2004
DOI: 10.5194/acp-4-701-2004
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Direct evidence for coastal iodine particles from Laminaria macroalgae – linkage to emissions of molecular iodine

Abstract: Abstract.Renewal of ultrafine aerosols in the marine boundary layer may lead to repopulation of the marine distribution and ultimately determine the concentration of cloud condensation nuclei (CCN). Thus the formation of nanometre-scale particles can lead to enhanced scattering of incoming radiation and a net cooling of the atmosphere. The recent demonstration of the chamber formation of new particles from the photolytic production of condensable iodine-containing compounds from diiodomethane (CH 2

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Cited by 275 publications
(338 citation statements)
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“…We have deduced previously that the nucleation precursor and nucleation processes occur near the coast only, so it is unlikely that sulfuric acid is the precursor. Field measurements at Mace Head, Ireland, and lab studies indicate that CH 2 I 2 [Makela et al, 2002;Hoffmann et al, 2001;Jimenez et al, 2003] or I 2 [Saiz-Lopez and Plane, 2004;McFiggans et al, 2004] out gassed from the ocean may be precursors for nucleation.…”
Section: Effect Of Wind Speed On Nucleationmentioning
confidence: 99%
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“…We have deduced previously that the nucleation precursor and nucleation processes occur near the coast only, so it is unlikely that sulfuric acid is the precursor. Field measurements at Mace Head, Ireland, and lab studies indicate that CH 2 I 2 [Makela et al, 2002;Hoffmann et al, 2001;Jimenez et al, 2003] or I 2 [Saiz-Lopez and Plane, 2004;McFiggans et al, 2004] out gassed from the ocean may be precursors for nucleation.…”
Section: Effect Of Wind Speed On Nucleationmentioning
confidence: 99%
“…[20] One hypothesis is that CH 2 I 2 or I 2 will react chemically to produce nucleation precursors [Hoffmann et al, 2001;Saiz-Lopez and Plane, 2004;McFiggans et al, 2004]. The production rate of these precursors (P i ) is assumed to be…”
Section: Effect Of Wind Speed On Nucleationmentioning
confidence: 99%
“…insolation-related atmospheric processes [1,2], formation of cloud condensation nuclei [3], and the chemical depletion of ozone [4]. Furthermore, observations are in discrepancy with model outputs which suggest that iodate should be the main I species in atmospheric depositions [5,6].…”
mentioning
confidence: 73%
“…This may indicate changes in marine primary productivity, since the main source of iodine in the atmosphere is the release of organic compounds from the ocean surface. IO 3 − was not present above detection limits, even though it is believed to be the most stable form of iodine in the atmosphere. Due to the complexity of the atmospheric iodine cycle, further research is necessary to understand the behavior of this species in polar regions.…”
Section: Discussionmentioning
confidence: 99%
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