Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations
Ice-nucleating particles (INPs) are known to affect the amount of ice in mixed-phase clouds, thereby influencing many of their properties. The atmospheric INP concentration changes by orders of magnitude from terrestrial to marine environments, which typically contain much lower concentrations. Many...
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ftdoajarticles:oai:doaj.org/article:ae6d66b89511476c8e31a9d31253d71c 2023-05-15T18:25:51+02:00 Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations J. Vergara-Temprado B. J. Murray T. W. Wilson D. O'Sullivan J. Browse K. J. Pringle K. Ardon-Dryer A. K. Bertram S. M. Burrows D. Ceburnis P. J. DeMott R. H. Mason C. D. O'Dowd M. Rinaldi K. S. Carslaw 2017-03-01T00:00:00Z https://doi.org/10.5194/acp-17-3637-2017 https://doaj.org/article/ae6d66b89511476c8e31a9d31253d71c EN eng Copernicus Publications http://www.atmos-chem-phys.net/17/3637/2017/acp-17-3637-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-17-3637-2017 https://doaj.org/article/ae6d66b89511476c8e31a9d31253d71c Atmospheric Chemistry and Physics, Vol 17, Iss 5, Pp 3637-3658 (2017) Physics QC1-999 Chemistry QD1-999 article 2017 ftdoajarticles https://doi.org/10.5194/acp-17-3637-2017 2022-12-31T07:18:55Z Ice-nucleating particles (INPs) are known to affect the amount of ice in mixed-phase clouds, thereby influencing many of their properties. The atmospheric INP concentration changes by orders of magnitude from terrestrial to marine environments, which typically contain much lower concentrations. Many modelling studies use parameterizations for heterogeneous ice nucleation and cloud ice processes that do not account for this difference because they were developed based on INP measurements made predominantly in terrestrial environments without considering the aerosol composition. Errors in the assumed INP concentration will influence the simulated amount of ice in mixed-phase clouds, leading to errors in top-of-atmosphere radiative flux and ultimately the climate sensitivity of the model. Here we develop a global model of INP concentrations relevant for mixed-phase clouds based on laboratory and field measurements of ice nucleation by K-feldspar (an ice-active component of desert dust) and marine organic aerosols (from sea spray). The simulated global distribution of INP concentrations based on these two species agrees much better with currently available ambient measurements than when INP concentrations are assumed to depend only on temperature or particle size. Underestimation of INP concentrations in some terrestrial locations may be due to the neglect of INPs from other terrestrial sources. Our model indicates that, on a monthly average basis, desert dusts dominate the contribution to the INP population over much of the world, but marine organics become increasingly important over remote oceans and they dominate over the Southern Ocean. However, day-to-day variability is important. Because desert dust aerosol tends to be sporadic, marine organic aerosols dominate the INP population on many days per month over much of the mid- and high-latitude Northern Hemisphere. This study advances our understanding of which aerosol species need to be included in order to adequately describe the global and regional ... Article in Journal/Newspaper Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Atmospheric Chemistry and Physics 17 5 3637 3658 |
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English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 J. Vergara-Temprado B. J. Murray T. W. Wilson D. O'Sullivan J. Browse K. J. Pringle K. Ardon-Dryer A. K. Bertram S. M. Burrows D. Ceburnis P. J. DeMott R. H. Mason C. D. O'Dowd M. Rinaldi K. S. Carslaw Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Ice-nucleating particles (INPs) are known to affect the amount of ice in mixed-phase clouds, thereby influencing many of their properties. The atmospheric INP concentration changes by orders of magnitude from terrestrial to marine environments, which typically contain much lower concentrations. Many modelling studies use parameterizations for heterogeneous ice nucleation and cloud ice processes that do not account for this difference because they were developed based on INP measurements made predominantly in terrestrial environments without considering the aerosol composition. Errors in the assumed INP concentration will influence the simulated amount of ice in mixed-phase clouds, leading to errors in top-of-atmosphere radiative flux and ultimately the climate sensitivity of the model. Here we develop a global model of INP concentrations relevant for mixed-phase clouds based on laboratory and field measurements of ice nucleation by K-feldspar (an ice-active component of desert dust) and marine organic aerosols (from sea spray). The simulated global distribution of INP concentrations based on these two species agrees much better with currently available ambient measurements than when INP concentrations are assumed to depend only on temperature or particle size. Underestimation of INP concentrations in some terrestrial locations may be due to the neglect of INPs from other terrestrial sources. Our model indicates that, on a monthly average basis, desert dusts dominate the contribution to the INP population over much of the world, but marine organics become increasingly important over remote oceans and they dominate over the Southern Ocean. However, day-to-day variability is important. Because desert dust aerosol tends to be sporadic, marine organic aerosols dominate the INP population on many days per month over much of the mid- and high-latitude Northern Hemisphere. This study advances our understanding of which aerosol species need to be included in order to adequately describe the global and regional ... |
format |
Article in Journal/Newspaper |
author |
J. Vergara-Temprado B. J. Murray T. W. Wilson D. O'Sullivan J. Browse K. J. Pringle K. Ardon-Dryer A. K. Bertram S. M. Burrows D. Ceburnis P. J. DeMott R. H. Mason C. D. O'Dowd M. Rinaldi K. S. Carslaw |
author_facet |
J. Vergara-Temprado B. J. Murray T. W. Wilson D. O'Sullivan J. Browse K. J. Pringle K. Ardon-Dryer A. K. Bertram S. M. Burrows D. Ceburnis P. J. DeMott R. H. Mason C. D. O'Dowd M. Rinaldi K. S. Carslaw |
author_sort |
J. Vergara-Temprado |
title |
Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations |
title_short |
Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations |
title_full |
Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations |
title_fullStr |
Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations |
title_full_unstemmed |
Contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations |
title_sort |
contribution of feldspar and marine organic aerosols to global ice nucleating particle concentrations |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/acp-17-3637-2017 https://doaj.org/article/ae6d66b89511476c8e31a9d31253d71c |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Atmospheric Chemistry and Physics, Vol 17, Iss 5, Pp 3637-3658 (2017) |
op_relation |
http://www.atmos-chem-phys.net/17/3637/2017/acp-17-3637-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-17-3637-2017 https://doaj.org/article/ae6d66b89511476c8e31a9d31253d71c |
op_doi |
https://doi.org/10.5194/acp-17-3637-2017 |
container_title |
Atmospheric Chemistry and Physics |
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17 |
container_issue |
5 |
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3637 |
op_container_end_page |
3658 |
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