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Autonomous temperature probes data from the EMSO-Azores observatory, 2020-2021
This dataset contains temperature data acquired between September 2020 and june 2021 with an array of 33 autonomous temperature probes installed in smoker orifices, cracks or patches of diffuse hydrothermal venting. We used 6 types of probes (HTW, HTWN, HTNKE, LTNKE, LTW and LTGrad). Probes locations, acquisition parameters and clock drift values (UTC-timeprobe) are listed in the metadata file.
Disciplines
Physical oceanography
Keywords
Ridge, EMSO-Azores, Hydrothermal Vents, Lucky Strike, Eiffel Tower, Capelinhos, Cimendef, Cypres, Montsegur Mid-Atlantic, Sintra, South Crystal, White Castle, Y3, WHOI, NKE, iButton, LTGrad, Temperature, Time-series, MoMAR
Location
37.30134N, 37.2888S, -32.275618E, -32.27982W
Devices
Parameter
- vent fluid temperature (°C)
Location
- Regional node: Emso-Azores
- Site: Lucky Strike hydrothermal field
- coordinates: see EMSOAzores_auton_T_probes_2020_2021.docx
Installation
- Cruise: SARRADIN Pierre-Marie, LEGRAND Julien, MOMARSAT2020 cruise, Pourquoi Pas ?,https://doi.org/10.17600/18000684
Recovery
- Cruise: MATABOS, Marjolaine and SARRAZIN Jozée, MOMARSAT2021 cruise, Atalante, https://doi.org/10.17600/18001296
Operating parameters
- Temperatures are recorded at frequencies between 1/90 s and 1/60 minutes.
Sensor metadata
High-temperature WHOI probes (HTW) contain of 2 J-type thermistors in their rod tip connected to 2 temperature data-loggers (named A & B), 2 data recordings are thus available for each probe. HTW probes record temperatures up to 415°C with an accuracy of ± 1.1°C, a resolution of 0.25°C at 375°C.
New high-temperature WHOI probes (HTWN) contain 1 temperature data-logger and 1 attitude logger to measure absolute orientation (tilt) and acceleration. The thermocouple in their rod tip can be J or T-Type. We mostly use J-Type thermocouples. These record temperatures up to 450°C, with an accuracy of ± 0.6°C, a resolution of 0,03°C.
High-temperature NKE probes (HTNKE) record temperatures up to 450°C, with an accuracy of ±0.5°C, and a resolution of 0.1°C.
Low-temperature WHOI probes (LTW) record temperatures up to 125°C, with an accuracy of ±0.22°C, and a resolution of 0.025°C.
Low-temperature NKE probes (LTNKE) record temperatures up to 100°C, with an accuracy of ±0.5°C, and a resolution of 0.12°C at 60°C.
LTGrad probes comprise 2 LTiButton probes separated by 7 cm and attached to a 25 to 30 cm-long PVC support. Low-temperature iButton probes (LTiButton) record temperatures up to 85°C, with an accuracy of ±0.5°C, and a resolution of ±0.5°C.
Sensor setup - Test and calibration
All probes are synchronized to UTC time before deployment. Temperature readings of WHOI probes are checked with an oven at IPGP whenever the probe is not redeployed... which is not frequent because we do not have many spares. NKE probes are sent back to maker every 3-4 years for battery change and calibration. Clock drift after recovery is listed in the metadata file: EMSOAzores_auton_T_probes_2020_2021.docx
Sensor setup - Data management
- Real time data transmission : No
- Data storage in the Communication and storage unit (COSTOF2): No
- Data storage in the instrument: Full