The composition of nucleation and Aitken modes particles during coastal nucleation events: evidence for marine secondary organic contribution

Vaattovaara, P.; Huttunen, Pertti; Yoon, Young Jun; Joutsensaari, Jorma; Lehtinen, K. E. J.; O’Dowd, Colin; Laaksonen, A.

doi:10.5194/acp-6-4601-2006

Cited by 89 publications

(61 citation statements)

References 67 publications

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“…The subsequent health impacts of marine organics may be underestimated by these results, as studies have shown that the organic mass fraction of marine aerosols is particularly large for particles < 0.125 µm in diameter (O'Dowd et al, 2004). Furthermore, organic vapors from marine sources of VOC have been implicated to aid nucleation events and growth of ultrafine particles in coastal environments, potentially producing large numbers of particles at sizes problematic for human health (Vaattovaara et al, 2006;Modini et al, 2009). While this modeling study shows a small contribution of marine isoprene and monoterpene-SOA to total OC aerosol mass over the ocean, a number of important sources of marine-SOA from biogenic amines and methanesulfonate were not included in the current CMAQ simulations.…”

Section: Discussionmentioning

confidence: 84%

The contribution of marine organics to the air quality of the western United States

2010

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Abstract. The contribution of marine organic emissions to the air quality in coastal areas of the western United States is studied using the latest version of the US Environmental Protection Agency (EPA) regional-scale Community Multiscale Air Quality (CMAQv4.7) modeling system. Emissions of marine isoprene, monoterpenes, and primary organic matter (POM) from the ocean are implemented into the model to provide a comprehensive view of the connection between ocean biology and atmospheric chemistry and air pollution. Model simulations show that marine organics can increase the concentration of PM 2.5 by 0.1-0.3 µg m −3 (up to 5%) in some coastal cities such as San Francisco, CA. This increase in the PM 2.5 concentration is primarily attributed to the POM emissions, with small contributions from the marine isoprene and monoterpenes. When marine organic emissions are included, organic carbon (OC) concentrations over the remote ocean are increased by up to 50% (25% in coastal areas), values consistent with recent observational findings. This study is the first to quantify the air quality impacts from marine POM and monoterpenes for the United States, and it highlights the need for inclusion of marine organic emissions in air quality models.

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Section: Discussionmentioning

confidence: 84%

The contribution of marine organics to the air quality of the western United States

2010

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“…These volatile organic iodine species were also suggested to contribute to ozone depletions in the lower stratosphere, particularly the marine boundary layer [50][51] and cloud condensation in the lower troposphere [52]. In fresh water, such as rivers, lakes and rain, iodine exists also as iodide, iodate and organic iodine, but the relative concentration of organic iodine is higher compared to seawater [53][54][55][56].…”

Section: Speciation Of Iodine In Watermentioning

confidence: 99%

A review on speciation of iodine-129 in the environmental and biological samples

Hou

Hansen

Aldahan

et al. 2009

Analytica Chimica Acta

336

309

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“…Besides DMS, other BVOCs are suspected to be precursors of secondary aerosols, e.g. isoprene (Vaattovaara et al, 2006). A study modelling the Arctic Ocean has highlighted the importance of both DMS and other BVOCs for new particle formation (Karl et al, 2012).…”

Section: Future Implicationsmentioning

confidence: 99%

Comparison between summertime and wintertime Arctic Ocean primary marine aerosol properties

et al. 2013

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Primary marine aerosols (PMAs) are an important source of cloud condensation nuclei, and one of the key elements of the remote marine radiative budget. Changes occurring in the rapidly warming Arctic, most importantly the decreasing sea ice extent, will alter PMA production and hence the Arctic climate through a set of feedback processes. In light of this, laboratory experiments with Arctic Ocean water during both Arctic winter and summer were conducted and focused on PMA emissions as a function of season and water properties. Total particle number concentrations and particle number size distributions were used to characterize the PMA population. A comprehensive data set from the Arctic summer and winter showed a decrease in PMA concentrations for the covered water temperature (T_w) range between −1°C and 15°C. A sharp decrease in PMA emissions for a T_w increase from −1°C to 4°C was followed by a lower rate of change in PMA emissions for T_w up to about 6°C. Near constant number concentrations for water temperatures between 6°C to 10°C and higher were recorded. Even though the total particle number concentration changes for overlapping T_w ranges were consistent between the summer and winter measurements, the distribution of particle number concentrations among the different sizes varied between the seasons. Median particle number concentrations for a dry diameter (D_p< 0.125μm measured during winter conditions were similar (deviation of up to 3%), or lower (up to 70%) than the ones measured during summer conditions (for the same water temperature range). For D_p > 0.125μm, the particle number concentrations during winter were mostly higher than in summer (up to 50%). The normalized particle number size distribution as a function of water temperature was examined for both winter and summer measurements. An increase in T_w from −1°C to 10°C during winter measurements showed a decrease in the peak of relative particle number concentration at about a D_p of 0.180μm, while an increase was observed for particles with D_p > 1μm. Summer measurements exhibited a relative shift to smaller particle sizes for an increase of T_w in the range 7–11°C. The differences in the shape of the number size distributions between winter and summer may be caused by different production of organic material in water, different local processes modifying the water masses within the fjord (for example sea ice production in winter and increased glacial meltwater inflow during summer) and different origin of the dominant sea water mass. Further research is needed regarding the contribution of these factors to the PMA production

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The composition of nucleation and Aitken modes particles during coastal nucleation events: evidence for marine secondary organic contribution

Cited by 89 publications

References 67 publications

The contribution of marine organics to the air quality of the western United States

The contribution of marine organics to the air quality of the western United States

A review on speciation of iodine-129 in the environmental and biological samples

Comparison between summertime and wintertime Arctic Ocean primary marine aerosol properties

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