Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period
We investigate the propagation of climatic events on ocean stratification, marine biology, and CO2 using a large-scale ocean general circulation model coupled to a simple biogeochemical model of plankton dynamics and the carbon cycle. The model was forced with satellite and reanalysis fields during...
Published in: | Journal of Geophysical Research |
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2003
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/32681/ https://doi.org/10.1029/2001JC000920 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:32681 2023-05-15T13:55:07+02:00 Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period Le Quéré, Corinne Aumont, Olivier Monfray, Patrick Orr, James 2003 https://ueaeprints.uea.ac.uk/id/eprint/32681/ https://doi.org/10.1029/2001JC000920 unknown Le Quéré, Corinne, Aumont, Olivier, Monfray, Patrick and Orr, James (2003) Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period. Journal of Geophysical Research, 108 (C12). ISSN 0148-0227 doi:10.1029/2001JC000920 Article PeerReviewed 2003 ftuniveastangl https://doi.org/10.1029/2001JC000920 2023-03-23T23:31:45Z We investigate the propagation of climatic events on ocean stratification, marine biology, and CO2 using a large-scale ocean general circulation model coupled to a simple biogeochemical model of plankton dynamics and the carbon cycle. The model was forced with satellite and reanalysis fields during 1979-1999. We focus on three climatic events: (1) the North Atlantic Oscillation, (2) El Niño events, and (3) the Antarctic Circumpolar Wave. Such climatic events caused variability in ocean stratification, approximated by the mixing depth (MD), from ±20 m in the subtropics to ±100 s of meters at high latitudes. In the subtropics, deepening of the MD resupplied nutrient-impoverished surface waters and increased marine biomass by 20-100%. In contrast, at high latitudes, shoaling of the MD lengthened the growing season (i.e., the length of time that light is available for plankton growth) and increased marine biomass by 10-20%. Variability in marine biology reached global peak-to-peak values of ±0.01 mg m-3 for surface chl a, ±3.4 Pg C yr-1 for primary production, and ±0.3 Pg C yr-1 for export production and its contribution to CO2 fluxes. Our model results suggest that changes in ocean stratification driven by short-term climatic events could be used to understand and quantify the feedbacks from marine biology to CO2 and climate. Article in Journal/Newspaper Antarc* Antarctic North Atlantic North Atlantic oscillation University of East Anglia: UEA Digital Repository Antarctic The Antarctic Journal of Geophysical Research 108 C12 |
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Open Polar |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
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unknown |
description |
We investigate the propagation of climatic events on ocean stratification, marine biology, and CO2 using a large-scale ocean general circulation model coupled to a simple biogeochemical model of plankton dynamics and the carbon cycle. The model was forced with satellite and reanalysis fields during 1979-1999. We focus on three climatic events: (1) the North Atlantic Oscillation, (2) El Niño events, and (3) the Antarctic Circumpolar Wave. Such climatic events caused variability in ocean stratification, approximated by the mixing depth (MD), from ±20 m in the subtropics to ±100 s of meters at high latitudes. In the subtropics, deepening of the MD resupplied nutrient-impoverished surface waters and increased marine biomass by 20-100%. In contrast, at high latitudes, shoaling of the MD lengthened the growing season (i.e., the length of time that light is available for plankton growth) and increased marine biomass by 10-20%. Variability in marine biology reached global peak-to-peak values of ±0.01 mg m-3 for surface chl a, ±3.4 Pg C yr-1 for primary production, and ±0.3 Pg C yr-1 for export production and its contribution to CO2 fluxes. Our model results suggest that changes in ocean stratification driven by short-term climatic events could be used to understand and quantify the feedbacks from marine biology to CO2 and climate. |
format |
Article in Journal/Newspaper |
author |
Le Quéré, Corinne Aumont, Olivier Monfray, Patrick Orr, James |
spellingShingle |
Le Quéré, Corinne Aumont, Olivier Monfray, Patrick Orr, James Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period |
author_facet |
Le Quéré, Corinne Aumont, Olivier Monfray, Patrick Orr, James |
author_sort |
Le Quéré, Corinne |
title |
Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period |
title_short |
Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period |
title_full |
Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period |
title_fullStr |
Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period |
title_full_unstemmed |
Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period |
title_sort |
propagation of climatic events on ocean stratification, marine biology, and co2: case studies over the 1979–1999 period |
publishDate |
2003 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/32681/ https://doi.org/10.1029/2001JC000920 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic North Atlantic North Atlantic oscillation |
genre_facet |
Antarc* Antarctic North Atlantic North Atlantic oscillation |
op_relation |
Le Quéré, Corinne, Aumont, Olivier, Monfray, Patrick and Orr, James (2003) Propagation of climatic events on ocean stratification, marine biology, and CO2: Case studies over the 1979–1999 period. Journal of Geophysical Research, 108 (C12). ISSN 0148-0227 doi:10.1029/2001JC000920 |
op_doi |
https://doi.org/10.1029/2001JC000920 |
container_title |
Journal of Geophysical Research |
container_volume |
108 |
container_issue |
C12 |
_version_ |
1766261349566906368 |