Autonomous temperature probes data from the EMSO-Azores observatory, 2020-2021
|Temporal extent||2020-09-13 -2021-06-06|
|Author(s)||Cannat Mathilde1, Wheeler Benjamin2, Mahato Souradeep2, Sarradin Pierre-Marie3, Matabos Marjolaine3, Sarrazin Jozee3|
|Affiliation(s)||1 : CNRS, IPGP, France
2 : IPGP, France
3 : IFREMER Institut Carnot EDROME, France
|Keyword(s)||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|
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.
|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.|
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