Ion-mediated nucleation as an important global source of tropospheric aerosols
Aerosol nucleation events have been observed at a variety of locations worldwide, and may have significant climatic and health implications. While ions have long been suggested as favorable nucleation embryos, their significance as a global source of particles has remained uncertain. Here, an ion-me...
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ftdoajarticles:oai:doaj.org/article:889ac26cae0e4943b19b1fb0a170331a 2023-05-15T14:01:58+02:00 Ion-mediated nucleation as an important global source of tropospheric aerosols F. Yu Z. Wang G. Luo R. Turco 2008-05-01T00:00:00Z https://doaj.org/article/889ac26cae0e4943b19b1fb0a170331a EN eng Copernicus Publications http://www.atmos-chem-phys.net/8/2537/2008/acp-8-2537-2008.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/889ac26cae0e4943b19b1fb0a170331a Atmospheric Chemistry and Physics, Vol 8, Iss 9, Pp 2537-2554 (2008) Physics QC1-999 Chemistry QD1-999 article 2008 ftdoajarticles 2022-12-31T01:58:54Z Aerosol nucleation events have been observed at a variety of locations worldwide, and may have significant climatic and health implications. While ions have long been suggested as favorable nucleation embryos, their significance as a global source of particles has remained uncertain. Here, an ion-mediated nucleation (IMN) mechanism, which incorporates new thermodynamic data and physical algorithms, has been integrated into a global chemical transport model (GEOS-Chem) to study ion-mediated particle formation in the global troposphere. The simulated annual mean results have been compared to a comprehensive set of data relevant to particle nucleation around the globe. We show that predicted annual spatial patterns of particle formation agree reasonably well with land-, ship-, and aircraft-based observations. Our simulations show that, globally, IMN in the boundary layer is largely confined to two broad latitude belts: one in the northern hemisphere (~20° N–70° N), and one in the southern hemisphere (~30° S–90° S). In the middle latitude boundary layer over continents, the annual mean IMN rates are generally above 10 4 cm −3 day −1 , with some hot spots reaching 10 5 cm −3 day −1 . The zonally-averaged vertical distribution of IMN rates indicates that IMN is significant in the tropical upper troposphere, the entire middle latitude troposphere, and over Antarctica. Comparing the relative strengths of particle sources due to IMN and due to primary particle emissions demonstrates that IMN is significant on a global scale. Further research is needed to reduce modeling uncertainties and to understand the ultimate contribution of freshly nucleated particles to the abundance of cloud condensation nuclei. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 F. Yu Z. Wang G. Luo R. Turco Ion-mediated nucleation as an important global source of tropospheric aerosols |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Aerosol nucleation events have been observed at a variety of locations worldwide, and may have significant climatic and health implications. While ions have long been suggested as favorable nucleation embryos, their significance as a global source of particles has remained uncertain. Here, an ion-mediated nucleation (IMN) mechanism, which incorporates new thermodynamic data and physical algorithms, has been integrated into a global chemical transport model (GEOS-Chem) to study ion-mediated particle formation in the global troposphere. The simulated annual mean results have been compared to a comprehensive set of data relevant to particle nucleation around the globe. We show that predicted annual spatial patterns of particle formation agree reasonably well with land-, ship-, and aircraft-based observations. Our simulations show that, globally, IMN in the boundary layer is largely confined to two broad latitude belts: one in the northern hemisphere (~20° N–70° N), and one in the southern hemisphere (~30° S–90° S). In the middle latitude boundary layer over continents, the annual mean IMN rates are generally above 10 4 cm −3 day −1 , with some hot spots reaching 10 5 cm −3 day −1 . The zonally-averaged vertical distribution of IMN rates indicates that IMN is significant in the tropical upper troposphere, the entire middle latitude troposphere, and over Antarctica. Comparing the relative strengths of particle sources due to IMN and due to primary particle emissions demonstrates that IMN is significant on a global scale. Further research is needed to reduce modeling uncertainties and to understand the ultimate contribution of freshly nucleated particles to the abundance of cloud condensation nuclei. |
format |
Article in Journal/Newspaper |
author |
F. Yu Z. Wang G. Luo R. Turco |
author_facet |
F. Yu Z. Wang G. Luo R. Turco |
author_sort |
F. Yu |
title |
Ion-mediated nucleation as an important global source of tropospheric aerosols |
title_short |
Ion-mediated nucleation as an important global source of tropospheric aerosols |
title_full |
Ion-mediated nucleation as an important global source of tropospheric aerosols |
title_fullStr |
Ion-mediated nucleation as an important global source of tropospheric aerosols |
title_full_unstemmed |
Ion-mediated nucleation as an important global source of tropospheric aerosols |
title_sort |
ion-mediated nucleation as an important global source of tropospheric aerosols |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doaj.org/article/889ac26cae0e4943b19b1fb0a170331a |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Atmospheric Chemistry and Physics, Vol 8, Iss 9, Pp 2537-2554 (2008) |
op_relation |
http://www.atmos-chem-phys.net/8/2537/2008/acp-8-2537-2008.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/889ac26cae0e4943b19b1fb0a170331a |
_version_ |
1766272038272499712 |