Surface Images (port side) from expedition Canada-Sweden Arctic Ocean, 2025
Ian Brooks
Digital photographic images of the surface to the port side of Oden. Images were recorded every 15 seconds.
MarineObservationsSea iceImageryPhotograph
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Version
Citation
References
Srivastava, P., I. M. Brooks, J. Prytherch, D. J. Salisbury, A. D. Elvidge, I. A. Renfrew, M. J. Yelland, 2022: Ship-based estimates of momentum exchange coefficient over sea ice and recommendation for its parameterization. Atmos. Chem. Phys. 22, 4763–4778, https://doi.org/10.5194/acp-22-4763-2022.
Data description
Images are taken by a Mobotix MX-M24M IP camera with a wide angle lens providing a 90-degree field of view. The camera is installed on the railings above the bridge, approximately 25 above the surface, and is angled down, capturing a region out from approximately 15-20m from the ship to the horizon. Images are captured every 15 seconds and stored as JPG image files with dimensions of 2048x1536 pixels.
The files are named for the time of image capture DDD-hh-mm-ss.jpg where DDD is day of year (Jan 1 = 1), hh is hour, mm is minutes, and ss is seconds. The camera time is synchronized to the ship's time server. The files are provided as a single ZIP archive containing a directory structure mx1/YYYY-MM-DD with the images for each day. The zip file is approximately 103GB and the unpacked files are approximately 184GB.
Imagery from the starboard side and forward over the bow are provided as separate data sets.
GPS locations and imagery from the starboard side and forward over the bow are provided as separate data sets.
Comments
The imagery provides a quick-look of surface conditions around the ship, and also a means for deriving surface properties. Notably similar data has been used to calculate ice/melt pond/open water fractions around the ship on previous expeditions. See Srivastava et al. (2022) for details of the processing applied to calculate these quantities. The angle subtended by each pixel is approximately 0.0465 degrees (lab calibration).
Project
Canada-Sweden Arctic Ocean 2025 (AO2025)
Publisher
Bolin Centre Database
License
Open Data Commons Attribution License (ODC-By) v1.0
First name
Ian
Last name or organisation
Brooks
Email address
Address
School of Earth and Environment University of Leeds
Postal code
LS2 9JT
City
Leeds
Province or state
Leeds
Country
United Kingdom
GCMD science keyword
Earth science > Oceans > Sea ice
GCMD location
Ocean > Arctic Ocean
Dataset language
English
Begin date
2025-08-11
End date
2025-09-15