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The state of earth’s climate is constrained by well-known physical principles such as energy balance and the conservation of energy. Increased greenhouse gas concentrations affect the atmospheric opti...
The effect of fatty acid surfactants on the uptake of ozone to aqueous halogenide particles
fatty acid surfactants ozone aqueous halogenide particles
2010/12/20
The reactive uptake of ozone to deliquesced potassium iodide aerosol particles coated with linear saturated fatty acids (C9, C12, C15, C18 and C20) was studied. The experiments were performed in an ae...
A critical look at spatial scale choices in satellite-based aerosol indirect effect studies
spatial scale choices satellite-based aerosol indirect effect studies
2010/12/20
Analysing satellite datasets over large regions may introduce spurious relationships between aerosol and cloud properties due to spatial variations in aerosol type, cloud regime and synoptic regime cl...
The invigoration of deep convective clouds over the Atlantic: aerosol effect, meteorology or retrieval artifact?
deep convective clouds the Atlantic aerosol effect meteorology retrieval artifact
2010/9/21
Associations between cloud properties and aerosol loading are frequently observed in products derived from satellite measurements. These observed trends between clouds and aerosol optical depth sugges...
Studying an effect of salt powder seeding used for precipitation enhancement from convective clouds
salt powder seeding precipitation enhancement convective clouds
2010/9/1
Experimental and theoretical studies of cloud microstructure modification with hygroscopic particles for obtaining additional precipitation amounts from convective clouds are performed. The experiment...
In addition to microphysical changes in clouds, changes in nucleation processes of ice cloud due to aerosols would result in substantial changes in cloud top temperature as mildly supercooled clouds a...
Dust aerosol effect on semi-arid climate over Northwest China detected from A-Train satellite measurements
Dust aerosol effect semi-arid climate Northwest China A-Train satellite measurements
2010/8/16
The impact of dust aerosols on the semi-arid climate of Northwest China is analyzed by comparing aerosol and cloud properties derived over the China semi-arid region (hereafter, CSR) and the United St...
The effect of reported high-velocity small raindrops on inferred drop size distributions and derived power laws
reported high-velocity small raindrops inferred drop size distributions derived power laws
2010/8/16
It has recently been shown that at high rainfall intensities, small raindrops may fall with much larger velocities than would be expected from their diameters. These were argued to be fragments of rec...
Theoretical implication of reversals of the ozone weekend effect systematically observed in Japan
the ozone weekend effect Japan
2010/8/16
Systematic changes of the ozone weekend effect are found over broad areas of Japan. These changes are characterized by (1) spatial reversals from a weekend increase in the vicinity of huge precursor s...
Isotope effect in the formation of H2 from H2CO studied at the atmospheric simulation chamber SAPHIR
Isotope effect the formation of H2 from H2CO the atmospheric simulation chamber SAPHIR
2010/8/13
Formaldehyde of known, near-natural isotopic composition was photolyzed in the SAPHIR atmosphere simulation chamber under ambient conditions. The isotopic composition of the product H2 was used to det...
Direct radiative effect of aerosols emitted by transport: from road, shipping and aviation
Direct radiative effect aerosols road shipping aviation
2010/8/13
Aerosols and their precursors are emitted abundantly by transport activities. Transportation constitutes one of the fastest growing activities and its growth is predicted to increase significantly in ...
Effect of hygroscopic seeding on warm rain clouds – numerical study using a hybrid cloud microphysical model
hygroscopic seeding warm rain clouds numerical study a hybrid cloud microphysical model
2010/8/12
The effect of hygroscopic seeding on warm rain clouds was examined using a hybrid cloud microphysical model combining a Lagrangian Cloud Condensation Nuclei (CCN) activation model, a semi-Lagrangian d...
Comprehensively accounting for the effect of giant CCN in cloud activation parameterizations
Comprehensively accounting effect giant CCN cloud activation parameterizations
2010/3/16
Large cloud condensation nuclei (CCN) (e.g., aged dust particles and seasalt) cannot attain their equilibrium size during the typical timescale of cloud droplet activation. Cloud activation parameteri...
Black carbon over Mexico: the effect of atmospheric transport on mixing state, mass absorption cross-section, and BC/CO ratios
Black carbon Mexico atmospheric transport BC/CO ratios
2010/1/18
A single particle soot photometer (SP2) was operated on the NCAR C-130 during the MIRAGE campaign (part of MILAGRO), sampling black carbon (BC) over Mexico. The highest BC concentrations were measured...
Ice nucleation properties of mineral dust particles: determination of onset RHi, IN active fraction, nucleation time-lag, and the effect of active sites on contact angles
mineral dust particles onset RHi IN active fraction nucleation time-lag
2010/1/18
A newly developed ice nucleation experimental set up was used to investigate the heterogeneous ice nucleation properties of three Saharan and one Spanish dust particle samples. It was observed that th...