Sentences with phrase «organic aerosol particles»

The organic aerosol particles that coat the toxic hitchhikers are wafted into the atmosphere through emissions from trees (like those that produce the smell of pine trees), and burning biomass and fossil fuel to form a semi-solid sap - like casing surrounding and protecting the particle's payload from breaking down in the atmosphere.

When isoprene is in the presence of human - made sulfate particles it transforms into atmospheric organic aerosol particles.

Shiraiwa, M., Ammann, M., Koop, T., and Pöschl, U: Gas uptake and chemical aging of semi-solid organic aerosol particles, Proceedings of the National Academy of Sciences, 108, 11003 - 11008, 2011.

Not exact matches

She decided to study the role that organic particles play in cloud droplet formation, because a large proportion of marine aerosols — which have a significant climate impact — are organics.

Xiao used battery powered aerosol monitors to measure indoor concentrations of fine particulate matter, or particles 2.5 micrometers in diameter or smaller, which consists mainly of black carbon and organic carbon.

Two important aerosol species, sulfate and organic particles, have large natural biogenic sources that depend in a highly complex fashion on environmental and ecological parameters and therefore are prone to influence by global change.

Volatility is a key property of organic aerosol because it determines the partitioning between the gas and particle phases, and thus the formation of SOA particles.

The new findings help to explain a significant part of the organic mass of aerosol particles in the air, which had remained mysterious to the scientists so far.

Shiraiwa, M., Pfrang, C., Koop, T., and Pöschl, U.: Kinetic multilayer model of gas - particle interactions in aerosols and clouds (KM - GAP): linking condensation, evaporation and chemical reactions of organics, oxidants and water, Atmospheric Chemistry and Physics, 12, 2777 - 2794, 2012.

, Kilcoyne, A.L.D., Moffet, R.C., Weigand, M., Martin, S.T., Pöschl, U., and Andreae, M.O.: Biogenic potassium salt particles as seeds for secondary organic aerosol in the Amazon, Science, 337, 1075 - 1078, 2012.

The specialized instruments onboard the aircraft sampled the plume for aerosol particle size distribution and composition as well as concentrations of pollutant gases such as sulfur dioxide, nitric oxide, nitrogen dioxide, ozone, and volatile organic compounds (VOCs).

Yet these particles, called secondary organic aerosols, are a dominant atmospheric component in most megacity locations.

Results: Today's climate models regard organic aerosols as static carbon - based molecules, but scientists at Pacific Northwest National Laboratory and the University of California, Irvine showed that the particles are very dynamic.

A large portion of secondary organic aerosols - tiny particles in the air we breathe that contribute to cloud formation and precipitation - arise from a combination of man - made pollution and molecules given off by plant matter.

CLOUD shows that organic vapours emitted by trees produce abundant aerosol particles in the atmosphere in the absence of sulphuric acid.

Additionally, stimulated bacterial degradation might heavily affect the organic composition of nascent sea - spray particles, upon which relies the ability of marine aerosols to interact with the climate system.

These have garnered more than 600 citations advancing our understanding of what the research field calls secondary organic aerosols — or SOA for short — and how the carbon - containing aerosol particles mix in the atmosphere.

Secondary organic aerosols, or SOAs, are created when hydrocarbon gases, given off by everything from pine trees to snow blowers, undergo a series of chemical reactions in the atmosphere to produce particles.

Recently, the team tackled how the particles, called secondary organic aerosols (SOAs), evaporate when the relative humidity is high.

The answer, of course, is that Pieter is talking about carbon particles (aerosols, often called black carbon) and the post is talking about carbon atoms in principally CO2, but also methane and organic volatile moleclues.

These NCA emissions directly affect particle concentrations and human exposure to nanosized aerosol in urban areas, and potentially may act as nanosized condensation nuclei for the condensation of atmospheric low - volatile organic compounds.

The Muchachas project looked at organic aerosols, which constitute the largest proportion of chemical airborne particles.

With regard to the actual content of the press release quoted, it isn't clear if the process they report on (aerosol particles, particularly organic chemicals, getting smaller over time) makes them better or worse at forming clouds and their other atmosphere cooling functions.

Kim M. J., G. A. Novak, M. C. Zoerb, M. Yang, B. W. Blomquist, B. J. Huebert, C. D. Cappa and T. H. Bertram (April 2017): Air - Sea exchange of biogenic volatile organic compounds and the impact on aerosol particle size distributions.

Topics that I work on or plan to work in the future include studies of: + missing aerosol species and sources, such as the primary oceanic aerosols and their importance on the remote marine atmosphere, the in - cloud and aerosol water aqueous formation of organic aerosols that can lead to brown carbon formation, the primary terrestrial biological particles, and the organic nitrogen + missing aerosol parameterizations, such as the effect of aerosol mixing on cloud condensation nuclei and aerosol absorption, the semi-volatility of primary organic aerosols, the importance of in - canopy processes on natural terrestrial aerosol and aerosol precursor sources, and the mineral dust iron solubility and bioavailability + the change of aerosol burden and its spatiotemporal distribution, especially with regard to its role and importance on gas - phase chemistry via photolysis rates changes and heterogeneous reactions in the atmosphere, as well as their effect on key gas - phase species like ozone + the physical and optical properties of aerosols, which affect aerosol transport, lifetime, and light scattering and absorption, with the latter being very sensitive to the vertical distribution of absorbing aerosols + aerosol - cloud interactions, which include cloud activation, the aerosol indirect effect and the impact of clouds on aerosol removal + changes on climate and feedbacks related with all these topics In order to understand the climate system as a whole, improve the aerosol representation in the GISS ModelE2 and contribute to future IPCC climate change assessments and CMIP activities, I am also interested in understanding the importance of natural and anthropogenic aerosol changes in the atmosphere on the terrestrial biosphere, the ocean and climate.

Organic aerosols are emitted as primary aerosol particles or formed as secondary aerosol particles from condensation of organic gases considered semi-volatile or having low volatility.