First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics
International audience A statistical synthesis of marine aerosol measurements from experiments in four different oceans is used to evaluate a global aerosol microphysics model (GLOMAP). We compare the model against observed size resolved particle concentrations, probability distributions, and the te...
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ftinsu:oai:HAL:hal-00302118v1 2023-11-12T04:26:44+01:00 First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics Spracklen, D. V. Pringle, K. J. Carslaw, K. S. Mann, G. W. Manktelow, P. Heintzenberg, J. Institute for Atmospheric Science Leeds School of Earth and Environment Leeds (SEE) University of Leeds-University of Leeds Leibniz Institute for Tropospheric Research (TROPOS) 2006-09-21 https://hal.science/hal-00302118 https://hal.science/hal-00302118/document https://hal.science/hal-00302118/file/acpd-6-8871-2006.pdf en eng HAL CCSD European Geosciences Union hal-00302118 https://hal.science/hal-00302118 https://hal.science/hal-00302118/document https://hal.science/hal-00302118/file/acpd-6-8871-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00302118 Atmospheric Chemistry and Physics Discussions, 2006, 6 (5), pp.8871-8915 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftinsu 2023-10-25T16:26:45Z International audience A statistical synthesis of marine aerosol measurements from experiments in four different oceans is used to evaluate a global aerosol microphysics model (GLOMAP). We compare the model against observed size resolved particle concentrations, probability distributions, and the temporal persistence of different size particles. We attempt to explain the observed size distributions in terms of sulfate and sea spray and quantify the possible contributions of anthropogenic sulfate and carbonaceous material to the number and mass distribution. The model predicts a bimodal size distribution that agrees well with observations as a grand average over all regions, but there are large regional differences. Notably, observed Aitken mode number concentrations are more than a factor 10 higher than in the model for the N Atlantic but a factor 7 lower than the model in the NW Pacific. We also find that modelled Aitken mode and accumulation mode geometric mean diameters are generally smaller in the model by 10?30%. Comparison with observed free tropospheric Aitken mode distributions suggests that the model underpredicts growth of these particles during descent to the MBL. Recent observations of a substantial organic component of free tropospheric aerosol could explain this discrepancy. We find that anthropogenic continental material makes a substantial contribution to N Atlantic marine boundary layer (MBL) aerosol, with typically 60?90% of sulfate across the particle size range coming from anthropogenic sources, even if we analyse air that has spent an average of >120 h away from land. However, anthropogenic primary black carbon and organic carbon particles do not explain the large discrepancies in Aitken mode number. Several explanations for the discrepancy are suggested. The lack of lower atmospheric particle formation in the model may explain low N Atlantic particle concentrations. However, the observed and modelled particle persistence at Cape Grim in the Southern Ocean, does not reveal a diurnal ... Article in Journal/Newspaper Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Grim ENVELOPE(-64.486,-64.486,-65.379,-65.379) Pacific Southern Ocean |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Spracklen, D. V. Pringle, K. J. Carslaw, K. S. Mann, G. W. Manktelow, P. Heintzenberg, J. First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience A statistical synthesis of marine aerosol measurements from experiments in four different oceans is used to evaluate a global aerosol microphysics model (GLOMAP). We compare the model against observed size resolved particle concentrations, probability distributions, and the temporal persistence of different size particles. We attempt to explain the observed size distributions in terms of sulfate and sea spray and quantify the possible contributions of anthropogenic sulfate and carbonaceous material to the number and mass distribution. The model predicts a bimodal size distribution that agrees well with observations as a grand average over all regions, but there are large regional differences. Notably, observed Aitken mode number concentrations are more than a factor 10 higher than in the model for the N Atlantic but a factor 7 lower than the model in the NW Pacific. We also find that modelled Aitken mode and accumulation mode geometric mean diameters are generally smaller in the model by 10?30%. Comparison with observed free tropospheric Aitken mode distributions suggests that the model underpredicts growth of these particles during descent to the MBL. Recent observations of a substantial organic component of free tropospheric aerosol could explain this discrepancy. We find that anthropogenic continental material makes a substantial contribution to N Atlantic marine boundary layer (MBL) aerosol, with typically 60?90% of sulfate across the particle size range coming from anthropogenic sources, even if we analyse air that has spent an average of >120 h away from land. However, anthropogenic primary black carbon and organic carbon particles do not explain the large discrepancies in Aitken mode number. Several explanations for the discrepancy are suggested. The lack of lower atmospheric particle formation in the model may explain low N Atlantic particle concentrations. However, the observed and modelled particle persistence at Cape Grim in the Southern Ocean, does not reveal a diurnal ... |
author2 |
Institute for Atmospheric Science Leeds School of Earth and Environment Leeds (SEE) University of Leeds-University of Leeds Leibniz Institute for Tropospheric Research (TROPOS) |
format |
Article in Journal/Newspaper |
author |
Spracklen, D. V. Pringle, K. J. Carslaw, K. S. Mann, G. W. Manktelow, P. Heintzenberg, J. |
author_facet |
Spracklen, D. V. Pringle, K. J. Carslaw, K. S. Mann, G. W. Manktelow, P. Heintzenberg, J. |
author_sort |
Spracklen, D. V. |
title |
First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics |
title_short |
First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics |
title_full |
First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics |
title_fullStr |
First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics |
title_full_unstemmed |
First comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics |
title_sort |
first comparison of a global microphysical aerosol model with size-resolved observational aerosol statistics |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00302118 https://hal.science/hal-00302118/document https://hal.science/hal-00302118/file/acpd-6-8871-2006.pdf |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) ENVELOPE(-64.486,-64.486,-65.379,-65.379) |
geographic |
Aitken Grim Pacific Southern Ocean |
geographic_facet |
Aitken Grim Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00302118 Atmospheric Chemistry and Physics Discussions, 2006, 6 (5), pp.8871-8915 |
op_relation |
hal-00302118 https://hal.science/hal-00302118 https://hal.science/hal-00302118/document https://hal.science/hal-00302118/file/acpd-6-8871-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340601666076672 |