search DOI 10.17882/80940

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

Parameters

Temperature of the water column

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

Recovery

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

Data

FileSizeFormatProcessingAccess
Metadata
210 KoPDF
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Data files
9 MoTEXTRaw data
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How to cite
Cannat Mathilde, Wheeler Benjamin, Mahato Souradeep, Sarradin Pierre-Marie, Matabos Marjolaine, Sarrazin Jozee (2021). Autonomous temperature probes data from the EMSO-Azores observatory, 2020-2021. SEANOE. https://doi.org/10.17882/80940

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Oceanographic cruises
MOMARSAT2020
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