Title of Dissertation: A STUDY OF REMOTELY SENSED AEROSOL PROPERTIES FROM GROUNDBASED SUN AND SKY SCANNING RADIOMETERS David M. Giles, Doctor of Philosophy, 2012 Directed By: Professor Russell R. Dickerson and Professor Anne M. Thompson, Department of Atmospheric and Oceanic Science Aerosol particles impact human health by degrading air quality and affect climate by heating or cooling the atmos...

Although it is believed that organic aerosols play a key role in cloud nucleation and make an Ž . important contribution to the cloud condensation nuclei CCN population, their specific species Ž remain poorly characterized. This paper reviews the current knowledge of organic acids mainly . formic, acetic, pyruvic and oxalic acids . Without specification, organic acids in this paper refer to the...

Estimation of Direct Climate Forcing (DCF) due to aerosols in cloudy areas has historically been a difficult task, mainly because of a lack of appropriate measurements. Recently, passive remote sensing instruments have been developed that have the potential to retrieve both cloud and aerosol properties using polarimetric, multiple view angle, and multi spectral observations, and therefore deter...

A modal aerosol module (MAM) has been developed for the Community Atmosphere Model version 5 (CAM5), the atmospheric component of the Community Earth System Model version 1 (CESM1). MAM is capable of simulating the aerosol size distribution and both internal and external mixing between aerosol components, treating numerous complicated aerosol processes and aerosol physical, chemical and optical...

Evaluation of the forcing of climate by aerosol scattering of shortwave radiation in cloud-free conditions (direct aerosol forcing) requires knowledge of aerosol optical properties on relevant spatial and temporal scales. It is convenient to measure these properties at the surface. However, before these measurements can be used to quantitatively estimate direct climate forcing, it is necessary ...

Aerosol detection and monitoring by satellite observations has been substantially developed over the past decades. While several state-of-the-art aerosol retrieval techniques provide aerosol properties at global scale, high spatial detail that is suitable for urbanized regions is unavailable because most of the satellite-based products are at coarse resolution. A refined aerosol retrieval algor...

This letter describes the first application of the in a 3-D chemical transformation and transport model. The QMOM simultaneously tracks an arbitrary (even) number of moments of a particle size distribution directly in space and time without the need for explicitly representing the distribution itself. The host 3-D model, the Global Chemistry Model driven by Observation-derived meteorological da...

The long-term goal of this project is to predict the radiative properties of the marine atmosphere based on aerosol and cloud properties. OBJECTIVES The objective of the project is to improve our understanding of the role of aerosols in the Marine Boundary Layer and our ability to simulate marine stratocumulus clouds as a function of aerosol properties and the large-scale meterology. APPROACH T...

[1] Aerosol optical properties that include the extinction coefficient, single scattering albedo, and asymmetry factor are needed to calculate the radiative effects of aerosols. However, measurements of these properties are typically limited to a few wavelengths, and direct measurements of the asymmetry factor are not available. We describe and evaluate a retrieval methodology that uses commonl...