On-glacier time lapse imagery of melt ponds
The dataset archived here consists of time lapse images taken by two cameras installed on the Sorsdal Glacier between November 2016 and February 2018, overlooking two seasonal surface lakes. The first camera ("camera 1") was installed at approximately S68.67729 E78.35642 and an elevation o...
| Other Authors: | , |
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| Format: | Dataset |
| Language: | unknown |
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Australian Antarctic Data Centre
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| Online Access: | https://researchdata.ands.org.au/on-glacier-time-melt-ponds/1447502 https://doi.org/10.26179/5e5dc1a00b73d https://data.aad.gov.au/metadata/records/AAS_4342_timelapse http://nla.gov.au/nla.party-617536 |
| Summary: | The dataset archived here consists of time lapse images taken by two cameras installed on the Sorsdal Glacier between November 2016 and February 2018, overlooking two seasonal surface lakes. The first camera ("camera 1") was installed at approximately S68.67729 E78.35642 and an elevation of 160 m above sea level overlooking a horseshoe-shaped surface lake on 29 November 2016 at approx UTC 6.50, pointing in an approximately northerly direction. The camera was approximately 3.5 m above the ice surface at deployment, atop a tower supported by legs drilled into the ice. The camera was a Canon EOS 6D, programmed to take images at 2 hour intervals using a Harbortronics(TM) Digisnap time lapse control system, with the camera set to aperture priority exposure mode at f8, auto ISO with a maximum ISO 10000 setting. The lens used was a Canon L series 24-70 mm f4 lens, with focal length set to approx 35 mm, manually focused at deployment, focus and zoom rings secured with electrical tape. The logger clock was set to UTC, and the time stamp for each image is recorded in the jpeg exif data. The second camera ("camera 2") was installed Installed at S68 41.070' E78 30.011' elevation 190 m on 07 December 2016 at approx UTC 7.00, pointing in an approximately west-north-westerly direction. the elevation of the camera was approximately 3.5 m above the ice surface at deployment, atop a tower drilled into the ice. Camera 2 was likewise a Canon EOS 6D with identical exposure settings to camera 1, also programmed to take pictures every two hours. The lens used was a Canon L series 70-200 mm f4 lens set to 70 mm, manually focused with focus and zoom rings secured by tape. programmed at 2 hour interval, infinite number of shots power on for 60 s, 15 s delay on power up, 2 second shutter activation Canon EOA 6D, aperture priority at f8, auto ISO, max ISO 10000, approx 70 mm on 70-200 mm, manual focus set at deployment, focus and zoom rings secured with electrical tape. The camera clock was set to UTC, and time stamps for each image are recorded in the exif data. Camera 2 suffered battery failure in May 2017 and was decommissioned in November 2017 in order to prevent the camera tower becoming inaccessible as the melt pond filled during the summer. The motion of the glacier was estimated to have transported the camera close enough to the likely shoreline of the lake at full extent for access to become a potential issue. |
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