Glider measurements of seawater pH and oxygen in central North Sea during August 2019.
Accurate, low-power sensors are needed to characterise biogeochemical variability on underwater glider missions. However, the needs for high accuracy and low power consumption can be difficult to achieve together. To overcome this difficulty, we integrated a novel sensor combination into a Seaglider...
| Main Authors: | , |
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| Format: | Dataset |
| Language: | English |
| Published: |
NERC EDS British Oceanographic Data Centre NOC
2021
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| Online Access: | https://dx.doi.org/10.5285/c80806e5-7334-6915-e053-6c86abc09409 https://www.bodc.ac.uk/data/published_data_library/catalogue/10.5285/c80806e5-7334-6915-e053-6c86abc09409/ |
| Summary: | Accurate, low-power sensors are needed to characterise biogeochemical variability on underwater glider missions. However, the needs for high accuracy and low power consumption can be difficult to achieve together. To overcome this difficulty, we integrated a novel sensor combination into a Seaglider, comprising a spectrophotometric lab-on-a-chip (LoC) pH sensor and a potentiometric pH sensor, in addition to the standard oxygen (O 2 ) optode. The stable, but less frequent (every 10 min) LoC data were used to calibrate the high-resolution (1 s) potentiometric sensor measurements. The glider was deployed for a 10-day pilot mission in August 2019. This represented the first such deployment of either type of pH sensor on a glider. The deployment was performed with the University of East Anglia (UEA) Seaglider 510 "Orca" (iRobot/Kongsberg) which was deployed in the North Sea on 19 August 2019 at 56.77 degrees N 0.28 degrees E and was recovered on 29 August 2019 at 57.06 degrees N 0.23 degrees W, during survey CEND 12/19 of RV Cefas Endeavour (Lowestoft-Lowestoft, 7 August to 5 September 2019), part of the English International Bottom Trawl Surveys (IBTS) Q3 survey. The glider covered the 45 km transect once with a total of 341 dives. |
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