In the present study, the impact of aerosols on the photochemistry in Mexico City is evaluated using the WRFCHEM model for the period from 24 to 29 March during the MCMA-2006/MILAGRO campaign. An aerosol radiative module has been developed with detailed consideration of aerosol size, composition, and mixing. The module has been coupled into the WRF-CHEM model to calculate the aerosol optical pr...

One of the major uncertainties in the understanding of Earth’s climate system is the interaction between solar radiation and aerosols in the atmosphere. Aerosols exposed to high humidity will change their chemical, physical, and optical properties due to their increased water content. To model hydrated aerosols, atmospheric chemistry and climate models often use the volume weighted mixing rule ...

Aerosol Retrieval Using Remote-sensed Observations by Yueqing Wang Doctor of Philosophy in Statistics with the Designated Emphasis in Communication, Computation, and Statistics University of California, Berkeley Professor Bin Yu, Chair Atmospheric aerosols are solid particles and liquid droplets that are usually smaller than the diameter of a human hair. They can be found drifting in the air in...

The equilibrium response of atmospheric circulation to the direct radiative effects of natural or anthropogenic aerosols is investigated using the Community Atmosphere Model (CAM3) coupled to two different ocean boundary conditions: prescribed climatological sea surface temperatures (SSTs) and a slab ocean model. Anthropogenic and natural aerosols significantly affect the circulation but in nea...

Several therapeutic effects including hypnotic, antispasmodic, treatment of abdominal and chest pain and strengthening the heart have been described for the flowers of Rosa damascena. North American Indian tribes use a decoction of the roots obtained from the Rosa damascena plant as a cough remedy and to treat eye problem. Therefore, in the present study the antitussive effect of this plant in ...

Atmospheric aerosols, an important component of the atmosphere, are derived from a variety of sources (natural and anthropogenic) and comprise of wide-range of particles having different chemical composition, size (0.001 μm to 100 μm), shape and optical properties. They are mainly confined to the lower troposphere wherein intense vertical and horizontal mixing takes place. As a consequence, lar...

Because industrial emissions of anthropogenic aerosols over East Asia have greatly increased in recent decades, the interactions between atmospheric aerosols and the East Asian summer monsoon (EASM) have attracted enormous attention. To further understand the aerosol-EASM interaction, we investigate the impacts of anthropogenic aerosols on the EASM during the multidecadal strong (1950–1977) and...

Aerosol is becoming a central theme in the climate research arena, due to many new findings concerning their significant direct and indirect effects on climate (e.g. by altering temperature, cloud, radiation and precipitation) and to the large uncertainties in our estimates of aerosol forcing on climate. Despite the large loading and complex properties of East Asian aerosols, our knowledge of t...

Each year more than 100Tg of smoke aerosols are released into the atmosphere from biomass burning out of which 80% is in the tropical regions (Hao and Liu, 1994). These aerosols affect the radiative energy balance of the earthatmosphere system both on regional and global scales. Satellite remote sensing plays a key role in biomass burning research by identifying fire sources and the spatial dis...

BACKGROUND Pseudomonas aeruginosa is the most common bacterial pathogen in patients with cystic fibrosis (CF). Current infection control guidelines aim to prevent transmission via contact and respiratory droplet routes and do not consider the possibility of airborne transmission. It was hypothesised that subjects with CF produce viable respirable bacterial aerosols with coughing. METHODS A cr...