Submesoscale effects on changes to export production under global warming
We examine the effects of the submesoscale in mediating the response to projected warming of phytoplankton new production and export using idealized biogeochemical tracers in a high-resolution regional model of the Porcupine Abyssal Plain region of the North Atlantic. We quantify submesoscale effect...
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ftncar:oai:drupal-site.org:articles_26181 2023-05-15T17:34:38+02:00 Submesoscale effects on changes to export production under global warming Brett, Genevieve Jay (author) Whitt, Daniel B (author) Long, Matthew C (author) Bryan, Frank O. (author) Feloy, Kate (author) Richards, Kelvin J. (author) 2023-03 https://doi.org/10.1029/2022GB007619 en eng Global Biogeochemical Cycles--Global Biogeochemical Cycles--0886-6236--1944-9224 LES and ROMS software as modified for NCAR Pre-field Modelling Studies in support of TPOS--10.5281/zenodo.5716181 Data to reproduce paper: Submesoscale effects on changes to export production under global warming--10.5281/zenodo.7314613 gjayb/submesoBioROMS: Release with paper submission--10.5281/zenodo.7315814 articles:26181 doi:10.1029/2022GB007619 ark:/85065/d7xs60b6 Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2023 ftncar https://doi.org/10.1029/2022GB007619 2023-04-10T18:09:07Z We examine the effects of the submesoscale in mediating the response to projected warming of phytoplankton new production and export using idealized biogeochemical tracers in a high-resolution regional model of the Porcupine Abyssal Plain region of the North Atlantic. We quantify submesoscale effects by comparing our control run to an integration in which submesoscale motions have been suppressed using increased viscosity. Annual new production is slightly reduced by submesoscale motions in a climate representative of the early 21st-century and slightly increased by submesoscale motions in a climate representative of the late 21st-century. The warmer climate at the end of the 21st century reduces resolved submesoscale activity by a factor of 2-3. Resolving the submesoscale, however, does not strongly impact the projected reduction in annual production under representative warming. Organic carbon export from the surface ocean includes both direct sinking of detritus (the biological gravitational pump) and advective transport mediated pathways; the sinking component is larger than advectively mediated vertical transport by up to an order of magnitude across a wide range of imposed sinking rates. The submesoscales are responsible for most of the advective carbon export, however, which is thus largely reduced in a warmer climate. In summary, our results demonstrate that resolving more of the submesoscale has a modest effect on present-day new production, a small effect on simulated reductions in new production under global warming, and a large effect on advectively mediated export fluxes. 1852977 80NSSC19K1116 NA18OAR4310408 1658541 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Global Biogeochemical Cycles 37 3 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
We examine the effects of the submesoscale in mediating the response to projected warming of phytoplankton new production and export using idealized biogeochemical tracers in a high-resolution regional model of the Porcupine Abyssal Plain region of the North Atlantic. We quantify submesoscale effects by comparing our control run to an integration in which submesoscale motions have been suppressed using increased viscosity. Annual new production is slightly reduced by submesoscale motions in a climate representative of the early 21st-century and slightly increased by submesoscale motions in a climate representative of the late 21st-century. The warmer climate at the end of the 21st century reduces resolved submesoscale activity by a factor of 2-3. Resolving the submesoscale, however, does not strongly impact the projected reduction in annual production under representative warming. Organic carbon export from the surface ocean includes both direct sinking of detritus (the biological gravitational pump) and advective transport mediated pathways; the sinking component is larger than advectively mediated vertical transport by up to an order of magnitude across a wide range of imposed sinking rates. The submesoscales are responsible for most of the advective carbon export, however, which is thus largely reduced in a warmer climate. In summary, our results demonstrate that resolving more of the submesoscale has a modest effect on present-day new production, a small effect on simulated reductions in new production under global warming, and a large effect on advectively mediated export fluxes. 1852977 80NSSC19K1116 NA18OAR4310408 1658541 |
author2 |
Brett, Genevieve Jay (author) Whitt, Daniel B (author) Long, Matthew C (author) Bryan, Frank O. (author) Feloy, Kate (author) Richards, Kelvin J. (author) |
format |
Article in Journal/Newspaper |
title |
Submesoscale effects on changes to export production under global warming |
spellingShingle |
Submesoscale effects on changes to export production under global warming |
title_short |
Submesoscale effects on changes to export production under global warming |
title_full |
Submesoscale effects on changes to export production under global warming |
title_fullStr |
Submesoscale effects on changes to export production under global warming |
title_full_unstemmed |
Submesoscale effects on changes to export production under global warming |
title_sort |
submesoscale effects on changes to export production under global warming |
publishDate |
2023 |
url |
https://doi.org/10.1029/2022GB007619 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Global Biogeochemical Cycles--Global Biogeochemical Cycles--0886-6236--1944-9224 LES and ROMS software as modified for NCAR Pre-field Modelling Studies in support of TPOS--10.5281/zenodo.5716181 Data to reproduce paper: Submesoscale effects on changes to export production under global warming--10.5281/zenodo.7314613 gjayb/submesoBioROMS: Release with paper submission--10.5281/zenodo.7315814 articles:26181 doi:10.1029/2022GB007619 ark:/85065/d7xs60b6 |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1029/2022GB007619 |
container_title |
Global Biogeochemical Cycles |
container_volume |
37 |
container_issue |
3 |
_version_ |
1766133537738588160 |