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Precursors to Particles (P2P) at Cape Grim 2006: campaign overview


Cainey, JM and Keywood, M and Grose, MR and Krummel, PJA and Galbally, IE and Johnston, P and Gillett, RW and Meyer, M and Fraser, P and Steele, P and Harvey, M and Kreher, K and Stein, T and Ibrahim, O and Ristovski, ZD and Johnson, G and Fletcher, CA and Bigg, EK and Gras, JL, Precursors to Particles (P2P) at Cape Grim 2006: campaign overview, Environmental Chemistry, 4, (3) pp. 143-150. ISSN 1448-2517 (2007) [Refereed Article]

DOI: doi:10.1071/EN07041


Iodine emissions from coastal macroalgae have been found to be important initiators for nucleation events at Mace Head, Ireland. The source of this iodine is the large beds of the brown kelp Laminaria digitata, which are significantly exposed at low tide. On the coast around Cape Grim, Tasmania, there are beds of the brown kelp Durvillaea potatrum. The Precursors to Particles 2006 (P2P 2006) campaign at the Cape Grim Baseline Air Pollution Station in late summer (February) 2006 focused on the role of this local kelp in providing precursor gases to particle formation. Durvillaea potatorum does not produce iodated precursor gases at the levels observed at Mace Head. IO was measured at 0.5 ± 0.3 ppt, while OIO was below detection limits (9 ppt). The dominant atmospheric iodated species was methyl iodide and the average concentration measured at the Cape Grim Station was 1.5 ± 0.3 pptv in baseline conditions, but showed significant variation in discrete samples collected immediately above the ocean surface. Nucleation events were not detected at the Cape Grim Station, except for one period where the plume of a local bushfire interacted with air of marine origin. The passage of four fronts did not result in nucleation bursts and measurements on the beach 94 m below the Cape Grim Station suggested that Durvillaea potatorum was only a weak source of new particles. © CSIRO 2007.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Atmospheric sciences not elsewhere classified
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Air quality
UTAS Author:Grose, MR (Dr Michael Grose)
ID Code:49948
Year Published:2007
Web of Science® Times Cited:14
Deposited By:IASOS
Deposited On:2007-08-01
Last Modified:2009-04-03

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