Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land
Abstract Shallow Antarctic surface lakes belong to the most extreme aquatic environments on the Earth. In Vestfjella, proglacial surface lakes and ponds are characterized by a 2–5 month long period with liquid water and depths < 2 m. We give a detailed description of nine seasonal lakes and ponds...
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crcambridgeupr:10.1017/s0954102019000555 2024-03-03T08:38:56+00:00 Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land Leppäranta, Matti Luttinen, Arto Arvola, Lauri 2020 http://dx.doi.org/10.1017/s0954102019000555 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000555 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 32, issue 1, page 29-42 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2020 crcambridgeupr https://doi.org/10.1017/s0954102019000555 2024-02-08T08:39:20Z Abstract Shallow Antarctic surface lakes belong to the most extreme aquatic environments on the Earth. In Vestfjella, proglacial surface lakes and ponds are characterized by a 2–5 month long period with liquid water and depths < 2 m. We give a detailed description of nine seasonal lakes and ponds situating at three nunataqs (Basen, Plogen and Fossilryggen) in western Dronning Maud Land. Their physical and geochemical properties are provided based on observations in four summers. Three main ‘lake categories‘ were found: 1) supraglacial lakes, 2) epiglacial ponds and 3) nunataq ponds. Category 3 lakes can be divided into two subgroups with regards to whether the meltwater source is glacial or just seasonal snow patches. Supraglacial lakes are ultra-oligotrophic (electrical conductivity < 10 μS cm −1 , pH < 7), while in epiglacial ponds the concentrations of dissolved and suspended matter and trophic status vary over a wide range (electrical conductivity 20–110 μS cm −1 , pH 6–9). In nunataq ponds, the maxima were an electrical conductivity of 1042 μS cm −1 and a pH of 10.1, and water temperature may have wide diurnal and day-to-day fluctuations (maximum 9.3°C) because snowfall, snow drift and sublimation influence the net solar irradiance. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Dronning Maud Land Cambridge University Press Antarctic Dronning Maud Land Vestfjella ENVELOPE(-14.000,-14.000,-73.167,-73.167) Basen ENVELOPE(-13.400,-13.400,-73.333,-73.333) Fossilryggen ENVELOPE(-13.050,-13.050,-73.383,-73.383) Plogen ENVELOPE(-13.783,-13.783,-73.217,-73.217) Antarctic Science 32 1 29 42 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Leppäranta, Matti Luttinen, Arto Arvola, Lauri Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Shallow Antarctic surface lakes belong to the most extreme aquatic environments on the Earth. In Vestfjella, proglacial surface lakes and ponds are characterized by a 2–5 month long period with liquid water and depths < 2 m. We give a detailed description of nine seasonal lakes and ponds situating at three nunataqs (Basen, Plogen and Fossilryggen) in western Dronning Maud Land. Their physical and geochemical properties are provided based on observations in four summers. Three main ‘lake categories‘ were found: 1) supraglacial lakes, 2) epiglacial ponds and 3) nunataq ponds. Category 3 lakes can be divided into two subgroups with regards to whether the meltwater source is glacial or just seasonal snow patches. Supraglacial lakes are ultra-oligotrophic (electrical conductivity < 10 μS cm −1 , pH < 7), while in epiglacial ponds the concentrations of dissolved and suspended matter and trophic status vary over a wide range (electrical conductivity 20–110 μS cm −1 , pH 6–9). In nunataq ponds, the maxima were an electrical conductivity of 1042 μS cm −1 and a pH of 10.1, and water temperature may have wide diurnal and day-to-day fluctuations (maximum 9.3°C) because snowfall, snow drift and sublimation influence the net solar irradiance. |
format |
Article in Journal/Newspaper |
author |
Leppäranta, Matti Luttinen, Arto Arvola, Lauri |
author_facet |
Leppäranta, Matti Luttinen, Arto Arvola, Lauri |
author_sort |
Leppäranta, Matti |
title |
Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land |
title_short |
Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land |
title_full |
Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land |
title_fullStr |
Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land |
title_full_unstemmed |
Physics and geochemistry of lakes in Vestfjella, Dronning Maud Land |
title_sort |
physics and geochemistry of lakes in vestfjella, dronning maud land |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/s0954102019000555 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000555 |
long_lat |
ENVELOPE(-14.000,-14.000,-73.167,-73.167) ENVELOPE(-13.400,-13.400,-73.333,-73.333) ENVELOPE(-13.050,-13.050,-73.383,-73.383) ENVELOPE(-13.783,-13.783,-73.217,-73.217) |
geographic |
Antarctic Dronning Maud Land Vestfjella Basen Fossilryggen Plogen |
geographic_facet |
Antarctic Dronning Maud Land Vestfjella Basen Fossilryggen Plogen |
genre |
Antarc* Antarctic Antarctic Science Dronning Maud Land |
genre_facet |
Antarc* Antarctic Antarctic Science Dronning Maud Land |
op_source |
Antarctic Science volume 32, issue 1, page 29-42 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102019000555 |
container_title |
Antarctic Science |
container_volume |
32 |
container_issue |
1 |
container_start_page |
29 |
op_container_end_page |
42 |
_version_ |
1792494340084334592 |