Contribution of particulate sulfate and organic carbon to cloud condensation nuclei in the marine atmosphere

Matsumoto, Kiyoshi; Tanaka, Hiroshi; Nagao, Ippei; Ishizaka, Yutaka

doi:10.1029/97gl00541

Cited by 119 publications

(87 citation statements)

References 8 publications

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“…Recent field measurements clearly document the presence of organic matter in individual particles (Middlebrook et al 1998) and a relevant contribution of organic species to fine aerosol mass in the unperturbed MBL (Putaud et al 2000). However, the role of organic compounds in the remote marine aerosol, although recognized as potentially important (Matsumoto et al 1997;Novakov et al 1997), remains largely uncertain, mainly due to the lack of quantitative measurements of their size-dependent composition. Further, despite a large number of studies on the occurrence of individual compounds or classes of compounds, e.g.…”

Section: Chemical Compositionmentioning

confidence: 99%

Marine aerosol production: a review of the current knowledge

O’Dowd

Leeuw

2007

Phil. Trans. R. Soc. A.

659

568

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The current knowledge in primary and secondary marine aerosol formation is reviewed. For primary marine aerosol source functions, recent source functions have demonstrated a significant flux of submicrometre particles down to radii of 20 nm. Moreover, the source functions derived from different techniques up to 10 mm have come within a factor of two of each other. For secondary marine aerosol formation, recent advances have identified iodine oxides and isoprene oxidation products, in addition to sulphuric acid, as contributing to formation and growth, although the exact roles remains to be determined. While a multistep process seems to be required, isoprene oxidation products are more likely to participate in growth and sulphuric acid is more likely to participate in nucleation. Iodine oxides are likely to participate in both nucleation and growth.

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Section: Chemical Compositionmentioning

confidence: 99%

Marine aerosol production: a review of the current knowledge

O’Dowd

Leeuw

2007

Phil. Trans. R. Soc. A.

659

568

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“…The soluble organic components have little effects on CCN number concentration when supersaturation is high or nss-sulfate is low. The measurement study of Matsumoto et al (1997) also showed the soluble organic salts were relatively more predominant than nss-sulfate and made a significant contribution to CCN number Fig. 3.…”

Section: Role Of Soluble Organic Componentsmentioning

confidence: 99%

“…Saxena et al (1995) found that organics could enhance water absorption by inorganic, and pointed out the potential importance of organic compounds in influencing the CCN properties (Saxena and Hildemann 1996). Matsumoto et al (1997) studied the contribution of particulate sulfates and organic carbon to CCN in the marine atmosphere. They found that not only sulfates, but also water-soluble organic salts were dominant in fine aerosols.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Impacts of Multi-Component Aerosols on Marine Cloud Microphysical Properties

Zhao

Ishizaka

Peng

2005

Journal of the Meteorological Society of Japan

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In this paper impacts of nss-sulfate, sea-salt and organic particles on microphysical properties of marine cloud are investigated, using a mutil-component size-resolving aerosol model. Numerical results show that the number and type of cloud condensation nuclei (CCN) depend on particle physical and chemical properties (size distribution, chemical composition) of particles, and on environmental conditions (updrafts or supersaturation). Sea-salt particles play a critical role in cloud microphysical processes. Due to its large radius, sea-salt particles are activated into cloud drops in the initial cloud development. Sea-salt activation decreases supersaturation by consuming water vapor and suppresses nss-sulfate activation. Nss-sulfate indirect forcing may be overestimated in some conditions (such as updraft is low), because of the presence of sea-salt particles. Soluble organic components decrease maximum supersaturation, and lead to a decrease of cloud drops activated at the case of a high nss-sulfate and a high updraft velocity. Nss-sulfate CCN account for most variations of the cloud optical depth (COD). Sea-salt increases COD in the case of low nss-sulfate, but decreases COD when nss-sulfate concentration is high. The organic component enhances this influence of sea-salt on COD.

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“…Particles in this size range have long atmospheric lifetimes and scatter solar radiation. SOA can also change cloud's properties by acting as cloud condensation nuclei (CCN) (Saxena et al, 1995;Lohmann and Feichter, 2005;Novakov and Penner, 1993;RiveraCarpio et al, 1996;Matsumoto et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Relating hygroscopicity and optical properties to chemical composition and structure of secondary organic aerosol particles generated from the ozonolysis of α-pinene

et al. 2015

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Abstract. Secondary organic aerosol (SOA) were generated from the ozonolysis of α-pinene in the CESAM (French acronym for Experimental Multiphasic Atmospheric Simulation Chamber) simulation chamber. The SOA formation and aging were studied by following their optical, hygroscopic and chemical properties. The optical properties were investigated by determining the particle complex refractive index (CRI). The hygroscopicity was quantified by measuring the effect of relative humidity (RH) on the particle size (size growth factor, GF) and on the scattering coefficient (scattering growth factor, f (RH)). The oxygen to carbon atomic ratios (O : C) of the particle surface and bulk were used as a sensitive parameter to correlate the changes in hygroscopic and optical properties of the SOA composition during their formation and aging in CESAM.The real CRI at 525 nm wavelength decreased from 1.43-1.60 (±0.02) to 1.32-1.38 (±0.02) during the SOA formation. The decrease in the real CRI correlated to the O : C decrease from 0.68 (±0.20) to 0.55 (±0.16). In contrast, the GF remained roughly constant over the reaction time, with values of 1.02-1.07 (±0.02) at 90 % (±4.2 %) RH. Simultaneous measurements of O : C of the particle surface revealed that the SOA was not composed of a homogeneous mixture, but contained less oxidised species at the surface which may limit water absorption. In addition, an apparent change in both mobility diameter and scattering coefficient with increasing RH from 0 to 30 % was observed for SOA after 14 h of reaction. We postulate that this change could be due to a change in the viscosity of the SOA from a predominantly glassy state to a predominantly liquid state.

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Contribution of particulate sulfate and organic carbon to cloud condensation nuclei in the marine atmosphere

Cited by 119 publications

References 8 publications

Marine aerosol production: a review of the current knowledge

Marine aerosol production: a review of the current knowledge

Numerical Study on Impacts of Multi-Component Aerosols on Marine Cloud Microphysical Properties

Relating hygroscopicity and optical properties to chemical composition and structure of secondary organic aerosol particles generated from the ozonolysis of α-pinene

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