Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019)
Abstract The northern Antarctic Peninsula is a key region of the Southern Ocean due to its complex ocean dynamics, distinct water mass sources, and the climate‐driven changes taking place in the region. Despite the importance of macronutrients in supporting strong biological carbon uptake and storag...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.1002/lno.12424 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12424 |
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crwiley:10.1002/lno.12424 2024-06-02T07:57:44+00:00 Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019) Monteiro, Thiago Henley, Sian F. Pollery, Ricardo César Gonçalves Mendes, Carlos Rafael Borges Mata, Mauricio Tavano, Virginia Maria Garcia, Carlos Alberto Eiras Kerr, Rodrigo Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior 2023 http://dx.doi.org/10.1002/lno.12424 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12424 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 68, issue 10, page 2305-2326 ISSN 0024-3590 1939-5590 journal-article 2023 crwiley https://doi.org/10.1002/lno.12424 2024-05-03T11:45:51Z Abstract The northern Antarctic Peninsula is a key region of the Southern Ocean due to its complex ocean dynamics, distinct water mass sources, and the climate‐driven changes taking place in the region. Despite the importance of macronutrients in supporting strong biological carbon uptake and storage, little is known about their spatiotemporal variability along the northern Antarctic Peninsula. Hence, we explored for the first time a 24‐year time series (1996–2019) in this region to understand the processes involved in the spatial and interannual variability of macronutrients. We found high macronutrient concentrations, even in surface waters and during strong phytoplankton blooms. Minimum concentrations of dissolved inorganic nitrogen (DIN; 16 μ mol kg −1 ), phosphate (0.7 μ mol kg −1 ), and silicic acid (40 μ mol kg −1 ) in surface waters are higher than those recorded in surrounding regions. The main source of macronutrients is the intrusions of Circumpolar Deep Water and its modified variety, while local sources (organic matter remineralization, water mass mixing, and mesoscale structures) can enhance their spatiotemporal variability. However, we identified a depletion in silicic acid due to the influence of Dense Shelf Water from the Weddell Sea. Macronutrient concentrations show substantial interannual variability driven by the balance between the intrusions of modified Circumpolar Deep Water and advection of Dense Shelf Water, which is largely modulated by the Southern Annular Mode (SAM) and to some extent by El Niño‐Southern Oscillation (ENSO). These findings are critical to improving our understanding of the natural variability of this Southern Ocean ecosystem and how it is responding to climate changes. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Southern Ocean Weddell Sea Wiley Online Library Antarctic Antarctic Peninsula Southern Ocean Weddell Weddell Sea Limnology and Oceanography |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The northern Antarctic Peninsula is a key region of the Southern Ocean due to its complex ocean dynamics, distinct water mass sources, and the climate‐driven changes taking place in the region. Despite the importance of macronutrients in supporting strong biological carbon uptake and storage, little is known about their spatiotemporal variability along the northern Antarctic Peninsula. Hence, we explored for the first time a 24‐year time series (1996–2019) in this region to understand the processes involved in the spatial and interannual variability of macronutrients. We found high macronutrient concentrations, even in surface waters and during strong phytoplankton blooms. Minimum concentrations of dissolved inorganic nitrogen (DIN; 16 μ mol kg −1 ), phosphate (0.7 μ mol kg −1 ), and silicic acid (40 μ mol kg −1 ) in surface waters are higher than those recorded in surrounding regions. The main source of macronutrients is the intrusions of Circumpolar Deep Water and its modified variety, while local sources (organic matter remineralization, water mass mixing, and mesoscale structures) can enhance their spatiotemporal variability. However, we identified a depletion in silicic acid due to the influence of Dense Shelf Water from the Weddell Sea. Macronutrient concentrations show substantial interannual variability driven by the balance between the intrusions of modified Circumpolar Deep Water and advection of Dense Shelf Water, which is largely modulated by the Southern Annular Mode (SAM) and to some extent by El Niño‐Southern Oscillation (ENSO). These findings are critical to improving our understanding of the natural variability of this Southern Ocean ecosystem and how it is responding to climate changes. |
author2 |
Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior |
format |
Article in Journal/Newspaper |
author |
Monteiro, Thiago Henley, Sian F. Pollery, Ricardo César Gonçalves Mendes, Carlos Rafael Borges Mata, Mauricio Tavano, Virginia Maria Garcia, Carlos Alberto Eiras Kerr, Rodrigo |
spellingShingle |
Monteiro, Thiago Henley, Sian F. Pollery, Ricardo César Gonçalves Mendes, Carlos Rafael Borges Mata, Mauricio Tavano, Virginia Maria Garcia, Carlos Alberto Eiras Kerr, Rodrigo Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019) |
author_facet |
Monteiro, Thiago Henley, Sian F. Pollery, Ricardo César Gonçalves Mendes, Carlos Rafael Borges Mata, Mauricio Tavano, Virginia Maria Garcia, Carlos Alberto Eiras Kerr, Rodrigo |
author_sort |
Monteiro, Thiago |
title |
Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019) |
title_short |
Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019) |
title_full |
Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019) |
title_fullStr |
Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019) |
title_full_unstemmed |
Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019) |
title_sort |
spatiotemporal variability of dissolved inorganic macronutrients along the northern antarctic peninsula (1996–2019) |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/lno.12424 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12424 |
geographic |
Antarctic Antarctic Peninsula Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Southern Ocean Weddell Sea |
op_source |
Limnology and Oceanography volume 68, issue 10, page 2305-2326 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.12424 |
container_title |
Limnology and Oceanography |
_version_ |
1800740926499323904 |