A sunphotometer from AERONET network and a multiwavelength LIDAR system were employed to obtain the diurnal aerosol optical thickness from UV up to the near IR spectral region.Tropospheric aerosol optical properties were measured at the same time by two collocated systems at CEILAP in the Buenos Aires suburbs. Aerosol profiling capabilities from the LIDAR were reinforced by the use of the sunph...

Evaluation of the MERIS aerosol product over land with AERONET J. Vidot , R. Santer, and O. Aznay Atmospheric and Oceanic Sciences Department, University of Wisconsin, Madison, USA Laboratoire Interdisciplinaire des Sciences de l’Environnement, Maison de la Recherche en Environnement Naturel, Université du Littoral Cote d’Opale, Wimereux, France now at: Lab. de Météorologie Physique, Université...

In spring 2006, biomass burning aerosols from eastern Europe were transported extensively to Finland, and to other parts of northern Europe. They were observed as far as in the European Arctic. In the first part of this paper, temporal and spatial evolution and transport of these biomass burning aerosols are monitored with MODIS retrieved aerosol optical depth (AOD) imagery at visible wavelengt...

We examine the impact of atmospheric correction, specifically aerosol model selection, on retrieval of bio-optical properties from satellite ocean color imagery. Uncertainties in retrievals of bio-optical properties (such as chlorophyll, absorption, and backscattering coefficients) from satellite ocean color imagery are related to a variety of factors, including errors associated with sensor ca...

This study demonstrates the feasibility of small satellite, namely PROBA platform with the compact high resolution imaging spectrometer (CHRIS), for aerosol retrieval in Hong Kong. The rationale of our technique is to estimate the aerosol reflectances by decomposing the Top of Atmosphere (TOA) reflectances from surface reflectance and Rayleigh path reflectances. For the determination of surface...

Aerosol spectral measurements by sunphotometers can be characterized by three independent pieces of information: 1) the optical thickness (AOT), a measure of the column aerosol concentration, 2) the optical thickness average spectral dependence, given by the Angstrom exponent (α), and 3) the spectral curvature of α (δα). We propose a simple graphical method to visually convert (α, δα) to the co...

In this work, the effect of aerosol vertical distribution on local shortwave radiative forcing is studied. We computed at top and bottom atmosphere between 0.2 4 microns using libRadTran package compared results with those provided by AERONET (AErosol RObotic NETwork). Lidar measurements were employed to characterize profile, collocated optical parameters required calculate its forcing. A good ...

The potential of Landsat data processing to provide systematic continental scale products has been demonstrated by several projects including the NASA Webenabled Landsat Data (WELD) project. The recent free availability of Landsat data increases the need for robust and efficient atmospheric correction algorithms. This study compares the accuracy of two Landsat atmospheric correction methods: a ...

[1] With the launch of the MODIS sensor on the Terra spacecraft, new data sets of the global distribution and properties of aerosol are being retrieved, and need to be validated and analyzed. A system has been put in place to generate spatial statistics (mean, standard deviation, direction and rate of spatial variation, and spatial correlation coefficient) of the MODIS aerosol parameters over m...

Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Smoke aerosols from biomass burning are an important component of the global aerosol cycle. Analysis of Aerosol Robotic Network (AERONET) retrievals of size distribution and refractive index reveals variet...