Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern Sweden
In the rapidly warming circumpolar Arctic, recent research of lakes has focused on their climatology and ecology but is challenged by sparsity of wintertime data. At the c. 48-m-deep and c. 0.5-km2 large proglacial Darfáljávri (Lake Tarfala), located in an arctic–alpine environment in the Scandinavi...
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Taylor & Francis Group
2024-12-01
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| Series: | Arctic, Antarctic, and Alpine Research |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/15230430.2023.2287704 |
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| author | Nina Kirchner Jan Weckström Joachim Jansen Frederik Schenk Jamie Barnett Annika Granebeck Matti Leppäranta Atte Korhola |
| author_facet | Nina Kirchner Jan Weckström Joachim Jansen Frederik Schenk Jamie Barnett Annika Granebeck Matti Leppäranta Atte Korhola |
| author_sort | Nina Kirchner |
| collection | DOAJ |
| description | In the rapidly warming circumpolar Arctic, recent research of lakes has focused on their climatology and ecology but is challenged by sparsity of wintertime data. At the c. 48-m-deep and c. 0.5-km2 large proglacial Darfáljávri (Lake Tarfala), located in an arctic–alpine environment in the Scandinavian Mountains, year-round water temperatures were previously reported for 2016 to 2019. Here, this record is continued for 2019–2020 and 2021–2022, complemented by time-lapse imagery records of the state of the lake surface, as well as degree-day modeling of ice phenology (timing of ice-on and ice-off). Darfáljávri is cryostratified during winter, with interannual variations in the thermocline’s thickness and temperature range. The ice season lasts from October to July. Modeled ice-on dates match observed ones reasonably well; however, observed ice-off dates occur much later than modeled ones, likely because of cold impact from Darfáljávri’s glacial environment as inferred from a comparison with a close tundra lake. Though new insights into the complex lake mixing and ice phenology are provided, it remains to attribute the characteristics of Darfáljávri’s winter stratification to additional potential drivers, such as lake ice thickness, atmospheric heat fluxes, and the water balance of the lake. |
| format | Article |
| id | doaj-art-83e964dd1ddb46ae9f1ce1ac708579cc |
| institution | Kabale University |
| issn | 1523-0430 1938-4246 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Arctic, Antarctic, and Alpine Research |
| spelling | doaj-art-83e964dd1ddb46ae9f1ce1ac708579cc2025-01-13T14:40:40ZengTaylor & Francis GroupArctic, Antarctic, and Alpine Research1523-04301938-42462024-12-0156110.1080/15230430.2023.2287704Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern SwedenNina Kirchner0Jan Weckström1Joachim Jansen2Frederik Schenk3Jamie Barnett4Annika Granebeck5Matti Leppäranta6Atte Korhola7Department of Physical Geography, Stockholm University, Stockholm, SwedenEcosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences and Helsinki Institute of Sustainability Science (HELSUS), University of Helsinki, Helsinki, FinlandDepartment of Ecology and Genetics, Uppsala University, Uppsala, SwedenBolin Centre for Climate Research, Stockholm University, Stockholm, SwedenTarfala Research Station, Stockholm University, Stockholm, SwedenDepartment of Physical Geography, Stockholm University, Stockholm, SwedenInstitute of Atmospheric and Earth Sciences, University of Helsinki, Helsinki, FinlandEcosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences and Helsinki Institute of Sustainability Science (HELSUS), University of Helsinki, Helsinki, FinlandIn the rapidly warming circumpolar Arctic, recent research of lakes has focused on their climatology and ecology but is challenged by sparsity of wintertime data. At the c. 48-m-deep and c. 0.5-km2 large proglacial Darfáljávri (Lake Tarfala), located in an arctic–alpine environment in the Scandinavian Mountains, year-round water temperatures were previously reported for 2016 to 2019. Here, this record is continued for 2019–2020 and 2021–2022, complemented by time-lapse imagery records of the state of the lake surface, as well as degree-day modeling of ice phenology (timing of ice-on and ice-off). Darfáljávri is cryostratified during winter, with interannual variations in the thermocline’s thickness and temperature range. The ice season lasts from October to July. Modeled ice-on dates match observed ones reasonably well; however, observed ice-off dates occur much later than modeled ones, likely because of cold impact from Darfáljávri’s glacial environment as inferred from a comparison with a close tundra lake. Though new insights into the complex lake mixing and ice phenology are provided, it remains to attribute the characteristics of Darfáljávri’s winter stratification to additional potential drivers, such as lake ice thickness, atmospheric heat fluxes, and the water balance of the lake.https://www.tandfonline.com/doi/10.1080/15230430.2023.2287704Tarfalacryostratificationlake ice phenologytime-lapse imagerylake temperature |
| spellingShingle | Nina Kirchner Jan Weckström Joachim Jansen Frederik Schenk Jamie Barnett Annika Granebeck Matti Leppäranta Atte Korhola Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern Sweden Arctic, Antarctic, and Alpine Research Tarfala cryostratification lake ice phenology time-lapse imagery lake temperature |
| title | Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern Sweden |
| title_full | Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern Sweden |
| title_fullStr | Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern Sweden |
| title_full_unstemmed | Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern Sweden |
| title_short | Water temperature, mixing, and ice phenology in the arctic–alpine Lake Darfáljávri (Lake Tarfala), northern Sweden |
| title_sort | water temperature mixing and ice phenology in the arctic alpine lake darfaljavri lake tarfala northern sweden |
| topic | Tarfala cryostratification lake ice phenology time-lapse imagery lake temperature |
| url | https://www.tandfonline.com/doi/10.1080/15230430.2023.2287704 |
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