Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign
Volatile organic compounds (VOCs) are important precursors to the formation of ozone and fine particulate matter, the two pollutants of most concern in Sydney, Australia. Despite this importance, there are very few published measurements of ambient VOC concentrations in Australia. In this paper, we...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-07-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/10/7/383 |
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| author | Élise-Andrée Guérette Clare Paton-Walsh Ian Galbally Suzie Molloy Sarah Lawson Dagmar Kubistin Rebecca Buchholz David W.T. Griffith Ray L. Langenfelds Paul B. Krummel Zoe Loh Scott Chambers Alan Griffiths Melita Keywood Paul Selleck Doreena Dominick Ruhi Humphries Stephen R. Wilson |
| author_facet | Élise-Andrée Guérette Clare Paton-Walsh Ian Galbally Suzie Molloy Sarah Lawson Dagmar Kubistin Rebecca Buchholz David W.T. Griffith Ray L. Langenfelds Paul B. Krummel Zoe Loh Scott Chambers Alan Griffiths Melita Keywood Paul Selleck Doreena Dominick Ruhi Humphries Stephen R. Wilson |
| author_sort | Élise-Andrée Guérette |
| collection | DOAJ |
| description | Volatile organic compounds (VOCs) are important precursors to the formation of ozone and fine particulate matter, the two pollutants of most concern in Sydney, Australia. Despite this importance, there are very few published measurements of ambient VOC concentrations in Australia. In this paper, we present mole fractions of several important VOCs measured during the campaign known as MUMBA (Measurements of Urban, Marine and Biogenic Air) in the Australian city of Wollongong (34°S). We particularly focus on measurements made during periods when clean marine air impacted the measurement site and on VOCs of biogenic origin. Typical unpolluted marine air mole fractions during austral summer 2012-2013 at latitude 34°S were established for CO<sub>2</sub> (391.0 ± 0.6 ppm), CH<sub>4</sub> (1760.1 ± 0.4 ppb), N<sub>2</sub>O (325.04 ± 0.08 ppb), CO (52.4 ± 1.7 ppb), O<sub>3</sub> (20.5 ± 1.1 ppb), acetaldehyde (190 ± 40 ppt), acetone (260 ± 30 ppt), dimethyl sulphide (50 ± 10 ppt), benzene (20 ± 10 ppt), toluene (30 ± 20 ppt), C<sub>8</sub>H<sub>10</sub> aromatics (23 ± 6 ppt) and C<sub>9</sub>H<sub>12</sub> aromatics (36 ± 7 ppt). The MUMBA site was frequently influenced by VOCs of biogenic origin from a nearby strip of forested parkland to the east due to the dominant north-easterly afternoon sea breeze. VOCs from the more distant densely forested escarpment to the west also impacted the site, especially during two days of extreme heat and strong westerly winds. The relative amounts of different biogenic VOCs observed for these two biomes differed, with much larger increases of isoprene than of monoterpenes or methanol during the hot westerly winds from the escarpment than with cooler winds from the east. However, whether this was due to different vegetation types or was solely the result of the extreme temperatures is not entirely clear. We conclude that the clean marine air and biogenic signatures measured during the MUMBA campaign provide useful information about the typical abundance of several key VOCs and can be used to constrain chemical transport model simulations of the atmosphere in this poorly sampled region of the world. |
| first_indexed | 2024-12-21T13:27:38Z |
| format | Article |
| id | doaj.art-451805f3850d472a98ba0ee5f05c4b4f |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-12-21T13:27:38Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-451805f3850d472a98ba0ee5f05c4b4f2022-12-21T19:02:24ZengMDPI AGAtmosphere2073-44332019-07-0110738310.3390/atmos10070383atmos10070383Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA CampaignÉlise-Andrée Guérette0Clare Paton-Walsh1Ian Galbally2Suzie Molloy3Sarah Lawson4Dagmar Kubistin5Rebecca Buchholz6David W.T. Griffith7Ray L. Langenfelds8Paul B. Krummel9Zoe Loh10Scott Chambers11Alan Griffiths12Melita Keywood13Paul Selleck14Doreena Dominick15Ruhi Humphries16Stephen R. Wilson17Centre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaClimate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, AustraliaClimate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaClimate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, AustraliaClimate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, AustraliaClimate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaClimate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, AustraliaClimate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AustraliaVolatile organic compounds (VOCs) are important precursors to the formation of ozone and fine particulate matter, the two pollutants of most concern in Sydney, Australia. Despite this importance, there are very few published measurements of ambient VOC concentrations in Australia. In this paper, we present mole fractions of several important VOCs measured during the campaign known as MUMBA (Measurements of Urban, Marine and Biogenic Air) in the Australian city of Wollongong (34°S). We particularly focus on measurements made during periods when clean marine air impacted the measurement site and on VOCs of biogenic origin. Typical unpolluted marine air mole fractions during austral summer 2012-2013 at latitude 34°S were established for CO<sub>2</sub> (391.0 ± 0.6 ppm), CH<sub>4</sub> (1760.1 ± 0.4 ppb), N<sub>2</sub>O (325.04 ± 0.08 ppb), CO (52.4 ± 1.7 ppb), O<sub>3</sub> (20.5 ± 1.1 ppb), acetaldehyde (190 ± 40 ppt), acetone (260 ± 30 ppt), dimethyl sulphide (50 ± 10 ppt), benzene (20 ± 10 ppt), toluene (30 ± 20 ppt), C<sub>8</sub>H<sub>10</sub> aromatics (23 ± 6 ppt) and C<sub>9</sub>H<sub>12</sub> aromatics (36 ± 7 ppt). The MUMBA site was frequently influenced by VOCs of biogenic origin from a nearby strip of forested parkland to the east due to the dominant north-easterly afternoon sea breeze. VOCs from the more distant densely forested escarpment to the west also impacted the site, especially during two days of extreme heat and strong westerly winds. The relative amounts of different biogenic VOCs observed for these two biomes differed, with much larger increases of isoprene than of monoterpenes or methanol during the hot westerly winds from the escarpment than with cooler winds from the east. However, whether this was due to different vegetation types or was solely the result of the extreme temperatures is not entirely clear. We conclude that the clean marine air and biogenic signatures measured during the MUMBA campaign provide useful information about the typical abundance of several key VOCs and can be used to constrain chemical transport model simulations of the atmosphere in this poorly sampled region of the world.https://www.mdpi.com/2073-4433/10/7/383volatile organic compoundsVOCsair qualityclean marine airbiogenicMUMBA |
| spellingShingle | Élise-Andrée Guérette Clare Paton-Walsh Ian Galbally Suzie Molloy Sarah Lawson Dagmar Kubistin Rebecca Buchholz David W.T. Griffith Ray L. Langenfelds Paul B. Krummel Zoe Loh Scott Chambers Alan Griffiths Melita Keywood Paul Selleck Doreena Dominick Ruhi Humphries Stephen R. Wilson Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign Atmosphere volatile organic compounds VOCs air quality clean marine air biogenic MUMBA |
| title | Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign |
| title_full | Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign |
| title_fullStr | Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign |
| title_full_unstemmed | Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign |
| title_short | Composition of Clean Marine Air and Biogenic Influences on VOCs during the MUMBA Campaign |
| title_sort | composition of clean marine air and biogenic influences on vocs during the mumba campaign |
| topic | volatile organic compounds VOCs air quality clean marine air biogenic MUMBA |
| url | https://www.mdpi.com/2073-4433/10/7/383 |
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