Sentences with phrase «clouds form»

Study helps narrow down one reason why clouds are hard to model From the DOE / PACIFIC NORTHWEST NATIONAL LABORATORY RICHLAND, Wash. — Airborne particles known as «aerosols» strongly impact the way clouds form and change, but accurately capturing this effect in computer climate models has proved to be notoriously difficult.

It does not allow for negative feedback, for example, as more clouds form changing the albedo.

So how do clouds form?

The research indicates that fewer clouds form as the planet warms, meaning less sunlight is reflected back into space, driving temperatures up further still.

The key was to ensure that the way clouds form in the real world was accurately represented in computer climate models, which are the only tool researchers have to predict future temperatures.

We see this at the beginning of each interglacial period where temperature shoots up like a rocket as the ocean warms and clouds form then it screeches to a halt like it hit an iron ceiling at a couple degrees warmer than earth's current temperature.

When there is a reduction in tropical temperature for any reason, not just volcanoes, cumulus clouds form later, say at noon instead of their usual 11:00.

Is it just a coincidence that the water vapor condenses to form clouds and as the clouds form they reflect sunlight?

Essentially, when the ionization is weaker, less clouds form.

When surface temperature and humidity reach a threshold, clouds form which reduce incoming energy from the sun reaching the surface, particularly in Earth's vast oceanic tropics (where a disproportionate portion of it enters the climate system), while daily afternoon thunderstorms remove enough heat from surface areas to bring surface temperatures back into line.

Stratus clouds form flat layers that obscure the sun and therefore appear grayish.

That same black soot floats higher into the air, where it helps to change the way clouds form - and so to warm the climate.

And when clouds form, my digital camera can not see the image without RFI film shielding it.

Some scientists believe cosmic rays (high - speed particles from outer space) are one of the reasons clouds form in the Earth's lower atmosphere.

In this image, the clouds form several hundred kilometers off the coast, but at times when the air is less dry or westerly winds are less strong, clouds can be seen hugging the coast.

Dubbed «mother - of - pearl» clouds because of their attractive appearance, polar stratospheric clouds form at temperatures below -78 ° C.

This summer in Michigan, it's been very common to see clouds form at night (when the air cools a little), then dissipate soon after the sun comes up.

Thus, we come to a dead end: calculations of nucleation become impossible below Tlim with Boltzmann statistics although many cirrus clouds may form at these T (especially in the tropics), polar stratospheric clouds, playing important role in ozone depletion, noctilucent and mesospheric clouds form at even lower T. Vitaly Khvorostyanov

After about 11:00, clouds form and cool the earth when it is warm.

The typical southern afternoon clouds form and build in patches even though the humidity is pretty uniform.

Somewhat late, but if condensation drives winds by a decreasing the number density of water vapor in the air, then as clouds form they should shrink in size due to the negative pressure.

But there are few that show you where clouds actually form and, crucially, at what altitude those clouds form.

Cirrus clouds form at 15,000 to 20,000 feet, i.e., in the middle of the troposphere.

When these gases mix with clouds they form dilute sulphuric acid and dilute nitric acid.

It makes sense to me that clouds form over cold seas and dissipate over warm.

As more water vapour condenses at altitude — more clouds form reflecting sunlight back into space and cooling the planet.

If it gets too hot, the oceans heat up, evaporation increases, high altitude clouds form, and they reflect back sunlight and shade the surface more, compensating and regulating temperatures so that life survives.

Is it plausibe we could observe these and calculate cloud processes (determing where clouds form and dissipate, geographically and vertically) by changes in these wavelength at ToA?

For example, how and why clouds form, behave and disperse is poorly understood.

>> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> > It makes sense because the clouds form along the frontal lines (high / low pressure) and though the Jets are not exactly the same they are connected to those fronts.

These clouds form up to heights of 30 km (19 miles).

Changes in ocean surface temperatures caused by El Niño significantly affect where cumulonimbus clouds form in the ITCZ and, therefore, the geographic structure of the Hadley cell.

A recent Science paper (open link here), doesn't quite answer that question, but does provide a strong indicator by measuring the residues from the ice nuclei from which cirrus clouds form.

If we are to understand the mechanisms behind global climatic temperature variability then it is absolutely essential to look at clouds as being the primary direct controller of variability and therefore we must understand how and why clouds form and what controls them.

For example this one which shows that as clouds form they expand as would be expected based on simple thermodynamical arguments (condensation provides heat energy to the surrounding atmosphere, which expands carrying the aerosols in the cloud outward)

Similar principle to how clouds form: if a molecule of water vapor hits a water droplet it has an excellent chance of sticking to it instead of bouncing off it.

Generally, cloud nuclei are not in short supply over the ocean, as the oceanic clouds form mostly around crystals of sea salt.

The stable air that causes the ultra-cold conditions where polar stratospheric clouds form in Antarctica is much less likely.

When clouds form, the diabatic heating from condensed water vapor warms the air.

Where and when do clouds form in the atmosphere?

The wild exaggerations of both the direct CO2 warming and the supposedly more serious knock - on warming are rooted in an untruth: the falsehood that scientists know enough about how clouds form, how thunderstorms work, how air and ocean currents flow, how ice sheets behave, how soot in the air behaves.

The clouds form from moisture being trapped beneath a temperature inversion.

Several models see a positive feedback of clouds when the temperatures increase, but this seems to be wrong, at least in the tropics and the Arctic, where clouds form a strong negative feedback.

RE # 24, Ferdinand you state, «Several models see a positive feedback of clouds when the temperatures increase, but this seems to be wrong, at least in the tropics and the Arctic, where clouds form a strong negative feedback.»

A process like cloud formation is either an intractable solution or too computationally expensive, so either smaller models modelling what conditions clouds form in and how their form changes are done and the results put into a parameter list.

Regionally, changes in relative humidity near the surface would affect the height at which clouds form...

On convection clouds form and the latent (moist) energy is converted to sensible heat upon condensation.

According to my old text book «A Short Course in Cloud Physics» by Rogers and Yau (1989, p. 95 in Third edition): «Condensation nuclei of some sort are always present in the atmosphere in ample numbers: clouds form whenever there are vertical air motions and sufficient moisture».

However, many processes that remove water from the atmosphere (i.e. cloud formation and rainfall) have a clear functional dependence on the relative humidity rather than the total amount of water (i.e. clouds form when air parcels are saturated at their local temperature, not when humidity reaches X g / m3).

There has been some (misguided) history of using the observed histogram of tropical SSTs (apped at 30 Cish) and the fact that clouds form in such regimes as an indication of stabilizing feedbacks in the tropics.