Cloud Condensation Nuclei (CCN)
Prediction of cloud condensation nuclei activity for organic compounds using functional group contribution methods
... as cloud condensation nuclei (CCN), and in turn modulate climate via indirect effects of aerosols on clouds and precip- itation (Andreae and Rosenfeld, ...
14
A broad supersaturation scanning (BS2) approach for rapid measurement of aerosol particle hygroscopicity and cloud condensation nuclei activity
... U.: Cloud condensation nuclei in polluted air and biomass burning smoke near the mega-city Guangzhou, China – Part 2: Size-resolved aerosol chemical composition, di- urnal cycles, and externally ...
10
A new method for calculating number concentrations of cloud condensation nuclei based on measurements of a three-wavelength humidified nephelometer system
... between cloud condensation nuclei (CCN) concentration and light extinction of dried particles: indications of underlying aerosol processes and implications for satellite- based CCN estimates, ...
12
External and internal cloud condensation nuclei (CCN) mixtures: controlled laboratory studies of varying mixing states
... Abstract. Changes in aerosol chemical mixtures modify cloud condensation nuclei (CCN) activity. Previous studies have developed CCN models and validated changes in exter- nal and internal mixing ...
13
Method to retrieve cloud condensation nuclei number concentrations using lidar measurements
... as cloud condensation nuclei ...modify cloud-forming processes and cloud microphysical properties (Rosenfeld et ...2018), cloud elec- trification (Wang et ...aerosol– ...
15
Versatile aerosol concentration enrichment system (VACES) operating as a cloud condensation nuclei (CCN) concentrator: development and laboratory characterization
... Abstract. The ability of atmospheric aerosol particles to act as cloud condensation nuclei (CCN) depends on many fac- tors, including particle size, chemical composition and mete- orological ...
12
Analysis of cloud condensation nuclei composition and growth kinetics using a pumped counterflow virtual impactor and aerosol mass spectrometer
... virtual impactor (PCVI) and a time-of-flight aerosol mass spectrometer (C-ToF-AMS) operated in series. The CCN chamber grows CCN-active particles into droplets larger than 1 µm, the PCVI inertially selects these large ...
12
Experimental and theoretical studies of cloud condensation nuclei
... The whole dataset therefore permits local closure of CCN concentration comparison of CCN spectra with that predicted from aerosol size distributions and chemical composition measurements[r] ...
174
Dust mass, cloud condensation nuclei, and ice-nucleating particle profiling with polarization lidar: updated POLIPHON conversion factors from global AERONET analysis
... Abstract. The POLIPHON (Polarization Lidar Photometer Networking) method permits the retrieval of particle num- ber, surface area, and volume concentration for dust and non- dust aerosol components. The obtained ...
17
Walser, Adrian (2017): On the Saharan air layer aerosol and its role as a reservoir of cloud condensation nuclei. Dissertation, LMU München: Fakultät für Physik
... higher cloud droplet concentrations and, as the CCN compete for the available water vapor, result in smaller droplet ...extend cloud lifetime (Albrecht, 1989; Rosenfeld et ...of cloud formation, thus ...
271
Assessment of cloud supersaturation by size-resolved aerosol particle and cloud condensation nuclei (CCN) measurements
... the cloud event, can best be derived by comparison of the CCN size distributions measured for total aerosol at different supersaturation levels with the size dis- tribution of aerosol particles actually activated ...
15
Evaluation of global simulations of aerosol particle and cloud condensation nuclei number, with implications for cloud droplet formation
... by condensation and coagulation from a few nanometers to a few hundred nanometers (Kerminen et ...create cloud droplets at atmospheri- cally relevant conditions are termed cloud condensation ...
27
Droplet activation of wet particles: development of the Wet CCN approach
... avoid condensation in the ...nologies Cloud Condensation Nuclei Counter (DMT CCNC) (Roberts and Nenes, 2005), held at a fixed supersaturation, to record activated droplet number ...
15
Characterization of aerosol photooxidation flow reactors: heterogeneous oxidation, secondary organic aerosol formation and cloud condensation nuclei activity measurements
... This work evaluated two flow tube reactor designs (TPOT and PAM) in terms of gas and particle transmission efficien- cies, residence time distributions (RTDs), and oxidized or- ganic aer[r] ...
17
ASAMgpu V1.0 – a moist fully compressible atmospheric model using graphics processing units (GPUs)
... from cloud condensation nucleis to cloud ...available cloud condensation nuclei is a prognostic variable and the supersaturation dependency is ...
9
Theory, field measurements, and laboratory experiments concerning the cloud condensation nucleus properties of organic and/or insoluble aerosol components
... and cloud formation, properties, and lifetime represent one of the largest uncertainties in aerosol radiative forcing and, thus, climate change [Houghton et ...thus, cloud condensation nuclei ...
342
Aerosols in the Pre-industrial Atmosphere
... of cloud condensation nuclei (CCN) concentrations, it is estimated that up to 12% of today’s Earth’s surface could be representative of the PI [38], with greater occurrences in single months (see ...
15
Scanning supersaturation condensation particle counter applied as a nano-CCN counter for size-resolved analysis of the hygroscopicity and chemical composition of nanoparticles
... U.: Cloud condensation nuclei in polluted air and biomass burning smoke near the mega-city Guangzhou, China – Part 2: Size-resolved aerosol chemical composition, di- urnal cycles, and externally ...
12
Significant Climate Impact of Highly Hygroscopic Atmospheric Aerosols in Delhi, India
... Aerosol particles in the atmosphere exert direct radiative forcing via scattering and absorbing solar radiation [Charlson et al., 1992], also exert indirect radiative forcing and impact hydrologic cycle via serving as ...
27
Potassium fluoride/K10-montmorillonite nanostructure as a Green and Reusable Catalyst under mild reaction conditions for the knovenagel Condensation
... With attention to above details, this research indicated that K10/KF nanostructure can be used as an suitable heterogeneous basic catalyst for solvent-free methods based on green chemistry to improve the Knoevenagel ...
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