Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate
Climate change is impacting lakes and ponds in Antarctica. To that end, we investigated the distribution and chemical composition of ice-covered ponds in Untersee Oasis, East Antarctica. Thirty-nine ponds were inventoried, and the thirteen sampled ponds have low total dissolved solutes (TDS) with a...
Published in: | Arctic, Antarctic, and Alpine Research |
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Taylor & Francis Group
2021
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Online Access: | https://doi.org/10.1080/15230430.2021.2000566 https://doaj.org/article/a64ca06215a4426eac0c49e4bdb7d8f2 |
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ftdoajarticles:oai:doaj.org/article:a64ca06215a4426eac0c49e4bdb7d8f2 2023-05-15T14:06:39+02:00 Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate Benoit Faucher Denis Lacelle Nicole B. Marsh David A. Fisher Dale T. Andersen 2021-01-01T00:00:00Z https://doi.org/10.1080/15230430.2021.2000566 https://doaj.org/article/a64ca06215a4426eac0c49e4bdb7d8f2 EN eng Taylor & Francis Group http://dx.doi.org/10.1080/15230430.2021.2000566 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2021.2000566 https://doaj.org/article/a64ca06215a4426eac0c49e4bdb7d8f2 Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 324-339 (2021) ice-covered ponds isotope geochemistry modeling freezing evaporation dronning maud land Environmental sciences GE1-350 Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.1080/15230430.2021.2000566 2022-12-31T14:50:01Z Climate change is impacting lakes and ponds in Antarctica. To that end, we investigated the distribution and chemical composition of ice-covered ponds in Untersee Oasis, East Antarctica. Thirty-nine ponds were inventoried, and the thirteen sampled ponds have low total dissolved solutes (TDS) with a Ca(Na)-SO4 or Na-Cl geochemical facies. Tritium and radiocarbon measurements of the total inorganic carbon (TIC) suggest that the ponds are recharged by modern snowmelt. Hierarchical cluster analysis grouped the ponds based on the amount of potential incoming solar radiation reaching their surface. Ponds receiving higher insolation develop moats or completely lose their ice cover during summer, have lower pH, and higher TDS, δ18O, total inorganic carbon, and δ13CTIC,which suggest CO2 availability is not limiting benthic photosynthetic activity. The ponds that receive lower insolation retain their full ice cover and remain well-sealed to direct exchanges with the atmosphere, have high pH, and lower TDS and TIC, and likely host a CO2-starved benthic microbial ecosystem. Therefore, the state of the ponds’ ice cover evolved their hydrochemistry along different trajectories. The findings can be used to predict the trajectory of the chemical composition of the ponds and effect on biological productivity as the phenology of their ice cover shifts under a warming climate. Article in Journal/Newspaper Antarc* Antarctic and Alpine Research Antarctica Arctic Dronning Maud Land East Antarctica Directory of Open Access Journals: DOAJ Articles Dronning Maud Land East Antarctica Untersee ENVELOPE(13.467,13.467,-71.350,-71.350) Arctic, Antarctic, and Alpine Research 53 1 324 339 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ice-covered ponds isotope geochemistry modeling freezing evaporation dronning maud land Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
ice-covered ponds isotope geochemistry modeling freezing evaporation dronning maud land Environmental sciences GE1-350 Ecology QH540-549.5 Benoit Faucher Denis Lacelle Nicole B. Marsh David A. Fisher Dale T. Andersen Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate |
topic_facet |
ice-covered ponds isotope geochemistry modeling freezing evaporation dronning maud land Environmental sciences GE1-350 Ecology QH540-549.5 |
description |
Climate change is impacting lakes and ponds in Antarctica. To that end, we investigated the distribution and chemical composition of ice-covered ponds in Untersee Oasis, East Antarctica. Thirty-nine ponds were inventoried, and the thirteen sampled ponds have low total dissolved solutes (TDS) with a Ca(Na)-SO4 or Na-Cl geochemical facies. Tritium and radiocarbon measurements of the total inorganic carbon (TIC) suggest that the ponds are recharged by modern snowmelt. Hierarchical cluster analysis grouped the ponds based on the amount of potential incoming solar radiation reaching their surface. Ponds receiving higher insolation develop moats or completely lose their ice cover during summer, have lower pH, and higher TDS, δ18O, total inorganic carbon, and δ13CTIC,which suggest CO2 availability is not limiting benthic photosynthetic activity. The ponds that receive lower insolation retain their full ice cover and remain well-sealed to direct exchanges with the atmosphere, have high pH, and lower TDS and TIC, and likely host a CO2-starved benthic microbial ecosystem. Therefore, the state of the ponds’ ice cover evolved their hydrochemistry along different trajectories. The findings can be used to predict the trajectory of the chemical composition of the ponds and effect on biological productivity as the phenology of their ice cover shifts under a warming climate. |
format |
Article in Journal/Newspaper |
author |
Benoit Faucher Denis Lacelle Nicole B. Marsh David A. Fisher Dale T. Andersen |
author_facet |
Benoit Faucher Denis Lacelle Nicole B. Marsh David A. Fisher Dale T. Andersen |
author_sort |
Benoit Faucher |
title |
Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate |
title_short |
Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate |
title_full |
Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate |
title_fullStr |
Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate |
title_full_unstemmed |
Ice-covered ponds in the Untersee Oasis (East Antarctica): Distribution, chemical composition, and trajectory under a warming climate |
title_sort |
ice-covered ponds in the untersee oasis (east antarctica): distribution, chemical composition, and trajectory under a warming climate |
publisher |
Taylor & Francis Group |
publishDate |
2021 |
url |
https://doi.org/10.1080/15230430.2021.2000566 https://doaj.org/article/a64ca06215a4426eac0c49e4bdb7d8f2 |
long_lat |
ENVELOPE(13.467,13.467,-71.350,-71.350) |
geographic |
Dronning Maud Land East Antarctica Untersee |
geographic_facet |
Dronning Maud Land East Antarctica Untersee |
genre |
Antarc* Antarctic and Alpine Research Antarctica Arctic Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctic and Alpine Research Antarctica Arctic Dronning Maud Land East Antarctica |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 324-339 (2021) |
op_relation |
http://dx.doi.org/10.1080/15230430.2021.2000566 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2021.2000566 https://doaj.org/article/a64ca06215a4426eac0c49e4bdb7d8f2 |
op_doi |
https://doi.org/10.1080/15230430.2021.2000566 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
53 |
container_issue |
1 |
container_start_page |
324 |
op_container_end_page |
339 |
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1766278651864678400 |