Results 121 to 130 of about 1,225 (164)

An Automatic Cloud Condensation Nuclei Counter

Journal of Applied Meteorology, 1969
Abstract A cloud condensation nuclei counter has been developed in which the concentration of water droplets which form on cloud condensation nuclei in a large thermal diffusion chamber is determined electronically by measuring the light scattering coefficient of the cloud.
L. F. Radke, P. V. Hobbs
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From cloud condensation nuclei to cloud droplets: a turbulent model

2009
The formation of a warm vertical cloud is classically described by the evolution of microscopic droplets [1]. Droplets start to nucleate around solid particles in a favourable environment (i.e. for positive supersaturation in the absence of solute effect). Then, if the available vapour is sufficient, they grow by condensation.
A. CELANI, MAZZINO, ANDREA, TIZZI, MARCO
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Cloud Condensation Nuclei Measurements Within Clouds

Journal of Climate and Applied Meteorology, 1984
Abstract Measurements of the spectra of cloud condensation nuclei (CCN) within and near the boundaries of clouds are presented. Some of the in-cloud measurements excluded the nuclei within cloud droplets; these are interstitial CCN while other measurements included all nuclei inside the cloud (total CCN).
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Diurnal variations in cloud condensation nuclei

Journal of Geophysical Research, 1974
An increase in the concentration of cloud condensation nuclei at night has been reported frequently in recent years in Australia. An experiment was conducted in this country to determine if and why an evening increase in cloud condensation nuclei might occur.
Ta-Fea David Lee, James E. Jiusto
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Cloud Condensation Nuclei and Ship Tracks

Journal of the Atmospheric Sciences, 2000
Abstract Enhancements of droplet concentrations in clouds affected by four ships were fairly accurately predicted from ship emission factors and plume and background cloud condensation nucleus (CCN) spectra. Ship exhausts thus accounted for the increased droplet concentrations in these “ship tracks.” Derived supersaturations were typical of marine ...
James G. Hudson, Timothy J. Garrett, Peter V. Hobbs, Scott R. Strader, Yonghong Xie, Seong Soo Yum   +5 more
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The Formation of Sulfates and the Enhancement of Cloud Condensation Nuclei in Clouds

Journal of the Atmospheric Sciences, 1974
Abstract The production of ammonium sulfate by oxidation of dissolved sulfur dioxide in cloud droplets in a wave cloud situation, and the resulting enhancement of cloud condensation nuclei (CCN) released from the cloud on evaporation, have been calculated. The condensational growth of droplets formed on 75 initial CCN sizes is considered simultaneously
Richard C. Easter, Peter V. Hobbs
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The role of clouds in the enhancement of cloud condensation nuclei concentrations

Atmospheric Research, 1994
Abstract Three exist three possible mechanisms for the enhancement of cloud condensation nuclei (CCN) in the vicinity of and within clouds. Firstly, when clouds form due to mixing air masses, real-time CCN measurements show that CCN concentrations could register an increase around such clouds due to differences in the aerosol content of the two air ...
V.K. Saxena, J.D. Grovenstein
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Impacts of cloud condensation nuclei on deep stratus clouds

AIP Conference Proceedings, 2013
Simulations of a warm front associated with a deep, mixed-phase stratus cloud were performed with three different background cloud-nucleating aerosol profiles representative of clean, moderate, and polluted environments using the Regional Atmospheric Modeling System.
Adele L. Igel, Susan C. van den Heever, Catherine M. Naud, Stephen M. Saleeby, Derek J. Posselt   +4 more
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Cloud condensation nuclei spectral climatology

AIP Conference Proceedings, 2000
Airborne measurements of cloud condensation nuclei spectra at several locations around the world are presented. Vertical distributions show gradients that appear to represent cloud scavenging and continental (anthropogenic) particle production.
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A new instrument for measuring cloud condensation nuclei: Cloud condensation nucleus “remover”

Journal of Geophysical Research: Atmospheres, 1998
This communiqué describes a new and novel instrument for measuring concentrations of natural cloud condensation nuclei (CCN) from the free atmosphere. It simultaneously provides the size spectrum of nucleated particles, a useful parameter for gaining insight into the composition of the CCN.
Qiang Ji, Glenn E. Shaw, Will Cantrell
openaire   +1 more source