Sentences with phrase «organic aerosol from»

Observational evidence suggests that some organic aerosol compounds from fossil fuels are relatively weakly absorbing but do absorb solar radiation at some ultraviolet and visible wavelengths (e.g., Bond et al., 1999; Jacobson, 1999; Bond, 2001) although organic aerosol from high - temperature combustion such as fossil fuel burning (Dubovik et al., 1998; Kirchstetter et al., 2004) appears less absorbing than from low - temperature combustion such as open biomass burning.

BC FF is for black carbon from fossil fuel and biofuel, POA FF is for primary organic aerosol from fossil fuel and biofuel, BB is for biomass burning aerosols and SOA is for secondary organic aerosols.»

The team injected citric, adipic, and fulvic acid into the chamber as seed aerosols, and then introduced a secondary organic aerosol from α - pinene, a carbon - containing compound derived from pine trees.

Song and fellow researchers published research in 2007 that addressed assumptions in the ability of diesel exhaust organic aerosols to mix with organic aerosols from tree evaporate.

How do organic aerosols from biomass burning, which you can see in the red dots, intersect with clouds and rainfall patterns?

Not exact matches

The results imply that the interaction between organic and sulfuric acids promotes efficient formation of organic and sulfate aerosols in the polluted atmosphere because of emissions from burning of fossil fuels, which strongly affect human health and global climate.

Along the PlaetSolar itinerary, the colored dots represent the concentration of organic aerosols, from blue (light concentration) to red (strong concentration).

A study published April 7 in PNAS Online Early Edition describes how a team of scientists, including researchers from the University of California, Davis, showed that vapor losses to the walls of laboratory chambers can suppress the formation of secondary organic aerosol, which in turn has contributed to the underprediction of SOA in climate and air quality models.

Even though open windows bring in more ozone from outside, the reduction in the indoor limonene concentration and SOA formation strength more than make up for it, as less secondary organic aerosol is formed inside.

The cooling effect of aerosols can partly offset global warming on a short - term basis, but many are made of organic material that comes from sources that scientists don't fully understand, said Joost de Gouw, a research physicist at NOAA's Earth System Research Laboratory in Boulder, Colo., who is unaffiliated with the studies.

Tar sands study co-author Shao - Meng Li, a senior research scientist at Environment and Climate Change Canada, said that in highly - polluted regions, some organic aerosols can prevent clouds from forming.

Further investigation showed that Titan's atmosphere has organic aerosols, called tholins, that likely formed from molecules such as methane and nitrogen.

The team evaluated simulated cloud fields from the multi-scale aerosol - climate model and examined how specific human - caused aerosols, such as sulfate, black carbon (soot), and organic carbon affect those clouds and, in turn, the climate.

However, to make climate models more accurate, we are focused on developing a better understanding of the dynamics of organic aerosols formed from plant - based organic vapors and their interaction with aerosols emitted from human activities,» said Dr. Chen Song, a PNNL atmospheric scientist.

The PNNL study measured how, in the atmosphere, these aerosols interact with and mix with other volatile or semi-volatile organic compounds, the carbon - centric chemicals that evaporate from both natural and human - made sources.

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.

The CARES field campaign was designed to increase scientific knowledge about the evolution of black carbon, primary organic aerosols (POA), and secondary organic aerosols (SOA) from both human - caused and natural (biogenic) sources.

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.

Analyses of the ground and aircraft data performed by Setyan et al. (2012), Shilling et al. (2013), and Kleinman et al. (2016) showed that organic aerosol production increased when human - caused emissions from Sacramento mixed with air rich in isoprene, an organic compound wafting from many plants that originate in the area's foothills.

Secondary organic aerosols are formed through complex physical and chemical interactions between pre-existing aerosols in the atmosphere and trace organic gases emitted from both human - caused and natural sources.

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.

Aside from aerosol solutions, and ocean clouds a la Latham and Salter, I think an essential will be capturing waste organics (mostly farm debris, corn stalks etc.) and sequestering them in the deep ocean (not as CO2; just drop bales; much cheaper and efficient).

In reality, there are a host of both natural and anthropogenic aerosols, ranging from sea salt (the major source of cloud nuclei over the ocean) to biogenic aerosols from forests (the «smoke» of the Great Smoky Mountains of the Eastern US) to partially burnt organic materials (the «brown cloud» over Asia, generally absorptive / warming) to various sulfur compounds (generally reflective / cooling).

Direct radiative feedback due to biogenic secondary organic aerosol estimated from boreal forest site observations.

Formation of nitrogen - and sulfur - containing light - absorbing compounds accelerated by evaporation of water from secondary organic aerosols

However, because of its acidity, H2SO4 (and potentially MSA) can enhance the formation and growth of secondary organic aerosol (SOA) from organic compounds (5, 44, 45), including those produced by homogeneous nucleation of low - volatility species (46).

PACific Dust EXperiment «The long range transport of dust and anthropogenic aerosols (e.g, black carbon, organics and sulfates, and air pollution from Eurasia, across the Pacific Ocean, into North America is one of the most wide spread and major pollution events on the planet.

Effect of pellet boiler exhaust on secondary organic aerosol formation from α - pinene.

New evidence shows that the ocean also acts as a source of organic matter from biogenic origin -LSB-...] Surface - active organic matter of biogenic origin -LSB-...] enriched in the oceanic surface layer and transferred to the atmosphere by bubble - bursting processes, are the most likely candidates to contribute to the observed organic fraction in marine aerosol.

There is one aspect of climate change that is not fully established: the role of aerosol pollution (aka global dimming) from mainly from sulfates and soot (black carbon and organic carbon).

New information from dedicated recent and future field campaigns is expected to shed light on organic aerosol formation processes and how they are altered in the presence of anthropogenic pollution.

The successful candidate will study secondary organic aerosol (SOA) formation from the oxidation of biogenic volatile organic compounds (VOCs).

PNNL scientists found that secondary organic aerosols formed in the presence of the toxic pollutant known as polycyclic aromatic hydrocarbons (PAHs) trapped the PAH molecules inside, shielding them from degradation.

Natural aerosols — bits of dust, salt, smoke, and organic compounds emitted from plants — are an integral part of our planet's atmosphere.

Historical emissions of black and organic carbon aerosol from energy - related combustion, 1850 — 2000.

Such forcings include greenhouse gases, volcanoes, solar activity and air pollution — for example, aerosols from coal burning, smog and volatile organics.

This information is synthesized to provide a continuous analysis of the flow from the emitted material to the atmosphere up to the point of the climate impact of the produced organic aerosol.

My studies range from detailed aerosol processes such as the formation of secondary organic aerosols (SOA), to centennial time scale climate variability related to natural variability and external forcings.

Many of the modelling studies performed since the TAR have investigated the RF of organic carbon aerosols from both fossil fuel and biomass burning aerosols, and the combined RF of both components.

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.