Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe
International audience Dust emitted from North Africa is transported over long distances and has a strong impact on large areas over the North Tropical Atlantic Ocean. Sea salt emitted by the sea surface is the second source of essential elements transported in the atmosphere and plays a major role...
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ftunivnantes:oai:HAL:hal-03944911v1 2023-05-15T17:35:17+02:00 Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe Xu-Yang, Yangjunjie Dessert, Céline Losno, Rémi Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France (IPGP) EC2CO (CNRS-INSU) support with grant “SAHAFRAN” 2022-11-03 https://hal-cnrs.archives-ouvertes.fr/hal-03944911 https://doi.org/10.1029/2022JD037175 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2022JD037175 hal-03944911 https://hal-cnrs.archives-ouvertes.fr/hal-03944911 doi:10.1029/2022JD037175 ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal-cnrs.archives-ouvertes.fr/hal-03944911 Journal of Geophysical Research: Atmospheres, 2022, 127 (22), ⟨10.1029/2022JD037175⟩ Atmospheric deposition Island Saharan dust input Sea salt aerosol [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [CHIM.ANAL]Chemical Sciences/Analytical chemistry [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1029/2022JD037175 2023-01-24T23:55:14Z International audience Dust emitted from North Africa is transported over long distances and has a strong impact on large areas over the North Tropical Atlantic Ocean. Sea salt emitted by the sea surface is the second source of essential elements transported in the atmosphere and plays a major role in the cycles of alkaline-earth metals in the ecosystems of tropical North Atlantic Islands. The total atmospheric deposition fluxes were continuously sampled on a weekly basis in Guadeloupe, Lesser Antilles, from March 2015 to August 2018 (41 months). Elemental deposition fluxes, including Al, Ca, K, Mg, Fe, Na, P, S, and Zn, were measured for all samples to provide the first long time series of atmospheric elemental deposition fluxes over the Lesser Antilles region. It is shown that: (a) the three sources of atmospheric deposits in Guadeloupe for the presented elements are sea salt (for K, Ca, Mg, Na, and S), long-range transported Saharan dust (for Al, Ca, K, and Fe), and biogenic particles (for P and Zn); (b) the average deposition mass fluxes of sea salt and Saharan dust are 17.4 and 11.2 g.m−2.year−1, respectively, without noticeable inter-annual variations; (c) a pronounced seasonality is found for the Saharan dust deposition, for which maximum flux values are observed between June and July each year and 85% of the annual deposition flux occurs between April and September; (d) the deposition flux of sea salt is strongly correlated to local wind speed, without seasonality. Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Journal of Geophysical Research: Atmospheres 127 22 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Atmospheric deposition Island Saharan dust input Sea salt aerosol [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [CHIM.ANAL]Chemical Sciences/Analytical chemistry [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
Atmospheric deposition Island Saharan dust input Sea salt aerosol [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [CHIM.ANAL]Chemical Sciences/Analytical chemistry [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Xu-Yang, Yangjunjie Dessert, Céline Losno, Rémi Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe |
topic_facet |
Atmospheric deposition Island Saharan dust input Sea salt aerosol [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [CHIM.ANAL]Chemical Sciences/Analytical chemistry [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience Dust emitted from North Africa is transported over long distances and has a strong impact on large areas over the North Tropical Atlantic Ocean. Sea salt emitted by the sea surface is the second source of essential elements transported in the atmosphere and plays a major role in the cycles of alkaline-earth metals in the ecosystems of tropical North Atlantic Islands. The total atmospheric deposition fluxes were continuously sampled on a weekly basis in Guadeloupe, Lesser Antilles, from March 2015 to August 2018 (41 months). Elemental deposition fluxes, including Al, Ca, K, Mg, Fe, Na, P, S, and Zn, were measured for all samples to provide the first long time series of atmospheric elemental deposition fluxes over the Lesser Antilles region. It is shown that: (a) the three sources of atmospheric deposits in Guadeloupe for the presented elements are sea salt (for K, Ca, Mg, Na, and S), long-range transported Saharan dust (for Al, Ca, K, and Fe), and biogenic particles (for P and Zn); (b) the average deposition mass fluxes of sea salt and Saharan dust are 17.4 and 11.2 g.m−2.year−1, respectively, without noticeable inter-annual variations; (c) a pronounced seasonality is found for the Saharan dust deposition, for which maximum flux values are observed between June and July each year and 85% of the annual deposition flux occurs between April and September; (d) the deposition flux of sea salt is strongly correlated to local wind speed, without seasonality. |
author2 |
Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France (IPGP) EC2CO (CNRS-INSU) support with grant “SAHAFRAN” |
format |
Article in Journal/Newspaper |
author |
Xu-Yang, Yangjunjie Dessert, Céline Losno, Rémi |
author_facet |
Xu-Yang, Yangjunjie Dessert, Céline Losno, Rémi |
author_sort |
Xu-Yang, Yangjunjie |
title |
Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe |
title_short |
Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe |
title_full |
Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe |
title_fullStr |
Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe |
title_full_unstemmed |
Atmospheric Deposition Over the Caribbean Region: Sea Salt and Saharan Dust Are Sources of Essential Elements on the Island of Guadeloupe |
title_sort |
atmospheric deposition over the caribbean region: sea salt and saharan dust are sources of essential elements on the island of guadeloupe |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-cnrs.archives-ouvertes.fr/hal-03944911 https://doi.org/10.1029/2022JD037175 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal-cnrs.archives-ouvertes.fr/hal-03944911 Journal of Geophysical Research: Atmospheres, 2022, 127 (22), ⟨10.1029/2022JD037175⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022JD037175 hal-03944911 https://hal-cnrs.archives-ouvertes.fr/hal-03944911 doi:10.1029/2022JD037175 |
op_doi |
https://doi.org/10.1029/2022JD037175 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
127 |
container_issue |
22 |
_version_ |
1766134391806885888 |