A combined organic‐inorganic sea‐spray source function

O’Dowd, Colin; Langmann, Bärbel; Varghese, Saji; Scannell, Claire; Čeburnis, Darius; Facchini, M. C.

doi:10.1029/2007gl030331

Cited by 208 publications

(233 citation statements)

References 19 publications

(27 reference statements)

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“…During winter the highest concentrations are determined over Eastern Europe due to domestic heating. Even higher POC concentrations are found during summer in the marine boundary layer where POC is released together with sea salt -both in the accumulation mode -dependent on wind speed (O'Dowd et al, 2008). This source of POC has not been taken into account before.…”

Section: Carbonaceous Aerosolsmentioning

confidence: 95%

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Aerosol distribution over Europe: a model evaluation study with detailed aerosol microphysics

et al. 2008

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Abstract. This paper summarizes an evaluation of model simulations with a regional scale atmospheric climatechemistry/aerosol model called REMOTE, which has been extended by a microphysical aerosol module. Model results over Europe are presented and compared with available measurements in surface air focusing on the European distribution and variability of primary and secondary aerosols. Additionally, model results obtained with detailed aerosol microphysics are compared to those based on an aerosol bulk mass approach revealing the impact of dry deposition fluxes on atmospheric burden concentration. An improved determination of elevated ozone and sulfate concentrations could be achieved by considering a diurnal cycle in the anthropogenic emission fluxes. Deviation between modelled and measured organic carbon concentrations can be mainly explained by missing formation of secondary organic aerosols and deficiencies in emission data. Changing residential heating practices in Europe, where the use of wood is no longer restricted to rural areas, need to be considered in emission inventories as well as vegetation fire emissions which present a dominant source of organic carbon.

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Section: Carbonaceous Aerosolsmentioning

confidence: 95%

“…-Considerable OC concentrations are determined in the marine boundary layer during summer when POC is released together with sea salt -both in the accumulation mode -dependent on wind speed (O'Dowd et al, 2008). This source of POC has not been taken into account before.…”

Section: Discussionmentioning

confidence: 99%

Aerosol distribution over Europe: a model evaluation study with detailed aerosol microphysics

et al. 2008

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“…Recent studies suggest that a fraction of submicron sea spray may be organic, rather than pure salt. Although mixed organic/salt flux parameterisations have been constructed from observations in one ocean [O'Dowd et al, 2008], it is not known to what extent the dependence of flux on wind speed will depend on the variable organic content, nor how the organic fraction varies in different oceans. We therefore restrict our study to the Mårtensson scheme for pure salt, which has been shown to agree well with size distribution measurements south of 45°S [ Pierce and Adams, 2006].…”

Section: Methodsmentioning

confidence: 99%

Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds

Korhonen

Carslaw

Forster

et al. 2010

Geophysical Research Letters

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[1] Observations indicate that the westerly jet in the Southern Hemisphere troposphere is accelerating. Using a global aerosol model we estimate that the increase in wind speed of 0.45 ± 0.2 m s À1 decade À1 at 50-65°S since the early 1980s caused a higher sea spray flux, resulting in an increase of cloud condensation nucleus concentrations of more than 85% in some regions, and of 22% on average between 50 and 65°S. These fractional increases are similar in magnitude to the decreases over many northern hemisphere land areas due to changes in air pollution over the same period. The change in cloud drop concentrations causes an increase in cloud reflectivity and a summertime radiative forcing between at 50 and 65°S comparable in magnitude but acting against that from greenhouse gas forcing over the same time period, and thus represents a substantial negative climate feedback. However, recovery of Antarctic ozone depletion in the next two decades will likely cause a fall in wind speeds, a decrease in cloud drop concentration and a correspondingly weaker cloud feedback. Citation: Korhonen, H., K. S. Carslaw, P. M.Forster, S. Mikkonen, N. D. Gordon, and H. Kokkola (2010), Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds, Geophys. Res. Lett.,

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“…Marine aerosol consists of sea salt, primary organics from surface films and secondary sulfate aerosols produced from DMS released by phytoplankton [52,53]. Emission fluxes of primary marine aerosol species depend predominantly on surface wind speeds.…”

Section: Marine Aerosolmentioning

confidence: 99%

Climate Feedback on Aerosol Emission and Atmospheric Concentrations

Tegen

Schepanski

2018

Curr Clim Change Rep

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Purpose of Review Climate factors may considerably impact on natural aerosol emissions and atmospheric distributions. The interdependencies of processes within the aerosol-climate system may thus cause climate feedbacks that need to be understood. Recent findings on various major climate impacts on aerosol distributions are summarized in this review. Recent Findings While generally atmospheric aerosol distributions are influenced by changes in precipitation, atmospheric mixing, and ventilation due to circulation changes, emissions from natural aerosol sources strongly depend on climate factors like wind speed, temperature, and vegetation. Aerosol sources affected by climate are desert sources of mineral dust, marine aerosol sources, and vegetation sources of biomass burning aerosol and biogenic volatile organic gases that are precursors for secondary aerosol formation. Different climate impacts on aerosol distributions may offset each other. Summary In regions where anthropogenic aerosol loads decrease, the impacts of climate on natural aerosol variabilities will increase. Detailed knowledge of processes controlling aerosol concentrations is required for credible future projections of aerosol distributions.

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A combined organic‐inorganic sea‐spray source function

Cited by 208 publications

References 19 publications

Aerosol distribution over Europe: a model evaluation study with detailed aerosol microphysics

Aerosol distribution over Europe: a model evaluation study with detailed aerosol microphysics

Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds

Climate Feedback on Aerosol Emission and Atmospheric Concentrations

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