Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study
International audience The effect of ocean acidification and changing water conditions on primary (and secondary) marine aerosol emissions is not well understood on a regional or a global scale. To investigate this effect as well as the indirect effect on aerosol that changing biogeochemical paramet...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Online Access: | https://hal.sorbonne-universite.fr/hal-01206664 https://hal.sorbonne-universite.fr/hal-01206664/document https://hal.sorbonne-universite.fr/hal-01206664/file/acp-15-7961-2015.pdf https://doi.org/10.5194/acp-15-7961-2015 |
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Université de Nantes: HAL-UNIV-NANTES |
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English |
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ChArMEx [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
ChArMEx [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Schwier, A. N. Rose, C. Asmi, E. Ebling, A. M. Landing, W. M. Marro, S. Pedrotti, M.-L. Sallon, A. Iuculano, F. Agusti, S. Tsiola, A. Pitta, P. Louis, J. Guieu, Cecile Gazeau, Frédéric Sellegri, K. Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study |
topic_facet |
ChArMEx [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The effect of ocean acidification and changing water conditions on primary (and secondary) marine aerosol emissions is not well understood on a regional or a global scale. To investigate this effect as well as the indirect effect on aerosol that changing biogeochemical parameters can have, ~ 52 m3 pelagic mesocosms were deployed for several weeks in the Mediterranean Sea during both winter pre-bloom and summer oligotrophic conditions and were subjected to various levels of CO2 to simulate the conditions foreseen in this region for the coming decades. After seawater sampling, primary bubble-bursting aerosol experiments were performed using a plunging water jet system to test both chemical and physical aerosol parameters (10–400 nm). Comparing results obtained during pre-bloom and oligotrophic conditions, we find the same four log-normal modal diameters (18.5 ± 0.6, 37.5 ± 1.4, 91.5 ± 2.0, 260 ± 3.2 nm) describing the aerosol size distribution during both campaigns, yet pre-bloom conditions significantly increased the number fraction of the second (Aitken) mode, with an amplitude correlated to virus-like particles, heterotrophic prokaryotes, TEPs (transparent exopolymeric particles), chlorophyll a and other pigments. Organic fractions determined from kappa closure calculations for the diameter, Dp ~ 50 nm, were much larger during the pre-bloom period (64 %) than during the oligotrophic period (38 %), and the organic fraction decreased as the particle size increased. Combining data from both campaigns together, strong positive correlations were found between the organic fraction of the aerosol and chlorophyll a concentrations, heterotrophic and autotrophic bacteria abundance, and dissolved organic carbon (DOC) concentrations. As a consequence of the changes in the organic fraction and the size distributions between pre-bloom and oligotrophic periods, we find that the ratio of cloud condensation nuclei (CCN) to condensation nuclei (CN) slightly decreased during the pre-bloom period. The ... |
author2 |
Laboratoire de météorologie physique (LaMP) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Earth, Ocean and Atmospheric Science Tallahassee (FSU Florida State University Tallahassee (FSU) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Instituto Mediterráneo de Estudios Avanzados The University of Western Australia (UWA) Hellenic Centre for Marine Research (HCMR) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Schwier, A. N. Rose, C. Asmi, E. Ebling, A. M. Landing, W. M. Marro, S. Pedrotti, M.-L. Sallon, A. Iuculano, F. Agusti, S. Tsiola, A. Pitta, P. Louis, J. Guieu, Cecile Gazeau, Frédéric Sellegri, K. |
author_facet |
Schwier, A. N. Rose, C. Asmi, E. Ebling, A. M. Landing, W. M. Marro, S. Pedrotti, M.-L. Sallon, A. Iuculano, F. Agusti, S. Tsiola, A. Pitta, P. Louis, J. Guieu, Cecile Gazeau, Frédéric Sellegri, K. |
author_sort |
Schwier, A. N. |
title |
Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study |
title_short |
Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study |
title_full |
Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study |
title_fullStr |
Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study |
title_full_unstemmed |
Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study |
title_sort |
