search DOI 10.17882/79527

Autonomous temperature probes, data from the EMSO-Azores observatory, 2018-2019

This dataset contains temperature data acquired between August 2018 and July 2019 with an array of 35 autonomous temperature probes installed in smoker orifices, cracks or patches of diffuse hydrothermal venting. We used 6 types of probes (HTW, HTWN, HTNKE, LTW, LTNKE and LTiButton). Probes locations, acquisition parameters and clock drift values (UTC-timeprobe) are listed in the metadata file.

Disciplines

Physical oceanography

Keywords

Mid-Atlantic Ridge, EMSO-Azores, Hydrothermal Vents, Lucky Strike, Eiffel Tower, Capelinhos, Cimendef, Crystal, Isabel, Montsegur, Sintra, South Crystal, White Castle, Y3, WHOI, NKE, iButton, 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_2018_2019.xlsx

Installation

Operating parameters

  • Temperatures are recorded at a frequency of: 1 meas. per 1 to 14 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 and a clock drift of about 1min per month.
  • 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 and a clock drift of about 1min/year.
  • High-temperature NKE probes (HTNKE) record temperatures up to 450°C, with an accuracy of ±0.5°C, a resolution of 0.1°C and a clock drift of about 1min/month.
  • Low-temperature WHOI probes (LTW) record temperatures up to 125°C, with an accuracy of ±0.22°C, a resolution of 0.025°C and a clock drift of about 1min per month.
  • Low-temperature NKE probes (LTNKE) record temperatures up to 100°C, with an accuracy of ±0.5°C, a resolution of 0.12°C at 60°C and a clock drift of about 1min/month.
  • Low-temperature iButton probes (LTiButton) record temperatures up to 85°C, with an accuracy of ±0.5°C, a resolution of ±0.5°C and a clock drift of about 1min/month.
  • LTGrad probes: 2 LTiButton probes separated by 5 cm and attached to a 25 cm-long PVC support.
  • LTchB probe: 6 LTiButton probes fixed to an 80 cm-long rope with a float at each end.

Sensor setup - Test and calibration

All probes are calibrated in time before deployment, probe time adjusted to UTC time. Temperature readings of WHOI probes are checked at IPGP after recovery and before deployment using an oven in the laboratory. NKE probes are sent back to factory every 3-4 years for battery change and calibration. Clock drift after recovery is not implemented in data but listed in the metadata file.

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

Data

FileSizeFormatProcessingAccess
metadata
27 KoXLS, XLSXQuality controlled data
Download
Data
14 MoTEXTRaw data
Download
How to cite
Cannat Mathilde, Wheeler Benjamin, Fontaine Fabrice, Chen Jie, Sarradin Pierre-Marie, Legrand Julien (2021). Autonomous temperature probes, data from the EMSO-Azores observatory, 2018-2019. SEANOE. https://doi.org/10.17882/79527

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Oceanographic cruises
MOMARSAT2018,
MOMARSAT2019
Related documents
Wheeler Benjamin, Cannat Mathilde, Chavagnac Valérie, Fontaine Fabrice (2024). Diffuse Venting and Near Seafloor Hydrothermal Circulation at the Lucky Strike Vent Field, Mid-Atlantic Ridge. Geochemistry Geophysics Geosystems - G3. 25 (03). e2023GC011099 (26p.). https://archimer.ifremer.fr/doc/00879/99126/
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