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Through his close relationship with the woods of Walden Pond in Concord, Massachusetts, Henry David Thoreau observed the ebb and flow of the natural world first-hand. Prolific in his practice of colle...
Development of a measurement platformon a light airplane and analysis of airborne measurementsin the atmospheric boundary layer
light airplane measurements atmospheric dynamics kinematic GPS positioning Kriging
2015/9/16
In the present paper we provide an overview of a long term research project aimed at setting up a suitable platform
for measurements in the atmospheric boundary layer on a light airplane along with s...
Glyoxal vertical columns from GOME-2 backscattered light measurements and comparisons with a global model
GOME-2 backscattered light measurements a global model
2010/12/28
Glyoxal vertical column densities have been retrieved from nadir backscattered radiances measured from 2007 to 2009 by the spaceborne GOME-2/METOP-A sensor. The retrieval algorithm is based on the DOA...
Absorption of radiation by ice is extremely weak at visible and near-ultraviolet wavelengths, so small amounts of light-absorbing impurities in snow can dominate the absorption of solar radiation at t...
Sources of light-absorbing aerosol in arctic snow and their seasonal variation
light-absorbing aerosol arctic snow seasonal variation
2010/11/30
Two data sets consisting of measurements of light absorbing aerosols (LAA) in arctic snow together with suites of other corresponding chemical constituents are presented; the first from Siberia, Green...
Numerically exact computation of the optical properties of light absorbing carbon aggregates for wavelength of 200 nm–12.2 μm
the optical properties light absorbing carbon wavelength of 200 nm–12.2 μm
2010/9/21
The optical properties of externally mixed light absorbing carbon (LAC) aggregates are computed over the spectral range from 200 nm–12.2 μm by use of the numerically exact superposition T-matrix metho...
The contribution of anthropogenic aerosols to aerosol light-scattering and CCN activity in the California coastal zone
anthropogenic aerosols aerosol light-scattering CCN activity the California coastal zone
2010/8/16
Aircraft-based measurements of aerosol light-scattering coefficient, cloud condensation nuclei (CCN) measured directly or by proxy, and aerosol chemical composition are reported for three different ye...
Water-Soluble Organic Aerosol material and the light-absorption characteristics of aqueous extracts measured over the Southeastern United States
Water-Soluble Organic Aerosol material the light-absorption characteristics aqueous extracts the Southeastern United States
2010/8/13
Light absorption of fine particle (PM2.5) aqueous extracts between wavelengths of 200 and 800 nm were investigated from two data sets: 24-h Federal Reference Method (FRM) filter extracts from 15 South...
Size distributions of elemental carbon and its contribution to light extinction in urban and rural locations in the pearl river delta region, China
elemental carbon extinction urban and rural locations the pearl river delta region
2010/8/13
Elemental carbon (EC) in size-segregated aerosol samples were determined at five urban, one suburban, and one rural locations in the Pearl River Delta region in South China during 2006–2008 period. Th...
Impact of brown and clear carbon on light absorption enhancement, single scatter albedo and absorption wavelength dependence of black carbon
brown and clear carbon light absorption enhancement single scatter albedo black carbon
2010/8/12
The presence of clear coatings on atmospheric black carbon (BC) particles is known to enhance the magnitude of light absorption by the BC cores. Based on calculations using core/shell Mie theory, we d...
Technical Note: Using a high finesse optical resonator to provide a long light path for differential optical absorption spectroscopy: CE-DOAS
a high finesse optical resonator differential optical absorption spectroscopy CE-DOAS
2010/8/12
Cavity enhanced methods in absorption spectroscopy have seen a considerable increase in popularity during the past decade. Especially Cavity Enhanced Absorption Spectroscopy (CEAS) established itself ...
Effects of relative humidity on aerosol light scattering in the Arctic
relative humidity aerosol light the Arctic
2010/8/12
Aerosol particles experience hygroscopic growth in the ambient atmosphere. Their optical properties – especially the aerosol light scattering – are therefore strongly dependent on the ambient relative...
Pressure dependence of the deuterium isotope effect in the photolysis of formaldehyde by ultraviolet light
the deuterium isotope effect the photolysis of formaldehyde ultraviolet light
2010/8/12
The pressure dependence of the relative photolysis rate of HCHO vs. HCDO has been investigated for the first time, using a photochemical reactor at the University of Copenhagen. The dissociation of HC...
One conceivable mechanism of UV-light induced SO2 Oxidation to H2SO4
One conceivable mechanism of UV-light SO2 Oxidation to H2SO4
2010/8/12
The electron-excited chemistry of sulfur dioxide oxidation induced by UV irradiation of air with trace O3 and SO2 is considered. The importance of this mechanism is evaluated based on recent laborator...
Correlation between Light Intensity and Ozone Formation for Photochemical Smog in Urban Air of Seoul
Ozone production rate Light intensity Photooxidation Twin smog chambers Urban air
2016/3/29
Urban residents are exposed to high levels of ozone that are produced by photochemical reactions of ambient air in
strong sunlight. The potential for ozone formation of urban air needs to be characte...