I understand that the above fact doesn’t disprove your hypothesis, but nor have you proven anything after having made the bold statement (s). Some of you people apparently have spent ALL your time in Mom’s basement, never experiencing even the most basic and elementary of meteorological events! The clouds in ATL keep the land and city from heating up as much during the day… sunlight is reflected back or absorbed at higher altitude in Atlanta. It always astonishes me when people start arguing with me over things I didn’t say. Deserts are extremely dry places with almost no humidity, so the heat can’t be retained during the night. The desert, when night falls, becomes VERY cold especially the driest deserts: the Sahara, central Australia and where I lived once up on a time, Death Valley! Police officer dies from injuries in pro-Trump riot If convection were not a significant component of any surface cooling the warmed O2 and N2 would simply hang around maintaining a warm surface air temperature – while the surface (ground)temperature decreases – as happens when there is an inversion layer present. The rapid cooling is due to an almost transparent atmosphere allowing the hot surface radiation to escape unimpeded and the clear skies allow unrestricted convection. 1 Questions & Answers Place. So the diurnal temperature range can change in two ways. 1. But if they do not radiates significantly once warmed the only mechanism for loss of the gained energy is radiation to space – conversion from kinetic to potential energy is not energy loss – at least that is what thermodynamics teaches. This is not going to have a huge impact on the diurnal temperature range. 10 Answers. Dry air is a requirement for deserts and that is why they are cold at night. The sun is HOT, the moon at night is cold! Due to Humidity- When the air is already saturated with water, sweat evaporates more slowly. Congratulations on your float down the flat water section of the Green. In other words, when the sun is present, the deserts are hot, but once the sun starts setting, the region … The main reason it is colder is because of lack of cloud cover. Those are found roughly at latitudes 30 N and 30 S where the air from the inter-tropical convergence zone comes down. But a desert usually does see large temperature drops at night. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Why Is a Desert so Cold at Night? The dew point in Phoenix in July/August tends to be quite high. The reason you feel the variation is simple. 9NEWS meteorologist Kathy Sabine in her forecast tonight for the Denver metro area: … as the snow ends and the skies clear temperature’s going to drop like a rock without that blanket of clouds …. "Science is the belief in the ignorance of the experts" – Richard Feynman. Humidity makes it warmer at night. Mar 17, 2016 at 6:13 PM . It was on that trip that I learned that after camping in sand for several days, certain activities are extremely problematic. Desert area absorbs the heat from the sun and radiates it back to us (since heat rises). I don't know what desert you are from but I used to live in Arizona, and it never gets cold there in the summer at night… In fact, all the ones listed and probably more than that contribute to why it is colder, to some degree. No clouds to keep the heat in the lower atmosphere. Report: Trump refusing to pay Giuliani for legal work. 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