Sea spray aerosol organic enrichment, water uptake and surface tension effects
The aerosol-driven radiative effects on marine low-level cloud represent a large uncertainty in climate simulations, in particular over the Southern Ocean, which is also an important region for sea spray aerosol production. Observations of sea spray aerosol organic enrichment and the resulting impac...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
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European Geosciences Union
2020
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Online Access: | https://eprints.qut.edu.au/203000/ |
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Queensland University of Technology: QUT ePrints |
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The aerosol-driven radiative effects on marine low-level cloud represent a large uncertainty in climate simulations, in particular over the Southern Ocean, which is also an important region for sea spray aerosol production. Observations of sea spray aerosol organic enrichment and the resulting impact on water uptake over the remote Southern Hemisphere are scarce, and therefore the region is underrepresented in existing parameterisations. The Surface Ocean Aerosol Production (SOAP) voyage was a 23 d voyage which sampled three phytoplankton blooms in the highly productive water of the Chatham Rise, east of New Zealand. In this study we examined the enrichment of organics to nascent sea spray aerosol and the modifications to sea spray aerosol water uptake using in situ chamber measurements of seawater samples taken during the SOAP voyage. Primary marine organics contributed up to 23% of the sea spray mass for particles with diameter less than approximately 1 m and up to 79% of the particle volume for 50 nm diameter sea spray. The composition of the submicron organic fraction was consistent throughout the voyage and was largely composed of a polysaccharide-like component, characterised by very low alkane-to-hydroxylconcentration ratios of approximately 0.1 0.2. The enrichment of organics was compared to the output from the chlorophyll-a-based sea spray aerosol parameterisation suggested by Gantt et al. (2011) and the OCEANFILMS (Organic Compounds from Ecosystems to Aerosols: Natural Films and Interfaces via Langmuir Molecular Surfactants) models. OCEANFILMS improved on the representation of the organic fraction predicted using chlorophyll a, in particular when the co-adsorption of polysaccharides was included; however, the model still under-predicted the proportion of polysaccharides by an average of 33 %. Nascent 50 nm diameter sea spray aerosol hygroscopic growth factors measured at 90% relative humidity averaged 1:930:08 and did not decrease with increasing sea spray aerosol organic fractions. The observed ... |
format |
Article in Journal/Newspaper |
author |
T. Cravigan, Luke Mallet, Marc Vaattovaara, Petri J. Harvey, Mike S. Law, Cliff L. Modini, Robin M. Russell, Lynn Stelcer, Ed D. Cohen, David Olsen, Greg Safi, Karl J. Burrell, Timothy Ristovski, Zoran |
spellingShingle |
T. Cravigan, Luke Mallet, Marc Vaattovaara, Petri J. Harvey, Mike S. Law, Cliff L. Modini, Robin M. Russell, Lynn Stelcer, Ed D. Cohen, David Olsen, Greg Safi, Karl J. Burrell, Timothy Ristovski, Zoran Sea spray aerosol organic enrichment, water uptake and surface tension effects |
author_facet |
T. Cravigan, Luke Mallet, Marc Vaattovaara, Petri J. Harvey, Mike S. Law, Cliff L. Modini, Robin M. Russell, Lynn Stelcer, Ed D. Cohen, David Olsen, Greg Safi, Karl J. Burrell, Timothy Ristovski, Zoran |
author_sort |
T. Cravigan, Luke |
title |
Sea spray aerosol organic enrichment, water uptake and surface tension effects |
title_short |
Sea spray aerosol organic enrichment, water uptake and surface tension effects |
title_full |
Sea spray aerosol organic enrichment, water uptake and surface tension effects |
title_fullStr |
Sea spray aerosol organic enrichment, water uptake and surface tension effects |
title_full_unstemmed |
Sea spray aerosol organic enrichment, water uptake and surface tension effects |
title_sort |
sea spray aerosol organic enrichment, water uptake and surface tension effects |
publisher |
European Geosciences Union |
publishDate |
2020 |
url |
https://eprints.qut.edu.au/203000/ |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Atmospheric Chemistry and Physics |
op_relation |
