Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer
The West Antarctic Peninsula shelf is a region of high seasonal primary production which supports a large and productive food web, where macronutrients and inorganic carbon are sourced primarily from intrusions of warm saline Circumpolar Deep Water. We examined the cross-shelf modification of this w...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Royal Society
2018
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1098/rsta.2017.0168 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2017.0168 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2017.0168 |
id |
crroyalsociety:10.1098/rsta.2017.0168 |
---|---|
record_format |
openpolar |
spelling |
crroyalsociety:10.1098/rsta.2017.0168 2024-06-02T07:58:41+00:00 Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer Henley, Sian F. Jones, Elizabeth M. Venables, Hugh J. Meredith, Michael P. Firing, Yvonne L. Dittrich, Ribanna Heiser, Sabrina Stefels, Jacqueline Dougans, Julie UK Natural Environment Research Council 2018 http://dx.doi.org/10.1098/rsta.2017.0168 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2017.0168 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2017.0168 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 376, issue 2122, page 20170168 ISSN 1364-503X 1471-2962 journal-article 2018 crroyalsociety https://doi.org/10.1098/rsta.2017.0168 2024-05-07T14:16:41Z The West Antarctic Peninsula shelf is a region of high seasonal primary production which supports a large and productive food web, where macronutrients and inorganic carbon are sourced primarily from intrusions of warm saline Circumpolar Deep Water. We examined the cross-shelf modification of this water mass during mid-summer 2015 to understand the supply of nutrients and carbon to the productive surface ocean, and their subsequent uptake and cycling. We show that nitrate, phosphate, silicic acid and inorganic carbon are progressively enriched in subsurface waters across the shelf, contrary to cross-shelf reductions in heat, salinity and density. We use nutrient stoichiometric and isotopic approaches to invoke remineralization of organic matter, including nitrification below the euphotic surface layer, and dissolution of biogenic silica in deeper waters and potentially shelf sediment porewaters, as the primary drivers of cross-shelf enrichments. Regenerated nitrate and phosphate account for a significant proportion of the total pools of these nutrients in the upper ocean, with implications for the seasonal carbon sink. Understanding nutrient and carbon dynamics in this region now will inform predictions of future biogeochemical changes in the context of substantial variability and ongoing changes in the physical environment. This article is part of the theme issue ‘The marine system of the West Antarctic Peninsula: status and strategy for progress in a region of rapid change’. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula The Royal Society Antarctic Antarctic Peninsula The Antarctic Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 376 2122 20170168 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
The West Antarctic Peninsula shelf is a region of high seasonal primary production which supports a large and productive food web, where macronutrients and inorganic carbon are sourced primarily from intrusions of warm saline Circumpolar Deep Water. We examined the cross-shelf modification of this water mass during mid-summer 2015 to understand the supply of nutrients and carbon to the productive surface ocean, and their subsequent uptake and cycling. We show that nitrate, phosphate, silicic acid and inorganic carbon are progressively enriched in subsurface waters across the shelf, contrary to cross-shelf reductions in heat, salinity and density. We use nutrient stoichiometric and isotopic approaches to invoke remineralization of organic matter, including nitrification below the euphotic surface layer, and dissolution of biogenic silica in deeper waters and potentially shelf sediment porewaters, as the primary drivers of cross-shelf enrichments. Regenerated nitrate and phosphate account for a significant proportion of the total pools of these nutrients in the upper ocean, with implications for the seasonal carbon sink. Understanding nutrient and carbon dynamics in this region now will inform predictions of future biogeochemical changes in the context of substantial variability and ongoing changes in the physical environment. This article is part of the theme issue ‘The marine system of the West Antarctic Peninsula: status and strategy for progress in a region of rapid change’. |
author2 |
UK Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Henley, Sian F. Jones, Elizabeth M. Venables, Hugh J. Meredith, Michael P. Firing, Yvonne L. Dittrich, Ribanna Heiser, Sabrina Stefels, Jacqueline Dougans, Julie |
spellingShingle |
Henley, Sian F. Jones, Elizabeth M. Venables, Hugh J. Meredith, Michael P. Firing, Yvonne L. Dittrich, Ribanna Heiser, Sabrina Stefels, Jacqueline Dougans, Julie Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer |
author_facet |
Henley, Sian F. Jones, Elizabeth M. Venables, Hugh J. Meredith, Michael P. Firing, Yvonne L. Dittrich, Ribanna Heiser, Sabrina Stefels, Jacqueline Dougans, Julie |
author_sort |
Henley, Sian F. |
title |
Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer |
title_short |
Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer |
title_full |
Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer |
title_fullStr |
Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer |
title_full_unstemmed |
Macronutrient and carbon supply, uptake and cycling across the Antarctic Peninsula shelf during summer |
title_sort |
macronutrient and carbon supply, uptake and cycling across the antarctic peninsula shelf during summer |
publisher |
The Royal Society |
publishDate |
2018 |
url |
http://dx.doi.org/10.1098/rsta.2017.0168 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2017.0168 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2017.0168 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 376, issue 2122, page 20170168 ISSN 1364-503X 1471-2962 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.2017.0168 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
376 |
container_issue |
2122 |
container_start_page |
20170168 |
_version_ |
1800742136535056384 |