http://bolin.su.se/data/tarfala-kirchner-2025-ice-off-2024-1 Nina Kirchner, Johanna Dahlkvist, Jamie Barnett, Daniella Lillieroth Charalambous, Carl Hernqvist Larsson Bolin Centre Database 2025 Datafile Lacustrine Lake Ice Darfáljávri Lake Tarfala Tarfala Lake ice Lake ice phenology Ice-off Earth science Nina Kirchner 2025-05-31T14:21:04+00:00 English 1 The dataset consists of image files (JPG) of Darfáljávri, with the date and time (Swedish daylight saving time, UTC+2) included in each photo. Image file names are numbered in chronological order. The pictures were acquired using a camera positioned on the mountain flank along Darfáljávri’s north-eastern shore, at ~67.9° N, 18.6° E, at 1220 m above sea level. The data were collected using a Hunter Orion Trail Camera 4G. The camera elevation is 1.8 m above ground. Each JPG file has a size of ~2.26 MB. The total size of the dataset is ~1.40 GB. During a few short periods, fog, snow and/or rain obscures the view of the lake.