Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean
234Th-derived carbon export fluxes were measured in the Atlantic Ocean under the GEOTRACES framework to evaluate basin-scale export variability. Here, we present the results from the northern half of the GA02 transect, spanning from the equator to 64°N. As a result of limited site-specific C/234Th r...
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ftunivtasmania:oai:eprints.utas.edu.au:26452 2023-05-15T17:35:47+02:00 Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean Puigcorbe, V Roca-Marti, M Masque, P Benitez-Nelson, C van der Loeff, MR Bracher, A Moreau, S 2017 https://eprints.utas.edu.au/26452/ unknown Pergamon-Elsevier Science Ltd Puigcorbe, V, Roca-Marti, M, Masque, P, Benitez-Nelson, C, van der Loeff, MR, Bracher, A and Moreau, S orcid:0000-0001-9446-812X 2017 , 'Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean' , Deep-Sea Research. Part 1, vol. 129 , pp. 116-130 , doi:10.1016/j.dsr.2017.08.016 <http://dx.doi.org/10.1016/j.dsr.2017.08.016>. GEOTRACES particulate organic carbon export North Atlantic thorium satellite-derived export models Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1016/j.dsr.2017.08.016 2021-09-06T22:17:55Z 234Th-derived carbon export fluxes were measured in the Atlantic Ocean under the GEOTRACES framework to evaluate basin-scale export variability. Here, we present the results from the northern half of the GA02 transect, spanning from the equator to 64°N. As a result of limited site-specific C/234Th ratio measurements, we further combined our data with previous work to develop a basin wide C/234Th ratio depth curve. While the magnitude of organic carbon fluxes varied depending on the C/234Th ratio used, latitudinal trends were similar, with sizeable and variable organic carbon export fluxes occurring at high latitudes and low to negligible fluxes occurring in oligotrophic waters. Our results agree with previous studies, except at the boundaries between domains, where fluxes were relatively enhanced.Three different models were used to obtain satellite-derived net primary production (NPP). In general, NPP estimates had similar trends along the transect, but there were significant differences in the absolute magnitude depending on the model used. Nevertheless, organic carbon export efficiencies were generally 234Th-derived carbon exports fluxes. D05 and L11 provided estimates closest to values obtained with the 234Th approach (within a 3-fold difference), but with no clear trends. The H11 model, on the other hand, consistently provided lower export estimates.The large increase in export data in the Atlantic Ocean derived from the GEOTRACES Program, combined with satellite observations and modeling efforts continue to improve the estimates of carbon export in this ocean basin and therefore reduce uncertainty in the global carbon budget. However, our results also suggest that tuning export models and including biological parameters at a regional scale is necessary for improving satellite-modeling efforts and providing export estimates that are more representative of in situ observations. Article in Journal/Newspaper North Atlantic University of Tasmania: UTas ePrints Deep Sea Research Part I: Oceanographic Research Papers 129 116 130 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
unknown |
topic |
GEOTRACES particulate organic carbon export North Atlantic thorium satellite-derived export models |
spellingShingle |
GEOTRACES particulate organic carbon export North Atlantic thorium satellite-derived export models Puigcorbe, V Roca-Marti, M Masque, P Benitez-Nelson, C van der Loeff, MR Bracher, A Moreau, S Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean |
topic_facet |
GEOTRACES particulate organic carbon export North Atlantic thorium satellite-derived export models |
description |
234Th-derived carbon export fluxes were measured in the Atlantic Ocean under the GEOTRACES framework to evaluate basin-scale export variability. Here, we present the results from the northern half of the GA02 transect, spanning from the equator to 64°N. As a result of limited site-specific C/234Th ratio measurements, we further combined our data with previous work to develop a basin wide C/234Th ratio depth curve. While the magnitude of organic carbon fluxes varied depending on the C/234Th ratio used, latitudinal trends were similar, with sizeable and variable organic carbon export fluxes occurring at high latitudes and low to negligible fluxes occurring in oligotrophic waters. Our results agree with previous studies, except at the boundaries between domains, where fluxes were relatively enhanced.Three different models were used to obtain satellite-derived net primary production (NPP). In general, NPP estimates had similar trends along the transect, but there were significant differences in the absolute magnitude depending on the model used. Nevertheless, organic carbon export efficiencies were generally 234Th-derived carbon exports fluxes. D05 and L11 provided estimates closest to values obtained with the 234Th approach (within a 3-fold difference), but with no clear trends. The H11 model, on the other hand, consistently provided lower export estimates.The large increase in export data in the Atlantic Ocean derived from the GEOTRACES Program, combined with satellite observations and modeling efforts continue to improve the estimates of carbon export in this ocean basin and therefore reduce uncertainty in the global carbon budget. However, our results also suggest that tuning export models and including biological parameters at a regional scale is necessary for improving satellite-modeling efforts and providing export estimates that are more representative of in situ observations. |
format |
Article in Journal/Newspaper |
author |
Puigcorbe, V Roca-Marti, M Masque, P Benitez-Nelson, C van der Loeff, MR Bracher, A Moreau, S |
author_facet |
Puigcorbe, V Roca-Marti, M Masque, P Benitez-Nelson, C van der Loeff, MR Bracher, A Moreau, S |
author_sort |
Puigcorbe, V |
title |
Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean |
title_short |
Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean |
title_full |
Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean |
title_fullStr |
Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean |
title_full_unstemmed |
Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean |
title_sort |
latitudinal distributions of particulate carbon export across the north western atlantic ocean |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/26452/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Puigcorbe, V, Roca-Marti, M, Masque, P, Benitez-Nelson, C, van der Loeff, MR, Bracher, A and Moreau, S orcid:0000-0001-9446-812X 2017 , 'Latitudinal distributions of particulate carbon export across the North Western Atlantic Ocean' , Deep-Sea Research. Part 1, vol. 129 , pp. 116-130 , doi:10.1016/j.dsr.2017.08.016 <http://dx.doi.org/10.1016/j.dsr.2017.08.016>. |
op_doi |
https://doi.org/10.1016/j.dsr.2017.08.016 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
129 |
container_start_page |
116 |
op_container_end_page |
130 |
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1766135047158497280 |