Detachment of Conidia by Cloud Droplets

Nature ◽  
1959 ◽  
Vol 183 (4676) ◽  
pp. 1695-1695 ◽  
Author(s):  
R. R. DAVIES
Keyword(s):  
Cloud Droplets

Evidence for heterogeneous formation of nitrous acid on cloud droplets

2000 ◽  
Vol 31 ◽  
pp. 352-353 ◽  
Author(s):  
K. Acker ◽  
W. Wieprecht ◽  
R. Auel ◽  
D. Kalass ◽  
D. Möller
Keyword(s):  
Nitrous Acid ◽  
Cloud Droplets ◽  
Heterogeneous Formation

scholarly journals A Cloud Microphysics Parameterization for Shallow Cumulus Clouds Based on Lagrangian Cloud Model Simulations

2018 ◽  
Vol 75 (11) ◽  
pp. 4031-4047 ◽  
Author(s):  
Yign Noh ◽  
Donggun Oh ◽  
Fabian Hoffmann ◽  
Siegfried Raasch
Keyword(s):  
Cloud Model ◽  
Cloud Microphysics ◽  
Heaviside Function ◽  
Mixing Ratio ◽  
Cumulus Clouds ◽  
Cloud Droplets ◽  
Shallow Cumulus ◽  
Initial Stage ◽  
Accretion Rates ◽  
The Moment

Abstract Cloud microphysics parameterizations for shallow cumulus clouds are analyzed based on Lagrangian cloud model (LCM) data, focusing on autoconversion and accretion. The autoconversion and accretion rates, A and C, respectively, are calculated directly by capturing the moment of the conversion of individual Lagrangian droplets from cloud droplets to raindrops, and it results in the reproduction of the formulas of A and C for the first time. Comparison with various parameterizations reveals the closest agreement with Tripoli and Cotton, such as and , where and are the mixing ratio and the number concentration of cloud droplets, is the mixing ratio of raindrops, is the threshold volume radius, and H is the Heaviside function. Furthermore, it is found that increases linearly with the dissipation rate and the standard deviation of radius and that decreases rapidly with while disappearing at > 3.5 μm. The LCM also reveals that and increase with time during the period of autoconversion, which helps to suppress the early precipitation by reducing A with smaller and larger in the initial stage. Finally, is found to be affected by the accumulated collisional growth, which determines the drop size distribution.

scholarly journals Mineral and biological ice-nucleating particles above the South East of the British Isles

2021 ◽  
Author(s):  
Alberto Sanchez-Marroquin ◽  
Jonathan S. West ◽  
Ian Burke ◽  
James B McQuaid ◽  
Benjamin John Murray
Keyword(s):  
Aerosol Particles ◽  
Ice Formation ◽  
British Isles ◽  
The South ◽  
Cloud Droplets ◽  
Homogeneous Freezing

A small fraction of aerosol particles known as Ice-Nucleating Particles (INPs) have the potential to trigger ice formation in cloud droplets at higher temperatures than homogeneous freezing. INPs can strongly...

Evaluation of ionic pollutants in cloud droplets at a mountain ridge in northern Japan using constrained oblique rotational factor analysis

2000 ◽  
Vol 54 (4) ◽  
pp. 279-283 ◽  
Author(s):  
Nobuaki Ogawa ◽  
Ryoei Kikuchi ◽  
Tomoko Okamura ◽  
Junko Inotsume ◽  
Tetsuya Adzuhata ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Mountain Ridge ◽  
Cloud Droplets ◽  
Rotational Factor ◽  
Northern Japan

Feasibility of an airborne TV camera as a size spectrometer for cloud droplets in daylight

1999 ◽  
Vol 38 (3) ◽  
pp. 441
Author(s):  
Howard K. Roscoe ◽  
Tom A. Lachlan-Cope ◽  
John Roscoe
Keyword(s):  
Cloud Droplets

scholarly journals Constraints on interactions between aerosols and clouds on a global scale from a combination of MODIS-CERES satellite data and climate simulations

2010 ◽  
Vol 10 (20) ◽  
pp. 9851-9861 ◽  
Author(s):  
X. Ma ◽  
K. von Salzen ◽  
J. Cole
Keyword(s):  
Liquid Water ◽  
Negative Relationship ◽  
Cloud Droplet ◽  
Global Scale ◽  
Effective Radius ◽  
Liquid Water Path ◽  
Cloud Droplets ◽  
Cloud Liquid Water ◽  
Albedo Effect ◽  
Cloud Liquid Water Path

Abstract. Satellite-based cloud top effective radius retrieved by the CERES Science Team were combined with simulated aerosol concentrations from CCCma CanAM4 to examine relationships between aerosol and cloud that underlie the first aerosol indirect (cloud albedo) effect. Evidence of a strong negative relationship between sulphate, and organic aerosols, with cloud top effective radius was found for low clouds, indicating both aerosol types are contributing to the first indirect effect on a global scale. Furthermore, effects of aerosol on the cloud droplet effective radius are more pronounced for larger cloud liquid water paths. While CanAM4 broadly reproduces the observed relationship between sulphate aerosols and cloud droplets, it does not reproduce the dependency of cloud top droplet size on organic aerosol concentrations nor the dependency on cloud liquid water path. Simulations with a modified version of the model yield a more realistic dependency of cloud droplets on organic carbon. The robustness of the methods used in the study are investigated by repeating the analysis using aerosol simulated by the GOCART model and cloud top effective radii derived from the MODIS Science Team.

scholarly journals Design and Calibration of a Counterflow Virtual Impactor for Sampling of Atmospheric Fog and Cloud Droplets

1988 ◽  
Vol 8 (3) ◽  
pp. 235-244 ◽  
Author(s):  
Kevin J. Noone ◽  
John A. Ogren ◽  
Jost Heintzenberg ◽  
Robert J. Charlson ◽  
David S. Covert
Keyword(s):  
Cloud Droplets ◽  
Virtual Impactor
Sign in / Sign up

Export Citation Format

Share Document