Sentences with phrase «calm air layers»

Although observatories are built at sites that typically have clear skies and relatively calm air layers, the only ways to get truly sharp images is go above the atmosphere (think Hubble Space Telescope) or to build highly complicated adaptive optics systems that correct for the atmospheric turbulence (and even most imperfections of the telescope itself).

Not exact matches

They actually say something different:» For example, most mid-latitude studies show that the heat island intensity (the difference between the temperature of the warmest location in the city and the background rural value) of the near surface air layer reaches its maximum a few hours after sunset on calm.

The reason is that on calm nights, the still air protects the temperature inversion (from the rapid cooling of the ground due to IR radiation to the sky), whereas on windy nights the inversion layer is disturbed.

At night time a layer of cool, calm air can develop close to the ground.