http://bolin.su.se/data/tarfala-kirchner-2023-ice-off-2021-1 Nina Kirchner, Annika Granebeck, Daniella Lillieroth Charalambous Bolin Centre Database 2023 Datafile Lacustrine Observations Lake Tarfala Tarfala Lake ice Lake ice phenology Ice-off Earth science > Cryosphere > Snow/ice > Lake ice Nina Kirchner 2023-05-09T14:12:55+00:00 English 1 The dataset consists of image files (`JPG`) of Lake Tarfala, with the date and time (Swedish daylight saving time, UTC+2) included in each photo. Due to complications with the date-and-time-stamp function of the camera during parts of the measurement series, incorrect dates and times are shown in the images taken between 1 and 23 June. Please refer to image file names for corrected dates and times, which follow the `YYYYMMDD_HHMM` format. Because of battery failure, no pictures were taken between 24 June and 5 July. The pictures were acquired using a camera positioned on the mountain flank along Lake Tarfala’s north-eastern shore, at ~67.9° N, 18.6° E, at 1220 m above sea level. The data were collected using a SiFar Willfine Trail Camera 4.0CG. The camera elevation is 1.8 m above ground. Each JPG file has a size of ~1 MB. The total size of the dataset is ~394 MB. During a few short periods, fog, snow and/or rain obscures the view of the lake. The support of our co-workers on the Arctic Avenue activity *Lake thermal and mixing dynamics under changing climate* (J. Weckström, K. Weckström, A. Korhola, and F. Schenk) is gratefully acknowledged.