Autonomous temperature probes, data from the EMSO-Azores observatory, 2017-2018

Date 2020-08
Temporal extent 2017-07-13 -2018-08-19
Author(s) Cannat MathildeORCID1, Wheeler BenjaminORCID3, Fontaine Fabrice2, Rouméjon Stéphane3, Sarradin Pierre-MarieORCID4, Legrand JulienORCID4
Affiliation(s) 1 : CNRS, IPGP, France
2 : IPGP, OVPF, FRANCE
3 : IPGP, France
4 : IFREMER Institut Carnot EDROME, France
DOI 10.17882/75412
Publisher SEANOE
Keyword(s) Mid-Atlantic Ridge, EMSO-Azores, Hydrothermal Vents, Lucky Strike, Eiffel Tower, Capelinhos, Cimendef, Crystal, Isabel, Montsegur, Sintra, South Crystal, White Castle, Y3, WHOI, NKE, Temperature, Time-series, MoMAR, MoMARSAT2016
Abstract

This dataset contains temperature data acquired between July 2017 and August 2018 with an array of 27 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 "Sensor Metadata"

Operating parameters : Temperatures are recorded at a frequency of: 1 meas. per 1 to 15 minutes (HTW, HTWN, HTNKE probes and LTW probes); 1s to 1 minute (LTNKE probes); and 2 hours (LTiButton).

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.

All probes are calibrated in time before deployment, probe time adjusted to UTC time. Temperature of probes is checked after recovery and before deployment. Clock drift after recovery is not implemented in data.

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 Metadata"

Data management


  • Real time data transmission: No

  • Data storage in the Communication and storage unit (COSTOF2): No

  • Data storage in the instrument: Full

 

Licence CC-BY
Utilisation EMSO data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of EMSO data. EMSO data are intended to be research-quality and include estimates of data quality and accuracy, but it is possible that these estimates or the data themselves contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data, data quality, and data accuracy accordingly. EMSO welcomes users to ask questions and report problems to the contact addresses listed in the data files or on the EMSO web page.
Data
File Size Format Processing Access
Sensor Metadata 24 KB XLS, XLSX Open access
97 MB Zippées Raw data Access on demand until 2021-12-31
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How to cite 

Cannat Mathilde, Wheeler Benjamin, Fontaine Fabrice, Rouméjon Stéphane, Sarradin Pierre-Marie, Legrand Julien (2020). Autonomous temperature probes, data from the EMSO-Azores observatory, 2017-2018. SEANOE. https://doi.org/10.17882/75412