Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere
Sea salt aerosols (SSA) are dominant particles in the Arctic atmosphere and determine the polar radiative balance. SSA react with acidic pollutants that lead to changes in physical and chemical properties of their surface, which in turn alter their hygroscopic and optical properties. Transmission el...
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ftcopernicus:oai:publications.copernicus.org:acp30626 2023-05-15T14:51:55+02:00 Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere Chi, J. W. Li, W. J. Zhang, D. Z. Zhang, J. C. Lin, Y. T. Shen, X. J. Sun, J. Y. Chen, J. M. Zhang, X. Y. Zhang, Y. M. Wang, W. X. 2018-10-10 application/pdf https://doi.org/10.5194/acp-15-11341-2015 https://www.atmos-chem-phys.net/15/11341/2015/ eng eng doi:10.5194/acp-15-11341-2015 https://www.atmos-chem-phys.net/15/11341/2015/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-15-11341-2015 2019-12-24T09:53:03Z Sea salt aerosols (SSA) are dominant particles in the Arctic atmosphere and determine the polar radiative balance. SSA react with acidic pollutants that lead to changes in physical and chemical properties of their surface, which in turn alter their hygroscopic and optical properties. Transmission electron microscopy with energy-dispersive X-ray spectrometry was used to analyze morphology, composition, size, and mixing state of individual SSA at Ny-Ålesund, Svalbard, in summertime. Individual fresh SSA contained cubic NaCl coated by certain amounts of MgCl 2 and CaSO 4 . Individual partially aged SSA contained irregular NaCl coated by a mixture of NaNO 3 , Na 2 SO 4 , Mg(NO 3 ) 2 , and MgSO 4 . The comparison suggests the hydrophilic MgCl 2 coating in fresh SSA likely intrigued the heterogeneous reactions at the beginning of SSA and acidic gases. Individual fully aged SSA normally had Na 2 SO 4 cores and an amorphous coating of NaNO 3 . Elemental mappings of individual SSA particles revealed that as the particles ageing Cl gradually decreased, the C, N, O, and S content increased. 12 C - mapping from nanoscale secondary ion mass spectrometry indicates that organic matter increased in the aged SSA compared with the fresh SSA. 12 C - line scan further shows that organic matter was mainly concentrated on the aged SSA surface. These new findings indicate that this mixture of organic matter and NaNO 3 on particle surfaces likely determines their hygroscopic and optical properties. These abundant SSA as reactive surfaces adsorbing inorganic and organic acidic gases can shorten acidic gas lifetime and influence the possible gaseous reactions in the Arctic atmosphere, which need to be incorporated into atmospheric chemical models in the Arctic troposphere. Text Arctic Ny Ålesund Ny-Ålesund Svalbard Copernicus Publications: E-Journals Arctic Ny-Ålesund Svalbard Atmospheric Chemistry and Physics 15 19 11341 11353 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Sea salt aerosols (SSA) are dominant particles in the Arctic atmosphere and determine the polar radiative balance. SSA react with acidic pollutants that lead to changes in physical and chemical properties of their surface, which in turn alter their hygroscopic and optical properties. Transmission electron microscopy with energy-dispersive X-ray spectrometry was used to analyze morphology, composition, size, and mixing state of individual SSA at Ny-Ålesund, Svalbard, in summertime. Individual fresh SSA contained cubic NaCl coated by certain amounts of MgCl 2 and CaSO 4 . Individual partially aged SSA contained irregular NaCl coated by a mixture of NaNO 3 , Na 2 SO 4 , Mg(NO 3 ) 2 , and MgSO 4 . The comparison suggests the hydrophilic MgCl 2 coating in fresh SSA likely intrigued the heterogeneous reactions at the beginning of SSA and acidic gases. Individual fully aged SSA normally had Na 2 SO 4 cores and an amorphous coating of NaNO 3 . Elemental mappings of individual SSA particles revealed that as the particles ageing Cl gradually decreased, the C, N, O, and S content increased. 12 C - mapping from nanoscale secondary ion mass spectrometry indicates that organic matter increased in the aged SSA compared with the fresh SSA. 12 C - line scan further shows that organic matter was mainly concentrated on the aged SSA surface. These new findings indicate that this mixture of organic matter and NaNO 3 on particle surfaces likely determines their hygroscopic and optical properties. These abundant SSA as reactive surfaces adsorbing inorganic and organic acidic gases can shorten acidic gas lifetime and influence the possible gaseous reactions in the Arctic atmosphere, which need to be incorporated into atmospheric chemical models in the Arctic troposphere. |
format |
Text |
author |
Chi, J. W. Li, W. J. Zhang, D. Z. Zhang, J. C. Lin, Y. T. Shen, X. J. Sun, J. Y. Chen, J. M. Zhang, X. Y. Zhang, Y. M. Wang, W. X. |
spellingShingle |
Chi, J. W. Li, W. J. Zhang, D. Z. Zhang, J. C. Lin, Y. T. Shen, X. J. Sun, J. Y. Chen, J. M. Zhang, X. Y. Zhang, Y. M. Wang, W. X. Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere |
author_facet |
Chi, J. W. Li, W. J. Zhang, D. Z. Zhang, J. C. Lin, Y. T. Shen, X. J. Sun, J. Y. Chen, J. M. Zhang, X. Y. Zhang, Y. M. Wang, W. X. |
author_sort |
Chi, J. W. |
title |
Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere |
title_short |
Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere |
title_full |
Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere |
title_fullStr |
Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere |
title_full_unstemmed |
Sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the Arctic troposphere |
title_sort |
sea salt aerosols as a reactive surface for inorganic and organic acidic gases in the arctic troposphere |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-15-11341-2015 https://www.atmos-chem-phys.net/15/11341/2015/ |
geographic |
Arctic Ny-Ålesund Svalbard |
geographic_facet |
Arctic Ny-Ålesund Svalbard |
genre |
Arctic Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund Svalbard |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-15-11341-2015 https://www.atmos-chem-phys.net/15/11341/2015/ |
op_doi |
https://doi.org/10.5194/acp-15-11341-2015 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
15 |
container_issue |
19 |
container_start_page |
11341 |
op_container_end_page |
11353 |
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1766323055151284224 |