Saharan dust inputs to western North Atlantic Ocean with three years time series
International audience North Africa is the largest dust source area in the world, accounting for 55% of global continental dust emission [1]. These dust can be transported over long distance and have an environmental impact on ocean after deposition through biogeochemical processes [2], they are als...
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ftsorbonneuniv:oai:HAL:hal-02331827v1 2023-10-09T21:53:56+02:00 Saharan dust inputs to western North Atlantic Ocean with three years time series Xu, Y. Losno, R. Dessert, C. Monna, F. Robert, V. Chane-Teng, J Boye, Marie Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Université de Bourgogne (UB) Washington DC, United States 2018-12-10 https://hal.science/hal-02331827 en eng HAL CCSD hal-02331827 https://hal.science/hal-02331827 AGU https://hal.science/hal-02331827 AGU, Dec 2018, Washington DC, United States [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2018 ftsorbonneuniv 2023-09-12T22:48:30Z International audience North Africa is the largest dust source area in the world, accounting for 55% of global continental dust emission [1]. These dust can be transported over long distance and have an environmental impact on ocean after deposition through biogeochemical processes [2], they are also important nutrition source for North Tropical Atlantic Islands [3]. Since three years, atmospheric deposition is continuously sampled and analyzed for elemental composition on a weekly basis at the Observatoire Volcanologique et Sismologique de Guadeloupe (OVSG-IPGP, 15°58'50" N, 61°42'13" W) situated in the Western North Atlantic Ocean and an average deposition flux of 10 g/m2 /year is measured at La Guadeloupe Island. A strong seasonality is observed on the flux of elements of crustal origin such as as Fe with the largest flux observed between April and September. The seasonality and annual variations of the deposition composition on major, minor and traces including rare earth elements are studied and it turns out that: (i) deposition samples collected during the summer months have a major element composition close to crust, (ii) samples collected during the winter months are dominated by sea salt. (iii) rare earth elements exhibit a stable profile during the whole year. (iv) interannual variation of composition is observed between samples for both major and traces. This study will help us to better understand the Saharan dust impact on the Caribbean basin. Conference Object North Atlantic HAL Sorbonne Université |
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HAL Sorbonne Université |
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ftsorbonneuniv |
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English |
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[SDE]Environmental Sciences |
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[SDE]Environmental Sciences Xu, Y. Losno, R. Dessert, C. Monna, F. Robert, V. Chane-Teng, J Boye, Marie Saharan dust inputs to western North Atlantic Ocean with three years time series |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience North Africa is the largest dust source area in the world, accounting for 55% of global continental dust emission [1]. These dust can be transported over long distance and have an environmental impact on ocean after deposition through biogeochemical processes [2], they are also important nutrition source for North Tropical Atlantic Islands [3]. Since three years, atmospheric deposition is continuously sampled and analyzed for elemental composition on a weekly basis at the Observatoire Volcanologique et Sismologique de Guadeloupe (OVSG-IPGP, 15°58'50" N, 61°42'13" W) situated in the Western North Atlantic Ocean and an average deposition flux of 10 g/m2 /year is measured at La Guadeloupe Island. A strong seasonality is observed on the flux of elements of crustal origin such as as Fe with the largest flux observed between April and September. The seasonality and annual variations of the deposition composition on major, minor and traces including rare earth elements are studied and it turns out that: (i) deposition samples collected during the summer months have a major element composition close to crust, (ii) samples collected during the winter months are dominated by sea salt. (iii) rare earth elements exhibit a stable profile during the whole year. (iv) interannual variation of composition is observed between samples for both major and traces. This study will help us to better understand the Saharan dust impact on the Caribbean basin. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Université de Bourgogne (UB) |
format |
Conference Object |
author |
Xu, Y. Losno, R. Dessert, C. Monna, F. Robert, V. Chane-Teng, J Boye, Marie |
author_facet |
Xu, Y. Losno, R. Dessert, C. Monna, F. Robert, V. Chane-Teng, J Boye, Marie |
author_sort |
Xu, Y. |
title |
Saharan dust inputs to western North Atlantic Ocean with three years time series |
title_short |
Saharan dust inputs to western North Atlantic Ocean with three years time series |
title_full |
Saharan dust inputs to western North Atlantic Ocean with three years time series |
title_fullStr |
Saharan dust inputs to western North Atlantic Ocean with three years time series |
title_full_unstemmed |
Saharan dust inputs to western North Atlantic Ocean with three years time series |
title_sort |
saharan dust inputs to western north atlantic ocean with three years time series |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02331827 |
op_coverage |
Washington DC, United States |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
AGU https://hal.science/hal-02331827 AGU, Dec 2018, Washington DC, United States |
op_relation |
hal-02331827 https://hal.science/hal-02331827 |
_version_ |
1779317313077510144 |