primary marine aerosol emissions from the mediterranean sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01206664 https://hal.sorbonne-universite.fr/hal-01206664/document https://hal.sorbonne-universite.fr/hal-01206664/file/acp-15-7961-2015.pdf https://doi.org/10.5194/acp-15-7961-2015 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken |
geographic_facet |
Aitken |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.sorbonne-universite.fr/hal-01206664 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2015, 15 (14), pp.7961-7976. ⟨10.5194/acp-15-7961-2015⟩ |
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http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-15-7961-2015 |
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Atmospheric Chemistry and Physics |
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15 |
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14 |
container_start_page |
7961 |
op_container_end_page |
7976 |
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ftunivnantes:oai:HAL:hal-01206664v1 2023-05-15T17:51:54+02:00 Primary marine aerosol emissions from the Mediterranean Sea during pre-bloom and oligotrophic conditions: correlations to seawater chlorophyll a from a mesocosm study Schwier, A. N. Rose, C. Asmi, E. Ebling, A. M. Landing, W. M. Marro, S. Pedrotti, M.-L. Sallon, A. Iuculano, F. Agusti, S. Tsiola, A. Pitta, P. Louis, J. Guieu, Cecile Gazeau, Frédéric Sellegri, K. Laboratoire de météorologie physique (LaMP) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Earth, Ocean and Atmospheric Science Tallahassee (FSU Florida State University Tallahassee (FSU) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Instituto Mediterráneo de Estudios Avanzados The University of Western Australia (UWA) Hellenic Centre for Marine Research (HCMR) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2015 https://hal.sorbonne-universite.fr/hal-01206664 https://hal.sorbonne-universite.fr/hal-01206664/document https://hal.sorbonne-universite.fr/hal-01206664/file/acp-15-7961-2015.pdf https://doi.org/10.5194/acp-15-7961-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-15-7961-2015 hal-01206664 https://hal.sorbonne-universite.fr/hal-01206664 https://hal.sorbonne-universite.fr/hal-01206664/document https://hal.sorbonne-universite.fr/hal-01206664/file/acp-15-7961-2015.pdf doi:10.5194/acp-15-7961-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.sorbonne-universite.fr/hal-01206664 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2015, 15 (14), pp.7961-7976. ⟨10.5194/acp-15-7961-2015⟩ ChArMEx [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.5194/acp-15-7961-2015 2022-10-12T00:03:10Z International audience The effect of ocean acidification and changing water conditions on primary (and secondary) marine aerosol emissions is not well understood on a regional or a global scale. To investigate this effect as well as the indirect effect on aerosol that changing biogeochemical parameters can have, ~ 52 m3 pelagic mesocosms were deployed for several weeks in the Mediterranean Sea during both winter pre-bloom and summer oligotrophic conditions and were subjected to various levels of CO2 to simulate the conditions foreseen in this region for the coming decades. After seawater sampling, primary bubble-bursting aerosol experiments were performed using a plunging water jet system to test both chemical and physical aerosol parameters (10–400 nm). Comparing results obtained during pre-bloom and oligotrophic conditions, we find the same four log-normal modal diameters (18.5 ± 0.6, 37.5 ± 1.4, 91.5 ± 2.0, 260 ± 3.2 nm) describing the aerosol size distribution during both campaigns, yet pre-bloom conditions significantly increased the number fraction of the second (Aitken) mode, with an amplitude correlated to virus-like particles, heterotrophic prokaryotes, TEPs (transparent exopolymeric particles), chlorophyll a and other pigments. Organic fractions determined from kappa closure calculations for the diameter, Dp ~ 50 nm, were much larger during the pre-bloom period (64 %) than during the oligotrophic period (38 %), and the organic fraction decreased as the particle size increased. Combining data from both campaigns together, strong positive correlations were found between the organic fraction of the aerosol and chlorophyll a concentrations, heterotrophic and autotrophic bacteria abundance, and dissolved organic carbon (DOC) concentrations. As a consequence of the changes in the organic fraction and the size distributions between pre-bloom and oligotrophic periods, we find that the ratio of cloud condensation nuclei (CCN) to condensation nuclei (CN) slightly decreased during the pre-bloom period. The ... Article in Journal/Newspaper Ocean acidification Université de Nantes: HAL-UNIV-NANTES Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Atmospheric Chemistry and Physics 15 14 7961 7976 |