Published July 11, 2025 | Version 1
Dataset Open

Time-Lapse Records of Lake Ice Phenology from 10 Small Arctic Lakes in North-West Finnish Lapland, 2020  – ⁠2022

Description

Field camera records, capturing the freezing (ice-on) and melting (ice-off) progression of 10 small lakes in north-west Finnish Lapland from fall 2020 to spring 2022. One trail camera (Willfine 4.0 P-CG, 100° FOV) was installed along the shore of each study lake. At low elevations (< 300 m a.s.l.), cameras were positioned at by the lakeshoreline, approx. 2 m above ground. At high elevations (> 700 m a.s.l.), cameras stood at distances of 50–150 m from the shoreline, 5–15 m above the lake. Most of each lake's surface is in frame (see overview figure). Images were recorded bi-hourly. Records of the following lakes are included:

Lake

Coordinates

Elevation

Area

Max.

depth

Secchi

depth

Field records

 

[°N, °E]

[m a.s.l.]

[ha]

[m]

[m]

On 20

Off 21

On 21

Off 22

wfl5

Jänkkäjärvi

68.099,

23.394

248

4.3

3.4

2.7

x

 

 

x

wfl29

Etu-Vuossijärvi

68.100,

23.412

246

4.0

8.5

3.0

x

x

x

x

wfl6

Kirjoituskannonriipi

68.128,

23.355

251

1.5

4.3

≥ 4.3

x

 

 

 

wfl30

68.132,

23.357

251

1.3

4.0

3.1

x

x

x

 

wfl11

Pikku Saarijärvi

68.398,

22.853

313

2.2

4.0

≥ 4.0

x

 

x

x

wfl12

68.442,

22.590

333

2.0

1.9

≥ 1.9

x

 

 

 

wfl13

68.468,

22.432

323

2.6

4.0

≥ 4.0

x

x

x

x

wfl54

69.033,

21.120

797

9.3

8.0

7.0

x

 

x

x

wfl55

Jágonajávri

69.057,

21.211

774

20.4

2.0

≥ 2.0

 

 

x

 

wfl56

69.173,

21.046

1011

9.6

15.0

≥ 15.0

x

x

 

 

 

Note: Files are named after their creation date and time. Due to camera-internal time resetting, some field records' EXIF dates had to be reconstructed. The following table lists records with incorrect timestamps and their correction.

Lake Season Incorrectly labeled starting date Correct starting date
wfl5 Ice-off 2022 2022.05.15_06.00 2022.05.12_06.00
wfl30 Ice-off 2021 2021.05.15_10.00 2021.05.16_10.00
wfl11 Ice-off 2022 2022.05.18_04.39 2022.05.19_04.39
wfl13 Ice-off 2022 2022.05.13_20.20 2022.05.14_20.20
wfl55 Ice-on 2021 2021.09.07_09.30 2021.10.07_09.30
wfl56 Ice-off 2021 2021.05.18_14.00 2021.05.19_14.00

Files

Camera_Sites.pdf

Files (12.6 GB)

Name Size
md5:84f0e1f274200b01522da9cdd9abca68
4.1 MB Preview Download
md5:321f5ce7445c90f457e8c0b21b32dd32
12.6 GB Preview Download

Additional details

Dates

Collected
2020-09/2022-06
Time-lapse collection period