Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols
Abstract The aqueous‐phase chemistry of deliquescent seasalt aerosols in the remote marine boundary layer is investigated with a steady‐state box model. The model simulates the scavenging of soluble and reactive gaseous species by the seasalt aerosols, the chemical reactions of these species and sea...
Published in: | Berichte der Bunsengesellschaft für physikalische Chemie |
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crwiley:10.1002/bbpc.19920960346 2024-06-02T08:11:34+00:00 Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols Chameides, W. L. Stelson, A. W. 1992 http://dx.doi.org/10.1002/bbpc.19920960346 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fbbpc.19920960346 https://onlinelibrary.wiley.com/doi/pdf/10.1002/bbpc.19920960346 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Berichte der Bunsengesellschaft für physikalische Chemie volume 96, issue 3, page 461-470 ISSN 0005-9021 0005-9021 journal-article 1992 crwiley https://doi.org/10.1002/bbpc.19920960346 2024-05-03T11:44:57Z Abstract The aqueous‐phase chemistry of deliquescent seasalt aerosols in the remote marine boundary layer is investigated with a steady‐state box model. The model simulates the scavenging of soluble and reactive gaseous species by the seasalt aerosols, the chemical reactions of these species and seasalt ions in the deliquescent solution, and changes in the aerosol composition that occur as a result of these processes. Because of the alkalinity of seasalt, the calculations indicate that deliquescent seasalt aerosols are strongly buffered and as a result their pH remains close to 8 until the amount of acid added to the aerosol solution exceeds the alkalinity. The oxidation of chloride by O 3 as well as by free radicals are found to proceed at extremely slow rates and thus these reactions can not explain the high chloride deficits recently observed over the North Atlantic Ocean. On the other hand, the oxidation of dissolved SIV by O 3 in seasalt aerosols is found to proceed at an extremely high rate and appears to explain the observations of nss‐SO 4 2‐ in seasalt aerosols over the Noth Atlantic Ocean. The high rate of SIV oxidation is found to proceed until the amount of nss‐SO 4 2‐ generated in the aerosol is sufficiently large to overwhelm the buffering capacity and lower the pH below 5.5. As a result, the calculations suggest a strong coupling between the cycles of S and alkalinity in the marine boundary layer that may act to limit the generation of cloud condensation nuclei from the oxidation of biogenic S emissions. Article in Journal/Newspaper North Atlantic Wiley Online Library Berichte der Bunsengesellschaft für physikalische Chemie 96 3 461 470 |
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Wiley Online Library |
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English |
description |
Abstract The aqueous‐phase chemistry of deliquescent seasalt aerosols in the remote marine boundary layer is investigated with a steady‐state box model. The model simulates the scavenging of soluble and reactive gaseous species by the seasalt aerosols, the chemical reactions of these species and seasalt ions in the deliquescent solution, and changes in the aerosol composition that occur as a result of these processes. Because of the alkalinity of seasalt, the calculations indicate that deliquescent seasalt aerosols are strongly buffered and as a result their pH remains close to 8 until the amount of acid added to the aerosol solution exceeds the alkalinity. The oxidation of chloride by O 3 as well as by free radicals are found to proceed at extremely slow rates and thus these reactions can not explain the high chloride deficits recently observed over the North Atlantic Ocean. On the other hand, the oxidation of dissolved SIV by O 3 in seasalt aerosols is found to proceed at an extremely high rate and appears to explain the observations of nss‐SO 4 2‐ in seasalt aerosols over the Noth Atlantic Ocean. The high rate of SIV oxidation is found to proceed until the amount of nss‐SO 4 2‐ generated in the aerosol is sufficiently large to overwhelm the buffering capacity and lower the pH below 5.5. As a result, the calculations suggest a strong coupling between the cycles of S and alkalinity in the marine boundary layer that may act to limit the generation of cloud condensation nuclei from the oxidation of biogenic S emissions. |
format |
Article in Journal/Newspaper |
author |
Chameides, W. L. Stelson, A. W. |
spellingShingle |
Chameides, W. L. Stelson, A. W. Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols |
author_facet |
Chameides, W. L. Stelson, A. W. |
author_sort |
Chameides, W. L. |
title |
Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols |
title_short |
Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols |
title_full |
Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols |
title_fullStr |
Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols |
title_full_unstemmed |
Aqueous‐Phase Chemical Processes in Deliquescent Seasalt Aerosols |
title_sort |
aqueous‐phase chemical processes in deliquescent seasalt aerosols |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1002/bbpc.19920960346 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fbbpc.19920960346 https://onlinelibrary.wiley.com/doi/pdf/10.1002/bbpc.19920960346 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Berichte der Bunsengesellschaft für physikalische Chemie volume 96, issue 3, page 461-470 ISSN 0005-9021 0005-9021 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/bbpc.19920960346 |
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Berichte der Bunsengesellschaft für physikalische Chemie |
container_volume |
96 |
container_issue |
3 |
container_start_page |
461 |
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470 |
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