Sentences with phrase «nucleation experiments»
The article is about the CERN cloud nucleation experiments, and consists of an interview with British particle physicist Jasper Kirby, who leads the project.
https://judithcurry.com/
Combined nucleation experiments on n - Nonane using a two valve expansion chamber and supersonic nozzle
Not exact matches
Laboratory experiments show that nucleation of sulfuric acid is considerably enhanced in the presence of aromatic acids.
By performing experiments in the precisely controlled environment of the CLOUD chamber, the project's scientists can change the concentrations of chemicals involved in nucleation and then measure the rate at which new particles are created with extreme precision.
The expansion chamber will be used to create a supercooled cloud by expansion and growth of drops at temperatures below 260 K.... In addition to experiments with supercooled liquid droplets already present (freezing nucleation), we will also investigate ice nucleation without pre-existing droplets (deposition nucleation).
These experiments concern the deposition nucleation of nitric acid and water vapours onto ion clusters to form nitric acid hydrates.
What's Next: The team expects that the surface - induced dissociation experiments will play an increasing role in understanding the initial steps of cluster nucleation and growth in solution.
Prior to the publication of the aerosol nucleation results from the CLOUD experiment at CERN in Nature several weeks ago Kirkby et al, 2011, I was asked by Nature Geoscience to write a «News and Views» on the CLOUD results for a general science audience.
In all experiments we seem to be below the level at which classical nucleation theory predict nucleation, but we are getting particles anyway.
Svenmark's GCRs have been mentioned, but despite Kirkby claiming that the CERN / CLOUD experiment had NO implications for the GCR hypothesis of causing climate effects, I think the sentence in the abstract ---» We find that ion - induced binary nucleation of H2SO4 — H2O can occur in the mid-troposphere but is negligible in the boundary layer.»
My point, Max, was that the CLOUD experiment will tell us something about the nucleation phenomenon, but will not be a realistic test of its quantitative significance in clouds as they exist in our atmosphere.
Under more controlled conditions, the GCR cloud nucleation mechanism has been confirmed experimentally (when certain natural aerosols are present) by the CLOUD experiment at CERN 5.
So far, the large - scale experiment has so far validated the basic GCR cloud nucleation mechanism in the presence of certain naturally occurring aerosols, but the scientists have cautioned that more work will need to be done to see if this effect is really confirmed in our atmosphere.
The CosmicsLeaving OUtdoor Droplets (CLOUD) experiment at CERN indicates that GCR - induced ionization enhanceswater — sulphuric acid nucleation in the middle and upper troposphere, but is very unlikely to give asignificant contribution to nucleation taking place in the continental boundary layer (Kirkby et al., 2011).
... numerous studies have attempted to quantify the ice nucleation ability of different particles empirically in laboratory experiments.
Heterogeneous ice nucleation on atmospheric aerosols: a review of results from laboratory experiments / C. Hoose & O. Mohler Institute for Meteorology and Climate Research — Atmospheric Aerosol Research, Karlsruhe Institute of Technology, Karlsruhe, Germany / Published: 29 October 2012 Abstract: A small subset of the atmospheric aerosol population has the ability to induce ice formation at conditions under which ice would not form without them (heteroge - neous ice nucleation).
Missing tropospheric hotspot Cern cloud chamber experiment indicates atomic particles increase nucleation so Svensmark Cosmic ray theory now has laboratory evidence.
These experiments concern the deposition nucleation of nitric acid and water vapours onto ion clusters to form nitric acid hydrates.
The expansion chamber will be used to create a supercooled cloud by expansion and growth of drops at temperatures below 260 K.... In addition to experiments with supercooled liquid droplets already present (freezing nucleation), we will also investigate ice nucleation without pre-existing droplets (deposition nucleation).