Sentences with phrase «aerosol particle size»

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.

This method uses consistency between direct normal and diffuse horizontal measurements together with a special regression technique for retrieval of daily time series of column mean aerosol particle size, aerosol optical depth, NO2, ozone and water vapor column amounts together with the instrument's calibration constants.

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).

Not exact matches

Aerosol particles have different sizes, as well as chemical and physical properties, all of which determine their climate effects.

The researchers have developed a kit of new tools including an instrument the size of a cigar box that uses a laser to detect the tiny aerosol particles.

Over land, the small size of these aerosol particles tends to suppress rainfall because the water droplets that condense on them are light enough to remain aloft.

Until recently, the U.S. Department of Homeland Security has been investigating whether seeding storm clouds with pollution - size aerosols (particles suspended in gas) might help slow tropical cyclones.

Plants release gases that, after atmospheric oxidation, tend to stick to aerosol particles, growing them into the larger - sized particles that reflect sunlight and also serve as the basis for cloud droplets.

«The major challenge of this method is accurately determining the size of the core and shell of the aerosol particles.

What's more, according to Tim Bates of the National Oceanic and Atmospheric Administration (NOAA), «there's a very wide range of sizes [for aerosol particles], and the effect that the particle is going to have on climate is going to be very dependent on its size, which makes it trickier.»

Mike Alexander, Alex Laskin, Yuri Desyaterik, and John Ortega, who work at DOE's Environmental Molecular Sciences Laboratory (EMSL) at PNNL and Xiao - ying Yu of PNNL's Atmospheric Science and Global Change Division, collected an extensive set of measurements of aerosol mass, size distribution, composition, and particle morphology using an array of in - situ techniques and aerosol sampling approaches.

In general, the risk of aerosol transmission increases with proximity and duration of exposure to the source; however, once aerosolized, certain pathogens may remain infective over long distances, depending on particle size, the nature of the pathogen, and such environmental factors as temperature and humidity.3

We must remember that are a number of aerosol sources that produce particles of this size (about 100 nm or 0.1 micron), including anthropogenic ones.

A paper discussing the difficulty of getting from nm sized nucleation mode to a size that can generate cloud particles is: Erupe, M. E., et al. (2010), Correlation of aerosol nucleation rate with sulfuric acid and ammonia in Kent, Ohio: An atmospheric observation, J. Geophys.

After each of these eruptions we have noted the presence of (generally) submicrometer - sized ash particles and aerosol droplets on collectors, although we can not always be certain of the identity of the volcano responsible for the material.

Aerosol size distribution measurements at four Nordic field stations: identification, analysis and trajectory analysis of new particle formation bursts.

It is shown that such photopolarimetric data are highly sensitive to the size distribution and refractive index of aerosol particles, which reduces the nonuniqueness in aerosol retrievals using such data as compared with less comprehensive datasets.

Rasch P.J., Crutzen P.J., Coleman D.B. (2008): Exploring the climate engineering of climate using stratospheric sulphate aerosols: The role of particle size.

Coupling these new measurements with detailed cloud simulations that resolve the size distributions of aerosols and cloud particles, we found several lines of evidence indicating that most anvil crystals form on mid-tropospheric rather than boundary - layer aerosols.

The index of refraction and an average size of the aerosol particles formed are close to those characteristic of the natural stratospheric aerosol.

The temperature «forcing» of volcanic aerosols is a complicated function of latitude, altitude, season, and particle size; see Kelly et al. [20].

Aerosols A suspension of airborne solid or liquid particles, with a typical size between a few nanometres and 10 μm that reside in the atmosphere for at least several hours.

The size and concentration of aerosol particles is also of great importance for the number of cloud drops, which in turn influences the reflection characteristics of clouds.

While the standard suit of instruments deployed at the ground site (Eastern North Atlantic, ENA) can measure particle sizes between 2.5 nm and 1 um (using the Scanning Mobility Particle Sizer, SMPS and the Ultra-High Sensitivity Aerosol Spectrometer, UHSAS), there is still a need to measure larger paparticle sizes between 2.5 nm and 1 um (using the Scanning Mobility Particle Sizer, SMPS and the Ultra-High Sensitivity Aerosol Spectrometer, UHSAS), there is still a need to measure larger paParticle Sizer, SMPS and the Ultra-High Sensitivity Aerosol Spectrometer, UHSAS), there is still a need to measure larger particles.

The Ultra-High-Sensitivity Aerosol Spectrometer (UHSAS) is an optical - scattering, laser - based aerosol particle spectrometer system for sizing particles in the 60 to 1000 nanometer (nm) range [1 &mdaAerosol Spectrometer (UHSAS) is an optical - scattering, laser - based aerosol particle spectrometer system for sizing particles in the 60 to 1000 nanometer (nm) range [1 &mdaaerosol particle spectrometer system for sizing particles in the 60 to 1000 nanometer (nm) range [1 — 3].

Aerosols - A collection of airborne solid or liquid particles, with a typical size between 0.01 and 10 micrometer (~ 0.00000039 and ~ 0.00039 inch) that reside in the atmosphere for at least several hours.

Size - resolved chemical composition of aerosol particles during a monsoonal transition period over the Indian Ocean.

Fridlind, A.M., and M.Z. Jacobson, 2003: Point and column aerosol radiative closure during ACE 1: Effects of particle shape and size.

The mass of a freshly nucleated aerosol particle is more than 100,000 times smaller than that of an «aged» aerosol of a size optimal to affect climate.

For atmospheric aerosol, this shape factor is usually not strongly different from one; its effect is usually assumed negligible compared to the effect of particle size, which covers several orders of magnitude.