Sentences with phrase «nucleation occurring»

Their videos (use the link below) capture varying scales of water nucleation occurring in the nano - structures and the absorption of the majority of an impacting rain droplet with little or no splashing.

Once a critical point is reached, nucleation occurs and the amount of free calcium ions drops to a value that corresponds to the particular solubility concentration of the precipitated phase according to a typical LaMer diagram (25).

Precursor species that form still earlier than ACC or liquid precursors — that is, directly after ion contact and before nucleation occurs — have been postulated (12) and suggested through modeling approaches (13).

In the classical view (bold line), metastable clusters form and nucleation occurs when the critical nucleation enthalpy ΔG * is overcome.

Not exact matches

«If there is too little of either component then nucleation will not occur at an appreciable rate in the low atmosphere,» says Kirkby.

Although scientists have observed that the nucleation process nearly always involves sulfuric acid, sulfuric acid concentrations aren't high enough to explain the rate of new particle formation that occurs in the atmosphere.

«That something happened to lower the nucleation barrier, allowing crystallization to occur at a higher temperature.

Shuai Wei explained the advantage of this type of electrostatic levitation: «When the droplet is suspended in an electric field, it has no contact with its environment, so no crystal nucleation can occur and the process of crystallisation is slowed down.»

In large systems such a spontaneous transition is thought to occur due to a cosmic ray or some other local radiation that entered the sample to act as a nucleation point, or it is triggered by vibration.

Located in an area that has ruptured six times since 1857, the hole provided the first opportunity to observe directly the conditions under which earthquakes occur, to collect rocks and fluids from the fault zone for laboratory study, and to continuously monitor the physical condition within an active earthquake nucleation zone.

It just occurred to me that variations in ocean salinity over geological time might affect cloud nucleation, in addition to affecting ocean circulation, CO2 solubility, etc..

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.»

The development of clouds in such a fashion, which occurs only in a controlled laboratory environment, is referred to as homogeneous nucleation.

The basic cloud nucleation mechanism in the presence of certain naturally occurring aerosols has been confirmed by reproducible experimentation at CERN — so we have an empirically confirmed mechanism.

So far CERN has simply validated the cosmic ray cloud nucleation mechanism when certain naturally occurring aerosols are present.

And the press releases from CERN have also been quite factual, simply stating that the cloud nucleation mechanism by cosmic rays in the presence of certain naturally occurring aerosols has been validated, but cautioning that this does not mean that this effect in our actual climate system has yet been confirmed.

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.

Their freezing can either be triggered by aerosol particles acting as a so - called ice nuclei (IN), or occur homogeneously (without IN) at about − 38 ◦ C The goal of many laboratory studies was and is to assess the ice nucleation ability of selected aerosol particles of a... http://search.proquest.com/openview/421dd0783b387a8e030902328dcc6f23/1.pdf?pq-origsite=gscholar&cbl=105744

They also find that ion - induced binary nucleation of H2SO4 — H2O can occur in the mid-troposphere, but is negligible in the boundary layer and so additional species are necessary.

We find that ion - induced binary nucleation of H2SO4 — H2O can occur in the mid-troposphere but is negligible in the boundary layer.

So what is needed for nucleation to occur?

Climate engineering and chemical ice nucleation dispersions are creating engineered snow storms in many regions where it is not cold enough for natural ice nucleation to occur.