.5194/os-14-751-2018 1812-0784 1812-0792 https://www.ocean-sci.net/14/751/2018/os-14-751-2018.pdf https://doaj.org/article/557ee051c3e74f67b58eccc16e3fecf3 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/os-14-751-2018 |
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Ocean Science |
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14 |
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4 |
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751 |
op_container_end_page |
768 |
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