Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer J. D. Allan, M. R. Alfarra, K. N. Bower, H. Coe, J. T. Jayne, D. R. Worsnop, P. P. Aalto, M. Kulmala, T. Hyötyläinen, F. Cavalli, and A. Laaksonen School of Earth, Atmospheric & Environmental Science, University of Manchester, UK Distribu...

Coordinated observational data of atmospheric aerosols were collected over a 24-h period between 2300 mountain daylight time (MDT) on 27 August 2009 and 2300 MDT on 28 August 2009 at Bozeman, Montana (45.668N, 111.048W, elevation 1530 m) using a collocated two-color lidar, a diode-laser-based water vapor differential absorption lidar (DIAL), a solar radiometer, and a ground-based nephelometer. ...

Atmospheric components (aerosols and molecules) scatter and absorb solar radiation. They significantly influence the contrast and apparent resolution of satellite images of the Earth’s surface taken in the visible and near infrared spectral channels. For accurate interpretation of satellite signals, remote sensing data have to be corrected for atmospheric effects. This requires knowledge of atm...

Atmospheric oxidation of biogenic hydrocarbons, such as monoterpenes, i estimated to be a significant source of global aerosol. Whereas laboratory studies have established that photochemical oxidation of monoterpenes leads to aerosol formation, there are limited field studies detecting such oxidation products in ambient aerosols. Drawing on prior results of monoterpene product analysis under co...

The aerosol models in MODTRAN are discussed. The focus in this report is on the boundary layer aerosol. The second part of the report outlines the major results of aircraft measurements of atmospheric aerosol obtained around Jabiru, N.T., in June and September 2003. These measurements are used to obtain theoretical multimode size distribution functions. The chemistry composition measurements ar...

Atmospheric aerosol particles influence global climate as well as impair air quality through their effects on atmospheric visibility and human health. Ultrafine (<100 nm) particles often dominate aerosol numbers, and nucleation of atmospheric vapors is an important source of these particles. To have climatic relevance, however, the freshly nucleated particles need to grow in size. We combine ob...

The present research article highlights the metal (Cd, Cu, Pb, Zn and Fe)distribution pattern in the RSPM generated in different hot spot sites located at Kochi, theQueen of Arabian Sea. These sampling sites are categorized under three different zonesas estuarine, riverine, and coastal. Two sampling phases are selected in order to check theconsistency in pollution trend after a two year gap and...

The effects of atmospheric aerosol on climate forcing may be very substantial but are quantified poorly at present; in particular, the effects of aerosols on cloud radiative properties, or the “indirect effects” are credited with the greatest range of uncertainty amongst the known causes of radiative forcing. This manuscript explores the effects that the composition and properties of atmospheri...

Atmospheric aerosol is comprised of distinct multicomponent particles that are continuously modified as they are transported in the atmosphere. Resolving variability in particle physical and chemical properties requires tracking high-dimensional probability density functions, which is not practical in large-scale atmospheric simulations. Reduced representations of atmospheric aerosols are neede...

In order to investigate the aerosol variability over the southwest region of Slovenia, an ultraviolet scanning elastic backscatter LiDAR was utilized to make the vertical scan for atmospheric probing. With the assumption of horizontal atmospheric homogeneity, aerosol optical variables were retrieved from the horizontal pixel data points of two-dimensional range-height-indicator (RHI) diagrams b...