Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study
Atmospheric deposition is an important source of micronutrients to the ocean, but atmospheric deposition fluxes remain poorly constrained in most ocean regions due to the limited number of field observations of wet and dry atmospheric inputs. Here we present the distribution of dissolved aluminium (...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Gesellschaft Mbh
2019
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00491/60227/63598.pdf https://archimer.ifremer.fr/doc/00491/60227/63599.pdf https://archimer.ifremer.fr/doc/00491/60227/63600.pdf https://archimer.ifremer.fr/doc/00491/60227/63601.pdf https://doi.org/10.5194/bg-16-1525-2019 https://archimer.ifremer.fr/doc/00491/60227/ |
id |
ftarchimer:oai:archimer.ifremer.fr:60227 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:60227 2023-05-15T17:34:30+02:00 Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study Menzel Barraqueta, Jan-lukas Klar, Jessica K. Gledhill, Martha Schlosser, Christian Shelley, Rachel Planquette, Helene Wenzel, Bernhard Sarthou, Geraldine Achterberg, Eric P. 2019-04 application/pdf https://archimer.ifremer.fr/doc/00491/60227/63598.pdf https://archimer.ifremer.fr/doc/00491/60227/63599.pdf https://archimer.ifremer.fr/doc/00491/60227/63600.pdf https://archimer.ifremer.fr/doc/00491/60227/63601.pdf https://doi.org/10.5194/bg-16-1525-2019 https://archimer.ifremer.fr/doc/00491/60227/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00491/60227/63598.pdf https://archimer.ifremer.fr/doc/00491/60227/63599.pdf https://archimer.ifremer.fr/doc/00491/60227/63600.pdf https://archimer.ifremer.fr/doc/00491/60227/63601.pdf doi:10.5194/bg-16-1525-2019 https://archimer.ifremer.fr/doc/00491/60227/ info:eu-repo/semantics/openAccess restricted use Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2019-04 , Vol. 16 , N. 7 , P. 1525-1542 text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.5194/bg-16-1525-2019 2021-09-23T20:32:28Z Atmospheric deposition is an important source of micronutrients to the ocean, but atmospheric deposition fluxes remain poorly constrained in most ocean regions due to the limited number of field observations of wet and dry atmospheric inputs. Here we present the distribution of dissolved aluminium (dAl), as a tracer of atmospheric inputs, in surface waters of the Atlantic Ocean along GEOTRACES sections GA01, GA06, GA08, and GA10. We used the surface mixed-layer concentrations of dAl to calculate atmospheric deposition fluxes using a simple steady state model. We have optimized the Al fractional aerosol solubility, the dAl residence time within the surface mixed layer and the depth of the surface mixed layer for each separate cruise to calculate the atmospheric deposition fluxes. We calculated the lowest deposition fluxes of 0.15 +/- 0.1 and 0.27 +/- 0.13 gm(-2) yr(-1) for the South and North Atlantic Ocean (>40 degrees S and > 40 degrees N) respectively, and the highest fluxes of 1.8 and 3.09 gm(-2) yr(-1) for the south-east Atlantic and tropical Atlantic Ocean, respectively. Overall, our estimations are comparable to atmospheric dust deposition model estimates and reported field-based atmospheric deposition estimates. We note that our estimates diverge from atmospheric dust de-position model flux estimates in regions influenced by riverine Al inputs and in upwelling regions. As dAl is a key trace element in the GEOTRACES programme, the approach presented in this study allows calculations of atmospheric deposition fluxes at high spatial resolution for remote ocean regions. Article in Journal/Newspaper North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Biogeosciences 16 7 1525 1542 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Atmospheric deposition is an important source of micronutrients to the ocean, but atmospheric deposition fluxes remain poorly constrained in most ocean regions due to the limited number of field observations of wet and dry atmospheric inputs. Here we present the distribution of dissolved aluminium (dAl), as a tracer of atmospheric inputs, in surface waters of the Atlantic Ocean along GEOTRACES sections GA01, GA06, GA08, and GA10. We used the surface mixed-layer concentrations of dAl to calculate atmospheric deposition fluxes using a simple steady state model. We have optimized the Al fractional aerosol solubility, the dAl residence time within the surface mixed layer and the depth of the surface mixed layer for each separate cruise to calculate the atmospheric deposition fluxes. We calculated the lowest deposition fluxes of 0.15 +/- 0.1 and 0.27 +/- 0.13 gm(-2) yr(-1) for the South and North Atlantic Ocean (>40 degrees S and > 40 degrees N) respectively, and the highest fluxes of 1.8 and 3.09 gm(-2) yr(-1) for the south-east Atlantic and tropical Atlantic Ocean, respectively. Overall, our estimations are comparable to atmospheric dust deposition model estimates and reported field-based atmospheric deposition estimates. We note that our estimates diverge from atmospheric dust de-position model flux estimates in regions influenced by riverine Al inputs and in upwelling regions. As dAl is a key trace element in the GEOTRACES programme, the approach presented in this study allows calculations of atmospheric deposition fluxes at high spatial resolution for remote ocean regions. |
format |
Article in Journal/Newspaper |
author |
Menzel Barraqueta, Jan-lukas Klar, Jessica K. Gledhill, Martha Schlosser, Christian Shelley, Rachel Planquette, Helene Wenzel, Bernhard Sarthou, Geraldine Achterberg, Eric P. |
spellingShingle |
Menzel Barraqueta, Jan-lukas Klar, Jessica K. Gledhill, Martha Schlosser, Christian Shelley, Rachel Planquette, Helene Wenzel, Bernhard Sarthou, Geraldine Achterberg, Eric P. Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study |
author_facet |
Menzel Barraqueta, Jan-lukas Klar, Jessica K. Gledhill, Martha Schlosser, Christian Shelley, Rachel Planquette, Helene Wenzel, Bernhard Sarthou, Geraldine Achterberg, Eric P. |
author_sort |
Menzel Barraqueta, Jan-lukas |
title |
Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study |
title_short |
Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study |
title_full |
Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study |
title_fullStr |
Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study |
title_full_unstemmed |
Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study |
title_sort |
atmospheric deposition fluxes over the atlantic ocean: a geotraces case study |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00491/60227/63598.pdf https://archimer.ifremer.fr/doc/00491/60227/63599.pdf https://archimer.ifremer.fr/doc/00491/60227/63600.pdf https://archimer.ifremer.fr/doc/00491/60227/63601.pdf https://doi.org/10.5194/bg-16-1525-2019 https://archimer.ifremer.fr/doc/00491/60227/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2019-04 , Vol. 16 , N. 7 , P. 1525-1542 |
op_relation |
https://archimer.ifremer.fr/doc/00491/60227/63598.pdf https://archimer.ifremer.fr/doc/00491/60227/63599.pdf https://archimer.ifremer.fr/doc/00491/60227/63600.pdf https://archimer.ifremer.fr/doc/00491/60227/63601.pdf doi:10.5194/bg-16-1525-2019 https://archimer.ifremer.fr/doc/00491/60227/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.5194/bg-16-1525-2019 |
container_title |
Biogeosciences |
container_volume |
16 |
container_issue |
7 |
container_start_page |
1525 |
op_container_end_page |
1542 |
_version_ |
1766133362717622272 |