Recent studies revealed layers of enhanced aerosol scattering in the upper troposphere and lower stratosphere over Asia (Asian Tropopause Aerosol Layer (ATAL)) and North America (North American Tropospheric Aerosol Layer (NATAL)). We use a sectional aerosol model (Community Aerosol and Radiation Model for Atmospheres (CARMA)) coupled with the Community Earth System Model version 1 (CESM1) to ex...

The monitoring capability of a polarized instrument (POLDER) under high aerosol loading conditions over China is investigated. The aerosol optical thickness (AOT), which infers the aerosol burden, is used to measure the satellite monitoring capabilities. AOT products retrieved from POLDER on low aerosol loading days, and products from a radiometric instrument (MODIS) on high and low aerosol loa...

The fate of aerosols in open flows is relevant in a variety of physical contexts. Previous results are consistent with the assumption that such finite-size particles always escape in open chaotic advection. Here we show that a different behavior is possible. We analyze the dynamics of aerosols both in the absence and presence of gravitational effects, and both when the dynamics of the fluid par...

Evaluation of the atmospheric significance of multiphase reactions in atmospheric secondary organic aerosol formation A. Gelencsér and Z. Varga Air Chemistry Group of the Hungarian Academy of Sciences, P.O. Box 158, H-8201 Veszprém, Hungary Department of Earth and Environmental Sciences, University of Veszprém, Egyetem u. 10, H-8200 Veszprém, Hungary Received: 4 May 2005 – Accepted: 19 May 2005...

Density changes of aerosol particles as a result of chemical reaction Y. Katrib, S. T. Martin, Y. Rudich, P. Davidovits, J. T. Jayne, and D. R. Worsnop Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, UK Department of Environmental Sciences, Weizmann Institute, Rehovot 76100, Israel Chemistry Department, Boston College, Chestnut Hill, MA 02467, USA Aerodyne...

An information content analysis for multiwavelength SYNergetic AErosol Retrieval algorithm SYNAER was performed to quantify the number of independent pieces of information that can be retrieved. In particular, the capability of SYNAER to discern various aerosol types is assessed. This information content depends on the aerosol optical depth, the surface albedo spectrum and the observation geome...

As a result of new aerosol compositional information, we have implemented an exploratory model for predicting aerosol yields from the reaction of R-pinene with ozone in the atmosphere. This new approach has the ability to embrace a range of different atmospheric chemical conditions, which bring about biogenic aerosol formation. A kinetic mechanism was used to describe the gas-phase reactions of...

The MODerate resolution Imaging Spectroradiometer (MODIS) aboard both NASA's Terra and Aqua satellites is making near global daily observations of the earth in a wide spectral range (0.41 to 15 μm). These measurements are used to derive spectral aerosol optical thickness and aerosol size parameters over both land and ocean. The aerosol products available over land include aerosol optical thickn...

Studying optical properties of atmospheric aerosol is important because aerosol affects people around the world significantly. Aerosol can directly affect climate change by scattering and absorption of solar and other radiations, and also indirectly affect the radiation by affecting cloud formation. Tropospheric aerosol is associated with air pollution and adverse health effects. These effects ...

The wavelength-dependent aerosol extinction in the 800-1250-cm(-1) region has been derived from ATMOS (atmospheric trace molecule spectroscopy) high-spectral-resolution IR transmission measurements. Using models of aerosol and cloud extinction, we have performed weighted nonlinear least-squares fitting to determine the aerosol-volume columns and vertical profiles of stratospheric sulfate aeroso...