Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review)
As a net source of nutrients fuelling global primary production, changes in Southern Ocean productivity are expected to influence biological carbon storage across the global ocean. Following a high emissions, low mitigation pathway, primary productivity in the Southern Ocean is predicted to increase...
Main Authors: | , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
European Geosciences Union
2023
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/533403/ |
id |
ftnerc:oai:nora.nerc.ac.uk:533403 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:533403 2023-05-15T18:23:42+02:00 Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review) Fisher, Ben J. Poulton, Alex J. Meredith, Michael P. Baldry, Kimberlee Schofield, Oscar Henley, Sian F. 2023-01-23 http://nora.nerc.ac.uk/id/eprint/533403/ unknown European Geosciences Union Fisher, Ben J.; Poulton, Alex J.; Meredith, Michael P. orcid:0000-0002-7342-7756 Baldry, Kimberlee; Schofield, Oscar; Henley, Sian F. 2023 Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review). Biogeosciences Discussions. https://doi.org/10.5194/bg-2023-10 <https://doi.org/10.5194/bg-2023-10> Publication - Article PeerReviewed 2023 ftnerc https://doi.org/10.5194/bg-2023-10 2023-02-04T19:53:40Z As a net source of nutrients fuelling global primary production, changes in Southern Ocean productivity are expected to influence biological carbon storage across the global ocean. Following a high emissions, low mitigation pathway, primary productivity in the Southern Ocean is predicted to increase by up to 40 % over the 21st century. The ecophysiological response of marine phytoplankton experiencing climate change will be a key determinant in understanding the impact of Southern Ocean productivity shifts on the carbon cycle. Yet, phytoplankton ecophysiology is poorly represented in CMIP6 climate models, leading to substantial uncertainty in the representation of their role in carbon sequestration. Here we synthesise the existing spatial and temporal projections of Southern Ocean productivity from CMIP6 models, separated by phytoplankton class and identify key processes where greater observational data coverage can help to improve future model performance. We find bidirectional changes in iron and light limitation of phytoplankton, while the greatest changes in productivity occur in the coastal zone of the Southern Ocean. Different phytoplankton groups are responsible for driving productivity increases at different latitudes, yet we observe that models disagree on the ecological mechanism behind these productivity changes. We propose that an evidence-based sampling approach targeting climate-driven changes in ocean biogeochemistry and community assemblages in the regions of rapid projected productivity changes could help to resolve the empirical principles underlying phytoplankton community structure in the Southern Ocean. Article in Journal/Newspaper Southern Ocean Natural Environment Research Council: NERC Open Research Archive Southern Ocean |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
As a net source of nutrients fuelling global primary production, changes in Southern Ocean productivity are expected to influence biological carbon storage across the global ocean. Following a high emissions, low mitigation pathway, primary productivity in the Southern Ocean is predicted to increase by up to 40 % over the 21st century. The ecophysiological response of marine phytoplankton experiencing climate change will be a key determinant in understanding the impact of Southern Ocean productivity shifts on the carbon cycle. Yet, phytoplankton ecophysiology is poorly represented in CMIP6 climate models, leading to substantial uncertainty in the representation of their role in carbon sequestration. Here we synthesise the existing spatial and temporal projections of Southern Ocean productivity from CMIP6 models, separated by phytoplankton class and identify key processes where greater observational data coverage can help to improve future model performance. We find bidirectional changes in iron and light limitation of phytoplankton, while the greatest changes in productivity occur in the coastal zone of the Southern Ocean. Different phytoplankton groups are responsible for driving productivity increases at different latitudes, yet we observe that models disagree on the ecological mechanism behind these productivity changes. We propose that an evidence-based sampling approach targeting climate-driven changes in ocean biogeochemistry and community assemblages in the regions of rapid projected productivity changes could help to resolve the empirical principles underlying phytoplankton community structure in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Fisher, Ben J. Poulton, Alex J. Meredith, Michael P. Baldry, Kimberlee Schofield, Oscar Henley, Sian F. |
spellingShingle |
Fisher, Ben J. Poulton, Alex J. Meredith, Michael P. Baldry, Kimberlee Schofield, Oscar Henley, Sian F. Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review) |
author_facet |
Fisher, Ben J. Poulton, Alex J. Meredith, Michael P. Baldry, Kimberlee Schofield, Oscar Henley, Sian F. |
author_sort |
Fisher, Ben J. |
title |
Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review) |
title_short |
Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review) |
title_full |
Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review) |
title_fullStr |
Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review) |
title_full_unstemmed |
Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review) |
title_sort |
biogeochemistry of climate driven shifts in southern ocean primary producers (in review) |
publisher |
European Geosciences Union |
publishDate |
2023 |
url |
http://nora.nerc.ac.uk/id/eprint/533403/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Fisher, Ben J.; Poulton, Alex J.; Meredith, Michael P. orcid:0000-0002-7342-7756 Baldry, Kimberlee; Schofield, Oscar; Henley, Sian F. 2023 Biogeochemistry of climate driven shifts in Southern Ocean primary producers (in review). Biogeosciences Discussions. https://doi.org/10.5194/bg-2023-10 <https://doi.org/10.5194/bg-2023-10> |
op_doi |
https://doi.org/10.5194/bg-2023-10 |
_version_ |
1766203773800153088 |