https://eprints.qut.edu.au/203000/1/65030597.pdf doi:10.5194/acp-20-7955-2020 T. Cravigan, Luke, Mallet, Marc, Vaattovaara, Petri, J. Harvey, Mike, S. Law, Cliff, L. Modini, Robin, M. Russell, Lynn, Stelcer, Ed, D. Cohen, David, Olsen, Greg, Safi, Karl, J. Burrell, Timothy, & Ristovski, Zoran (2020) Sea spray aerosol organic enrichment, water uptake and surface tension effects. Atmospheric Chemistry and Physics, 20(13), pp. 7955-7977. https://eprints.qut.edu.au/203000/ Centre for the Environment; Institute for Future Environments; Science & Engineering Faculty; Faculty of Science; School of Earth & Atmospheric Sciences; Centre for Tropical Crops and Biocommodities |
op_rights |
free_to_read http://creativecommons.org/licenses/by/4.0/ The Author(s) 2020 This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.5194/acp-20-7955-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
13 |
container_start_page |
7955 |
op_container_end_page |
7977 |
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1799467419593342976 |
spelling |
ftqueensland:oai:eprints.qut.edu.au:203000 2024-05-19T07:49:00+00:00 Sea spray aerosol organic enrichment, water uptake and surface tension effects T. Cravigan, Luke Mallet, Marc Vaattovaara, Petri J. Harvey, Mike S. Law, Cliff L. Modini, Robin M. Russell, Lynn Stelcer, Ed D. Cohen, David Olsen, Greg Safi, Karl J. Burrell, Timothy Ristovski, Zoran 2020-07-09 application/pdf https://eprints.qut.edu.au/203000/ unknown European Geosciences Union https://eprints.qut.edu.au/203000/1/65030597.pdf doi:10.5194/acp-20-7955-2020 T. Cravigan, Luke, Mallet, Marc, Vaattovaara, Petri, J. Harvey, Mike, S. Law, Cliff, L. Modini, Robin, M. Russell, Lynn, Stelcer, Ed, D. Cohen, David, Olsen, Greg, Safi, Karl, J. Burrell, Timothy, & Ristovski, Zoran (2020) Sea spray aerosol organic enrichment, water uptake and surface tension effects. Atmospheric Chemistry and Physics, 20(13), pp. 7955-7977. https://eprints.qut.edu.au/203000/ Centre for the Environment; Institute for Future Environments; Science & Engineering Faculty; Faculty of Science; School of Earth & Atmospheric Sciences; Centre for Tropical Crops and Biocommodities free_to_read http://creativecommons.org/licenses/by/4.0/ The Author(s) 2020 This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Atmospheric Chemistry and Physics Contribution to Journal 2020 ftqueensland https://doi.org/10.5194/acp-20-7955-2020 2024-04-30T23:51:29Z The aerosol-driven radiative effects on marine low-level cloud represent a large uncertainty in climate simulations, in particular over the Southern Ocean, which is also an important region for sea spray aerosol production. Observations of sea spray aerosol organic enrichment and the resulting impact on water uptake over the remote Southern Hemisphere are scarce, and therefore the region is underrepresented in existing parameterisations. The Surface Ocean Aerosol Production (SOAP) voyage was a 23 d voyage which sampled three phytoplankton blooms in the highly productive water of the Chatham Rise, east of New Zealand. In this study we examined the enrichment of organics to nascent sea spray aerosol and the modifications to sea spray aerosol water uptake using in situ chamber measurements of seawater samples taken during the SOAP voyage. Primary marine organics contributed up to 23% of the sea spray mass for particles with diameter less than approximately 1 m and up to 79% of the particle volume for 50 nm diameter sea spray. The composition of the submicron organic fraction was consistent throughout the voyage and was largely composed of a polysaccharide-like component, characterised by very low alkane-to-hydroxylconcentration ratios of approximately 0.1 0.2. The enrichment of organics was compared to the output from the chlorophyll-a-based sea spray aerosol parameterisation suggested by Gantt et al. (2011) and the OCEANFILMS (Organic Compounds from Ecosystems to Aerosols: Natural Films and Interfaces via Langmuir Molecular Surfactants) models. OCEANFILMS improved on the representation of the organic fraction predicted using chlorophyll a, in particular when the co-adsorption of polysaccharides was included; however, the model still under-predicted the proportion of polysaccharides by an average of 33 %. Nascent 50 nm diameter sea spray aerosol hygroscopic growth factors measured at 90% relative humidity averaged 1:930:08 and did not decrease with increasing sea spray aerosol organic fractions. The observed ... Article in Journal/Newspaper Southern Ocean Queensland University of Technology: QUT ePrints Atmospheric Chemistry and Physics 20 13 7955 7977 |