A validation and comparison study of new, compact, versatile optodes for oxygen, pH and carbon dioxide in marine environments

Eva Fritzsche, Christoph Staudinger, Jan P. Fischer, Roland Thar, Hans W. Jannasch, Joshua N. Plant, Marguerite Blum, Gene Massion, Hans Thomas, Jon Hoech, Kenneth S. Johnson, Sergey M. Borisov, Ingo Klimant

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Continuous monitoring of dissolved oxygen, pH and carbon dioxide are of great importance in oceanography. Sensors are the optimal tools for in situ measurements from mobile platforms, like Autonomous Underwater Vehicles (AUVs) or Argo profiling floats, and for shipboard deployments. A validation study of small, versatile, easy-to-use, stand-alone optodes is presented. Each analyte can be read out with the identical optoelectronics which greatly minimizes the costs of the hardware needed. Several deployments were performed to evaluate the applicability of the sensors. The deployments varied in terms of duration (profiling, long-term monitoring 5 days to 8 weeks) and environmental conditions (salinity: 6–33 PSS; temperature: 9–25 °C). A set of sensors was successfully deployed at a mooring buoy, in an aquaculture facility and in the Monterey Bay Aquarium Open Sea Exhibition. They were also integrated in an AUV and a profiling float. The performance of the optodes was evaluated in comparison with commercially available sensors for dissolved oxygen (Aanderaa Data Instruments AS, Sea-Bird Scientific, OxyGuard®), pH (Hach, Satlantic) and carbon dioxide (Turner design). The data collected by our optodes and the commercially available sensors is generally in good agreement showing that the new, compact sensor device in combination with sensor foils (pO2, pH, pCO2) can be a valuable tool for many applications in oceanography. The data also revealed the importance of the calibration strategy since inappropriate calibration resulted in an offset in the measured parameter. The efficiency of simple biofouling protection strategy (copper guard) for prolong measurements in highly dynamic environments was also demonstrated.

Originalspracheenglisch
Seiten (von - bis)63-76
Seitenumfang14
FachzeitschriftMarine Chemistry
Jahrgang207
DOIs
PublikationsstatusVeröffentlicht - 20 Nov 2018

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Carbon Dioxide
marine environment
carbon dioxide
Oxygen
sensor
oxygen
Sensors
Oceanography
Autonomous underwater vehicles
autonomous underwater vehicle
Dissolved oxygen
oceanography
dissolved oxygen
Calibration
calibration
Biofouling
Aquaculture
Argo
biofouling
Monitoring

Schlagwörter

    ASJC Scopus subject areas

    • !!Oceanography
    • !!Chemistry(all)
    • Umweltchemie
    • !!Water Science and Technology

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    A validation and comparison study of new, compact, versatile optodes for oxygen, pH and carbon dioxide in marine environments. / Fritzsche, Eva; Staudinger, Christoph; Fischer, Jan P.; Thar, Roland; Jannasch, Hans W.; Plant, Joshua N.; Blum, Marguerite; Massion, Gene; Thomas, Hans; Hoech, Jon; Johnson, Kenneth S.; Borisov, Sergey M.; Klimant, Ingo.

    in: Marine Chemistry, Jahrgang 207, 20.11.2018, S. 63-76.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

    Fritzsche, E, Staudinger, C, Fischer, JP, Thar, R, Jannasch, HW, Plant, JN, Blum, M, Massion, G, Thomas, H, Hoech, J, Johnson, KS, Borisov, SM & Klimant, I 2018, 'A validation and comparison study of new, compact, versatile optodes for oxygen, pH and carbon dioxide in marine environments' Marine Chemistry, Jg. 207, S. 63-76. https://doi.org/10.1016/j.marchem.2018.10.009
    Fritzsche, Eva ; Staudinger, Christoph ; Fischer, Jan P. ; Thar, Roland ; Jannasch, Hans W. ; Plant, Joshua N. ; Blum, Marguerite ; Massion, Gene ; Thomas, Hans ; Hoech, Jon ; Johnson, Kenneth S. ; Borisov, Sergey M. ; Klimant, Ingo. / A validation and comparison study of new, compact, versatile optodes for oxygen, pH and carbon dioxide in marine environments. in: Marine Chemistry. 2018 ; Jahrgang 207. S. 63-76.
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    abstract = "Continuous monitoring of dissolved oxygen, pH and carbon dioxide are of great importance in oceanography. Sensors are the optimal tools for in situ measurements from mobile platforms, like Autonomous Underwater Vehicles (AUVs) or Argo profiling floats, and for shipboard deployments. A validation study of small, versatile, easy-to-use, stand-alone optodes is presented. Each analyte can be read out with the identical optoelectronics which greatly minimizes the costs of the hardware needed. Several deployments were performed to evaluate the applicability of the sensors. The deployments varied in terms of duration (profiling, long-term monitoring 5 days to 8 weeks) and environmental conditions (salinity: 6–33 PSS; temperature: 9–25 °C). A set of sensors was successfully deployed at a mooring buoy, in an aquaculture facility and in the Monterey Bay Aquarium Open Sea Exhibition. They were also integrated in an AUV and a profiling float. The performance of the optodes was evaluated in comparison with commercially available sensors for dissolved oxygen (Aanderaa Data Instruments AS, Sea-Bird Scientific, OxyGuard{\circledR}), pH (Hach, Satlantic) and carbon dioxide (Turner design). The data collected by our optodes and the commercially available sensors is generally in good agreement showing that the new, compact sensor device in combination with sensor foils (pO2, pH, pCO2) can be a valuable tool for many applications in oceanography. The data also revealed the importance of the calibration strategy since inappropriate calibration resulted in an offset in the measured parameter. The efficiency of simple biofouling protection strategy (copper guard) for prolong measurements in highly dynamic environments was also demonstrated.",
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    AU - Jannasch, Hans W.

    AU - Plant, Joshua N.

    AU - Blum, Marguerite

    AU - Massion, Gene

    AU - Thomas, Hans

    AU - Hoech, Jon

    AU - Johnson, Kenneth S.

    AU - Borisov, Sergey M.

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