Low‐Volatility Vapors and New Particle Formation Over the Southern Ocean During the Antarctic Circumnavigation Expedition.
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| Title: | Low‐Volatility Vapors and New Particle Formation Over the Southern Ocean During the Antarctic Circumnavigation Expedition. |
|---|---|
| Authors: | Baccarini, Andrea1,2, Dommen, Josef2, Lehtipalo, Katrianne3,4, Henning, Silvia5, Modini, Robin L.2, Gysel‐Beer, Martin2, Baltensperger, Urs2, Schmale, Julia1 julia.schmale@epfl.ch |
| Source: | Journal of Geophysical Research. Atmospheres. 11/27/2021, Vol. 126 Issue 22, p1-25. 25p. |
| Subject Terms: | *Sulfuric acid, *Aerosols, Voyages around the world, Iodic acid |
| Geographic Terms: | Antarctic Ocean |
| Abstract: | During summer, the Southern Ocean is largely unaffected by anthropogenic emissions, which makes this region an ideal place to investigate marine natural aerosol sources and processes. A better understanding of natural aerosol is key to constrain the preindustrial aerosol state and reduce the aerosol radiative forcing uncertainty in global climate models. We report the concentrations of gaseous sulfuric acid, iodic acid, and methanesulfonic acid (MSA) together with a characterization of new particle formation (NPF) events over a large stretch of the Southern Ocean. Measurements were conducted on board the Russian icebreaker Akademik Tryoshnikov from January to March 2017. Iodic acid is characterized by a particular diurnal cycle with reduced concentration around noon, suggesting a lower formation yield when solar irradiance is higher. Gaseous MSA does not have a diurnal cycle and measured concentrations in gas and condensed phase are compatible with this species being primarily produced via heterogeneous oxidation of dimethyl sulfide and subsequent partitioning into the gas phase. We also found that NPF in the boundary layer is mainly driven by sulfuric acid but it occurred very rarely over the vast geographical area probed and did not contribute to the cloud condensation nuclei budget in a directly observable manner. Despite the near absence of NPF events in the boundary layer, Aitken mode particles were frequently measured, supporting the hypothesis of a free tropospheric source. Iodic acid and MSA were not found to participate in nucleation, however, MSA may contribute to aerosol growth via heterogeneous formation in the aqueous phase. Key Points: Production of methanesulfonic acid occurred predominantly in the condensed phase, followed by enhanced volatilization at lower relative humidityThe observed new particle formation events were probably driven by sulfuric acid and the environmental conditions (mainly temperature and condensation sink)Boundary layer new particle formation over the Southern Ocean in summer occurred very sporadically and does not contribute to the cloud condensation nuclei budget [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Atmospheres is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | GreenFILE |
| FullText | Text: Availability: 0 |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 153935911 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Low‐Volatility Vapors and New Particle Formation Over the Southern Ocean During the Antarctic Circumnavigation Expedition. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Baccarini%2C+Andrea%22">Baccarini, Andrea</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Dommen%2C+Josef%22">Dommen, Josef</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Lehtipalo%2C+Katrianne%22">Lehtipalo, Katrianne</searchLink><relatesTo>3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Henning%2C+Silvia%22">Henning, Silvia</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Modini%2C+Robin+L%2E%22">Modini, Robin L.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Gysel‐Beer%2C+Martin%22">Gysel‐Beer, Martin</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Baltensperger%2C+Urs%22">Baltensperger, Urs</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Schmale%2C+Julia%22">Schmale, Julia</searchLink><relatesTo>1</relatesTo><i> julia.schmale@epfl.ch</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Atmospheres%22">Journal of Geophysical Research. Atmospheres</searchLink>. 11/27/2021, Vol. 126 Issue 22, p1-25. 25p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Sulfuric+acid%22">Sulfuric acid</searchLink><br />*<searchLink fieldCode="DE" term="%22Aerosols%22">Aerosols</searchLink><br /><searchLink fieldCode="DE" term="%22Voyages+around+the+world%22">Voyages around the world</searchLink><br /><searchLink fieldCode="DE" term="%22Iodic+acid%22">Iodic acid</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Antarctic+Ocean%22">Antarctic Ocean</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: During summer, the Southern Ocean is largely unaffected by anthropogenic emissions, which makes this region an ideal place to investigate marine natural aerosol sources and processes. A better understanding of natural aerosol is key to constrain the preindustrial aerosol state and reduce the aerosol radiative forcing uncertainty in global climate models. We report the concentrations of gaseous sulfuric acid, iodic acid, and methanesulfonic acid (MSA) together with a characterization of new particle formation (NPF) events over a large stretch of the Southern Ocean. Measurements were conducted on board the Russian icebreaker Akademik Tryoshnikov from January to March 2017. Iodic acid is characterized by a particular diurnal cycle with reduced concentration around noon, suggesting a lower formation yield when solar irradiance is higher. Gaseous MSA does not have a diurnal cycle and measured concentrations in gas and condensed phase are compatible with this species being primarily produced via heterogeneous oxidation of dimethyl sulfide and subsequent partitioning into the gas phase. We also found that NPF in the boundary layer is mainly driven by sulfuric acid but it occurred very rarely over the vast geographical area probed and did not contribute to the cloud condensation nuclei budget in a directly observable manner. Despite the near absence of NPF events in the boundary layer, Aitken mode particles were frequently measured, supporting the hypothesis of a free tropospheric source. Iodic acid and MSA were not found to participate in nucleation, however, MSA may contribute to aerosol growth via heterogeneous formation in the aqueous phase. Key Points: Production of methanesulfonic acid occurred predominantly in the condensed phase, followed by enhanced volatilization at lower relative humidityThe observed new particle formation events were probably driven by sulfuric acid and the environmental conditions (mainly temperature and condensation sink)Boundary layer new particle formation over the Southern Ocean in summer occurred very sporadically and does not contribute to the cloud condensation nuclei budget [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Atmospheres is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1029/2021JD035126 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 25 StartPage: 1 Subjects: – SubjectFull: Sulfuric acid Type: general – SubjectFull: Aerosols Type: general – SubjectFull: Voyages around the world Type: general – SubjectFull: Iodic acid Type: general – SubjectFull: Antarctic Ocean Type: general Titles: – TitleFull: Low‐Volatility Vapors and New Particle Formation Over the Southern Ocean During the Antarctic Circumnavigation Expedition. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Baccarini, Andrea – PersonEntity: Name: NameFull: Dommen, Josef – PersonEntity: Name: NameFull: Lehtipalo, Katrianne – PersonEntity: Name: NameFull: Henning, Silvia – PersonEntity: Name: NameFull: Modini, Robin L. – PersonEntity: Name: NameFull: Gysel‐Beer, Martin – PersonEntity: Name: NameFull: Baltensperger, Urs – PersonEntity: Name: NameFull: Schmale, Julia IsPartOfRelationships: – BibEntity: Dates: – D: 27 M: 11 Text: 11/27/2021 Type: published Y: 2021 Identifiers: – Type: issn-print Value: 2169897X Numbering: – Type: volume Value: 126 – Type: issue Value: 22 Titles: – TitleFull: Journal of Geophysical Research. Atmospheres Type: main |
| ResultId | 1 |
