Influence of sea-salt on aerosol radiative properties in the Southern Ocean marine boundary layer

Murphy, D. M.; Anderson, J. R.; Quinn, Patricia K.; McInnes, L. M.; Brechtel, Fred J.; Kreidenweis, Sonia M.; Middlebrook, A. M.; Pósfai, Mihály; Thomson, D. S.; Buseck, Peter R.

doi:10.1038/32138

Cited by 373 publications

(325 citation statements)

References 23 publications

Supporting

Mentioning

301

Contrasting

Unclassified

Order By: Relevance

“…The free tropospheric burden appears to be controlled by continental emissions, and is able to replenish the marine boundary layer with fine and ultrafine sulfate particles. The induced radiative impact over the sea surface may be of importance since these particles play an important role in solar radiation backscattering and may act as cloud condensation nuclei inducing albedo increase [Murphy et al, 1998]. …”

Section: 454 Patris Et Al' Isotopic Composition Of Sulfur In Mar1mentioning

confidence: 99%

Isotopic composition of sulfur in size‐resolved marine aerosols above the Atlantic Ocean

Patris¹,

Mihalopoulos²,

Baboukas³

et al. 2000

J. Geophys. Res.

View full text Add to dashboard Cite

Abstract. Sulfur isotope measurements were performed on size-segregated aerosols collected during the Albatross oceanographic campaign from 61øN to 35øS above the Atlantic Ocean in October and November 1996. Results obviously showed the dependence of the sulfur isotope ratio upon particle size, the finest particles being depleted in*4S compared to coarse particles, suggesting a heavier continental influence in the fine mode. In the coarse mode, 50-90% of the excess sulfate in both hemispheres was found to be of biogenic origin. In the fine mode a different picture was obtained. In the Northern Hemisphere the contribution ofbiogenic sulfur was found to be less than 35% of the excess sulfur even in relatively clean air masses. On the other hand, in the Southern Hemisphere the participation of biogenic sulfur was about 60% of the excess sulfur in purely marine air. The contribution of continental sulfur to the fine fraction in the Southern Hemisphere was up to 40 + 25% even under pure oceanic conditions and far more in the Northern Hemisphere. These results attest to the possible importance of long-range transport of fine sulfate particles or SO2, possibly through the free troposphere, or the importance of anthropogenic emissions due to shipping.

show abstract

Section: 454 Patris Et Al' Isotopic Composition Of Sulfur In Mar1mentioning

confidence: 99%

Isotopic composition of sulfur in size‐resolved marine aerosols above the Atlantic Ocean

Patris¹,

Mihalopoulos²,

Baboukas³

et al. 2000

J. Geophys. Res.

View full text Add to dashboard Cite

show abstract

“…However, during the ACE-1 campaign at Cape Grim, it was concluded from an automated SEM study of 19 640 impacted particles using EDX that more than half the particles as small as 130 nm consisted wholly of unreacted sea salt. [12] Laser mass spectrometry of single particles also showed the presence of sodium and chlorine in most particles. Laboratory studies [13,14] of sea salt production by bubbling artificial sea water also showed that sea salt particles as small as 10 nm were produced.…”

Section: Introductionmentioning

confidence: 98%

Sources, nature and influence on climate of marine airborne particles

Bigg¹

2007

Environ. Chem.

View full text Add to dashboard Cite

Environmental context. Climate models are of considerable interest to scientists and the general public given the increasing awareness of global climate change. A large uncertainty in climate models is the influence of airborne particles on the amount of sunlight that clouds reflect back to space. Since oceans comprise 70% of the Earth's surface, it is important that we gain an understanding of the factors that control the sources and nature of marine airborne particles. This work describes previously unexplored features of the marine aerosol at a clean site exposed to the Southern Ocean and its environmental importance, which will be of benefit to future climate models.Abstract. Airborne particles (aerosol) collected at Cape Grim, Tasmania, in February 2006 in baseline conditions were examined by transmission electron microscopy. Particles recognised as marine exopolymer gels, and aggregates of insoluble organic particles that have diameters of ∼40 nm, formed 9% of the particles larger than 200 nm. Once watersoluble compounds were removed by dialysis, the proportion rose to 30%. The gels and exopolymers were mainly of marine algal and bacterial origin. Their highly surface-active properties make them potentially environmentally important in the aerosol because of their ability to act as cloud condensation nuclei. The chemical constitution of particles in the 80-200-nm diameter size range is controversial, and widely varying estimates of the proportion of sea salt they contain have been published. Possible reasons for this are discussed. The present work supports the lowest estimate.

show abstract

“…These particles have important direct [Murphy et al, 1998;Quinn and Coffman, 1999;Randles et al, 2004] and indirect effects [Pierce and Adams, 2006;Woodcock, 1952] on the Earth's climate, which need to be adequately quantified to properly predict anthropogenic climate impacts. The first step in this process is the derivation of an appropriate environment-dependant SSA number source function for use in chemistry transport and climate models.…”

Section: Introductionmentioning

confidence: 99%

Effect of soluble surfactant on bubble persistence and bubble‐produced aerosol particles

et al. 2013

View full text Add to dashboard Cite

[1] The effect of soluble surfactant on the persistence of salt-water bubbles and their ability to produce aerosol particles upon bursting was investigated. Ensembles of individual, millimetric bubbles were produced in NaCl solutions of varying surfactant concentration. Aerosol production efficiency-a fundamental property of single bubbles defined as the number of particles produced per bubble film cap area-decreased by 79% to 98% following the addition of surfactant and increase in solution film pressure from 1-2 to 7-27 mN m À1 . The generated particle size distributions (0.01-10 mm dry diameter) contained up to three modes and did not change much for film pressures up to 13.8 mN m À1 . The persistence of the bubbles at the water surface and the thickness of their film caps were investigated with high-speed videography. Addition of soluble surfactant increased average bubble persistence providing more time for the bubbles to drain and thin out with the aid of marginal regeneration flows. Bubble film cap thicknesses ranged from around 1 mm for relatively clean, short-lived bubbles to less than 0.1 mm for surfactant-stabilized, persistent bubbles. The suppression of aerosol production from the surfactant-stabilized bubbles may have resulted from the dramatic thinning of their caps or reduced surface forces at high film pressure. Previously reported Sea Spray Aerosol source functions were compared to measured aerosol production efficiencies and found to be significantly greater in magnitude, suggesting that there is a source of particles from whitecaps that was not captured in these single-bubble experiments.

show abstract

Influence of sea-salt on aerosol radiative properties in the Southern Ocean marine boundary layer

Cited by 373 publications

References 23 publications

Isotopic composition of sulfur in size‐resolved marine aerosols above the Atlantic Ocean

Isotopic composition of sulfur in size‐resolved marine aerosols above the Atlantic Ocean

Sources, nature and influence on climate of marine airborne particles

Effect of soluble surfactant on bubble persistence and bubble‐produced aerosol particles

Contact Info

Product

Resources

About