DOI: 10.17882/112311
title: Time-series of ocean bottom currents from a seafloor current meter at the Boyd seamount, Arctic Mid-Ocean Ridge (AMOR)

description: This dataset contains ocean bottom current measurements acquired at the summit of the Boyd Seamount on the Mohn’s Ridge between June 2023 and June 2024 (GS23_RCM_508_20230610_1905). The data were collected using Aanderaa seaguard single point current meter deployed at the summit of Boyd Seamount (72.6716 N - lon: 2.7510 E - depth: 642 m).
The SeaGuard Single Point Current Meter (Aanderaa Data Instruments AS, Bergen, Norway) measures current velocity using an acoustic Doppler principle (ZPulse technology). The instrument is typically mounted on a fixed frame or mooring and determines water current speed and direction within a single sampling volume located a short distance from the sensor head. Acoustic pulses are transmitted and the Doppler shift of the backscattered signal is used to calculate orthogonal velocity components, which are then resolved into current speed and direction; additional sensors (e.g., temperature, conductivity, pressure, oxygen) may be integrated depending on configuration.
Internal clocks were set to UTC prior to deployment. Post-recovery clock drift was not applied to the data files but is documented, when available, in the accompanying metadata file.
Further technical information and instrument specifications are available from the manufacturer (Aanderaa Data Instruments AS) and in the SeaGuard Single Point Current Meter user documentation (https://www.aanderaa.com/).
For each deployed instrument, the dataset includes one text file with:
 - Current data
 - Temperature data
 - O2 concentration data
 - Turbidity data
 - Conductivity data
 
## Data organization and naming convention ##
The dataset is organized in a hierarchical structure with one master folder per deployed current meter. Each master folder contains all files associated with a single instrument deployment.
→ Master folder naming convention:
Each master folder follows the naming format: CruiseName_InstrumentType-InstrumentNumber
For example: GS23_RCM_508_20230610_1905
where:
 - GS23 refers to the research cruise (G.O. Sars 2023), combining the vessel name and cruise year.
 - RCM refers to the instrument type and model identifier.
 - 508 refers to the serial number of the specific instrument.
 - 20230610 refers to the instrument launch date.
This naming convention ensures that each deployment is uniquely and clearly identified by cruise and instrument.
→ Folder structure within each master folder:
Each master folder contains the following subfolders and files:
raw This folder contains the original raw data files in their native formats (e.g., .csv, .txt, .xlsx). Files include current velocities and direction and temperature data. pp_mat This folder contains post-processed data in MATLAB (.mat) format. The data have been quality controlled and trimmed to include only the period during which the instrument was deployed at the seafloor. These files therefore represent the final dataset of scientific interest. figures This folder contains a set of standardized figures generated from the processed data. These figures display the time series and related diagnostics in multiple formats to facilitate quick inspection, quality assessment, and interpretation.