Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer
Seasonal cycling in carbon, alkalinity, and nutrients in landfast sea ice in Hangar Cove, Adelaide Island, West Antarctic Peninsula, were investigated during winter, spring, and summer 2014–2015. Temporal dynamics were driven by changes in the ice-sea physicochemical conditions, ice-algal community...
Published in: | Limnology and Oceanography |
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Format: | Article in Journal/Newspaper |
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Wiley
2023
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Online Access: | http://nora.nerc.ac.uk/id/eprint/533550/ https://nora.nerc.ac.uk/id/eprint/533550/1/Limnology%20Oceanography%20-%202022%20-%20Jones%20-%20Carbon%20and%20nutrient%20cycling%20in%20Antarctic%20landfast%20sea%20ice%20from%20winter%20to%20summer.pdf https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lno.12260 |
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ftnerc:oai:nora.nerc.ac.uk:533550 2023-05-15T13:03:59+02:00 Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer Jones, Elizabeth M. Henley, Sian F. van Leeuwe, Maria A. Stefels, Jacqueline Meredith, Michael P. Fenton, Mairi Venables, Hugh J. 2023-01 text http://nora.nerc.ac.uk/id/eprint/533550/ https://nora.nerc.ac.uk/id/eprint/533550/1/Limnology%20Oceanography%20-%202022%20-%20Jones%20-%20Carbon%20and%20nutrient%20cycling%20in%20Antarctic%20landfast%20sea%20ice%20from%20winter%20to%20summer.pdf https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lno.12260 en eng Wiley https://nora.nerc.ac.uk/id/eprint/533550/1/Limnology%20Oceanography%20-%202022%20-%20Jones%20-%20Carbon%20and%20nutrient%20cycling%20in%20Antarctic%20landfast%20sea%20ice%20from%20winter%20to%20summer.pdf Jones, Elizabeth M.; Henley, Sian F.; van Leeuwe, Maria A.; Stefels, Jacqueline; Meredith, Michael P. orcid:0000-0002-7342-7756 Fenton, Mairi; Venables, Hugh J. 2023 Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer. Limnology and Oceanography, 68 (1). 208-231. https://doi.org/10.1002/lno.12260 <https://doi.org/10.1002/lno.12260> cc_by_4 CC-BY Publication - Article PeerReviewed 2023 ftnerc https://doi.org/10.1002/lno.12260 2023-02-04T19:53:44Z Seasonal cycling in carbon, alkalinity, and nutrients in landfast sea ice in Hangar Cove, Adelaide Island, West Antarctic Peninsula, were investigated during winter, spring, and summer 2014–2015. Temporal dynamics were driven by changes in the ice-sea physicochemical conditions, ice-algal community composition, and organic matter production. Winter sea ice was enriched with dissolved inorganic carbon (DIC) and inorganic nutrients from organic matter remineralization. Variations in alkalinity (Alk) and DIC indicated that abiotic calcium carbonate (ikaite) precipitation had taken place. Relative to other nutrients, low phosphate (PO4) concentrations potentially resulted from co-precipitation with ikaite. Seawater flooding and meltwater induced variability in the physical and biogeochemical properties in the upper ice in spring where nutrient resupply supported haptophyte productivity and increased particulate organic carbon (POC) in the interstitial layer. Rapid nitrate (NO3) and DIC (< 165 μmol kg−1) uptake occurred alongside substantial build-up of algal biomass (746 μg chlorophyll a L−1) and POC (6191 μmol L−1) during summer. Silicic acid drawdown followed NO3 depletion by approximately 1 month with a shift to diatom-dominated communities. Accumulation of PO4 in the lower ice layers in summer likely resulted from PO4 released during ikaite dissolution in the presence of biofilms. Increased Alk : DIC ratios in the lower ice and under-ice water suggested that ikaite dissolution buffered against meltwater dilution and enhanced the potential for atmospheric CO2 uptake. This study revealed strong seasonality in carbon and nutrient cycling in landfast sea ice and showed the importance of sea ice in biogeochemical cycling in seasonally ice-covered waters around Antarctica. Article in Journal/Newspaper Adelaide Island Antarc* Antarctic Antarctic Peninsula Antarctica Sea ice ice covered waters Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Adelaide Island ENVELOPE(-68.914,-68.914,-67.762,-67.762) Limnology and Oceanography |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Seasonal cycling in carbon, alkalinity, and nutrients in landfast sea ice in Hangar Cove, Adelaide Island, West Antarctic Peninsula, were investigated during winter, spring, and summer 2014–2015. Temporal dynamics were driven by changes in the ice-sea physicochemical conditions, ice-algal community composition, and organic matter production. Winter sea ice was enriched with dissolved inorganic carbon (DIC) and inorganic nutrients from organic matter remineralization. Variations in alkalinity (Alk) and DIC indicated that abiotic calcium carbonate (ikaite) precipitation had taken place. Relative to other nutrients, low phosphate (PO4) concentrations potentially resulted from co-precipitation with ikaite. Seawater flooding and meltwater induced variability in the physical and biogeochemical properties in the upper ice in spring where nutrient resupply supported haptophyte productivity and increased particulate organic carbon (POC) in the interstitial layer. Rapid nitrate (NO3) and DIC (< 165 μmol kg−1) uptake occurred alongside substantial build-up of algal biomass (746 μg chlorophyll a L−1) and POC (6191 μmol L−1) during summer. Silicic acid drawdown followed NO3 depletion by approximately 1 month with a shift to diatom-dominated communities. Accumulation of PO4 in the lower ice layers in summer likely resulted from PO4 released during ikaite dissolution in the presence of biofilms. Increased Alk : DIC ratios in the lower ice and under-ice water suggested that ikaite dissolution buffered against meltwater dilution and enhanced the potential for atmospheric CO2 uptake. This study revealed strong seasonality in carbon and nutrient cycling in landfast sea ice and showed the importance of sea ice in biogeochemical cycling in seasonally ice-covered waters around Antarctica. |
format |
Article in Journal/Newspaper |
author |
Jones, Elizabeth M. Henley, Sian F. van Leeuwe, Maria A. Stefels, Jacqueline Meredith, Michael P. Fenton, Mairi Venables, Hugh J. |
spellingShingle |
Jones, Elizabeth M. Henley, Sian F. van Leeuwe, Maria A. Stefels, Jacqueline Meredith, Michael P. Fenton, Mairi Venables, Hugh J. Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer |
author_facet |
Jones, Elizabeth M. Henley, Sian F. van Leeuwe, Maria A. Stefels, Jacqueline Meredith, Michael P. Fenton, Mairi Venables, Hugh J. |
author_sort |
Jones, Elizabeth M. |
title |
Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer |
title_short |
Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer |
title_full |
Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer |
title_fullStr |
Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer |
title_full_unstemmed |
Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer |
title_sort |
carbon and nutrient cycling in antarctic landfast sea ice from winter to summer |
publisher |
Wiley |
publishDate |
2023 |
url |
http://nora.nerc.ac.uk/id/eprint/533550/ https://nora.nerc.ac.uk/id/eprint/533550/1/Limnology%20Oceanography%20-%202022%20-%20Jones%20-%20Carbon%20and%20nutrient%20cycling%20in%20Antarctic%20landfast%20sea%20ice%20from%20winter%20to%20summer.pdf https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lno.12260 |
long_lat |
ENVELOPE(-68.914,-68.914,-67.762,-67.762) |
geographic |
Antarctic Antarctic Peninsula Adelaide Island |
geographic_facet |
Antarctic Antarctic Peninsula Adelaide Island |
genre |
Adelaide Island Antarc* Antarctic Antarctic Peninsula Antarctica Sea ice ice covered waters |
genre_facet |
Adelaide Island Antarc* Antarctic Antarctic Peninsula Antarctica Sea ice ice covered waters |
op_relation |
https://nora.nerc.ac.uk/id/eprint/533550/1/Limnology%20Oceanography%20-%202022%20-%20Jones%20-%20Carbon%20and%20nutrient%20cycling%20in%20Antarctic%20landfast%20sea%20ice%20from%20winter%20to%20summer.pdf Jones, Elizabeth M.; Henley, Sian F.; van Leeuwe, Maria A.; Stefels, Jacqueline; Meredith, Michael P. orcid:0000-0002-7342-7756 Fenton, Mairi; Venables, Hugh J. 2023 Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer. Limnology and Oceanography, 68 (1). 208-231. https://doi.org/10.1002/lno.12260 <https://doi.org/10.1002/lno.12260> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/lno.12260 |
container_title |
Limnology and Oceanography |
_version_ |
1766349633852801024 |