As it rises, the air cools and condenses to form the cloud.
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As the air rises, the air cools and condenses to form a cloud.
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The precipitation we experience here on Earth happens as moisture-laden air cools and condenses.
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During the brief minutes of the total eclipse, the sky darkens and the air cools.
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In the rising columns, the air cools, condensing moisture within it and allowing clouds and showers to develop.
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Under the halo, the mist shoots out and warms the air, but then the air cools the water droplets.
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A group of her neighbors and relatives gather there most nights as the sun falls and the air cools.
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It holds that opening our jaws and sucking in air cools the brain, something other labs have found support for.
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As the air cools, it is a time to pause, reflect and atone, as we have for thousands of years.
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After the town of Manali, the air cools, and the road cuts through forests of spruce and cedar and fir.
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Tropical cyclones lift a huge volume of air into the upper levels of the atmosphere, where the air cools and dries.
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When warm, humid air cools, it loses its capacity to maintain its water content and precipitation occurs in the form of raindrops.
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And, under typical weather conditions when the air cools at night, these materials then re-radiate that heat, and the process starts anew.
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Cumulus clouds are usually formed when the sun heats the ground, sending warm air up, where the air cools and condenses to form a cloud.
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As the mass climbs higher, the smoky air cools and forms into a pyrocumulonimbus cloud, a soup of water and smoke particles towering miles into the sky.
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The clouds, seeded with these crystalline structures, will then produce rain and snow (rain is produced when moist air cools and collides with aerosols floating in the atmosphere).
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The air cools and sinks over the colder waters off South America, before returning towards Asia in a steady westward flow known to mariners as the trade winds.
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As the sun sets and the air cools, Wang Yulin, 61, tends to his fresh corn seedlings in a field on Shanhui's outskirts, as he has done for decades.
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The air cools and dries, eventually sinking off the coast of South America, before returning towards Asia in a steady westward flow near the surface known to mariners as the trade winds.
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Glossary of Meteorology. Gust Front. Retrieved on 2008-07-09. However the lifting occurs, the air cools due expansion in lower pressure, which in turn produces condensation.
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Academic Press, p. 66. . Retrieved on 2009-01-02. divergence aloft, or from storm-produced outflows at the surface. However the lifting occurs, the air cools due to expansion in lower pressure, which in turn produces condensation.
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Retrieved on 2009-01-02. convergence at the surface,Robert Penrose Pearce (2002). Meteorology at the Millennium. Academic Press, p. 66. . Retrieved on 2009-01-02. divergence aloft, or from storm-produced outflows at the surface. However the lifting occurs, the air cools due to expansion in lower pressure, and this produces condensation.
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Supersaturation occurs in the absence of condensation nuclei. Since the saturation vapor pressure is proportional to temperature, cold air has a lower saturation point than warm air. The difference between these values is the basis for the formation of clouds. When saturated air cools, it can no longer contain the same amount of water vapor.
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After an explosive decompression within an aircraft, a heavy fog may immediately fill the interior as the relative humidity of cabin air rapidly changes as the air cools and condenses. Military pilots with oxygen masks have to pressure- breathe, whereby the lungs fill with air when relaxed, and effort has to be exerted to expel the air again.
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Rider engine The Rider style engine is an "alpha" engine which uses two separate cylinders. As air in the hot side cylinder heats, it expands, driving the piston upward. The crankshaft now moves the cold side piston upward, drawing the hot air over to the cold side. The air cools, contracts, and pulls the hot side piston downward.
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Precipitation occurs when local air becomes saturated with water vapor, and can no longer maintain the level of water vapor in gaseous form. This occurs when less dense moist air cools, usually when an air mass rises through the atmosphere. However, an air mass can also cool without a change in altitude (e.g. through radiative cooling, or ground contact with cold terrain).
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Cirrostratus nebulosus (V-22) merging into darker altostratus translucidus (V-47) Abbreviation: Cs Clouds of the genus cirrostratus consist of mostly continuous, wide sheets of cloud that covers a large area of the sky. It is formed when convectively stable moist air cools to saturation at high altitude, forming ice crystals.Burroughs, William James; Crowder, Bob (January 2007). Weather, p.215.
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John Tyndall's tutorial books about physics contained many illustrations. This one, from Heat Considered as Mode of Motion, is his setup for demonstrating that air cools during the act of expanding in volume; and that air heats up during the act of compressing in volume. (Click on image for more explanation). Besides being a scientist, John Tyndall was a science teacher and evangelist for the cause of science.
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The National Weather Service reported on Saturday that the fire had produced a pyrocloud. This mass of hot air resembles a thunderstorm cloud that can collapse when the air cools down. The wind can manifest as strong gusts at the surface which can exacerbate the fire. On Sunday night, August 28th, the fire had charred 33,006 acres and was 54% contained, with very little, if not no growth overnight.
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As cooler air is more dense, the rise of such an airmass would tend to be resisted. When air rises, moist air cools at a lower rate than dry air. That is, for the same upwards vertical movement and starting temperature, a parcel of moist air will be warmer than a parcel of dry air. This is because of the condensation of water vapor in the air parcel due to expansion cooling.
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Compressed air dryers are special types of filter systems that are specifically designed to remove the water that is inherent in compressed air. The process of compressing air raises its temperature and concentrates atmospheric contaminants, primarily water vapor. Consequently, the compressed air is generally at an elevated temperature and 100% relative humidity. As the compressed air cools, water vapor condenses into the tank(s), pipes, hoses and tools that are downstream from the compressor.
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The sheet-like stratus clouds are almost uniformly horizontal, covering large areas but having relatively shallow depth of . These clouds begin to form when wind mixes moisture from the ocean surface into the air. The air cools and expands as it is mixed and moves upward, and this cooling increases the relative humidity. When the relative humidity reaches 100%, the water vapor condenses into liquid water droplets and the clouds begin to form.
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The observable characteristics of such high-pressure systems are usually clear, cloudless days with little or no wind. At sunset the upper air cools, as does the surface temperature, but at different rates. This produces a boundary or temperature gradient, which allows an inversion level to form - a similar effect occurs at sunrise. The inversion is capable of allowing very high frequency (VHF) and UHF signal propagation well beyond the normal radio horizon distance.
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This is the result of natural onshore movement of cool, humid air shortly after sunset when the ground air cools more quickly than the upper air layers. The same action may take place in the morning when the rising sun warms the upper layers. Even though tropospheric ducting has been occasionally observed down to 40 MHz, the signal levels are usually very weak. Higher frequencies above 90 MHz are generally more favourably propagated.
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This difference in pressure causes sea breezes to blow from the ocean to the land, bringing moist air inland. This moist air rises to a higher altitude over land and then it flows back toward the ocean (thus completing the cycle). However, when the air rises, and while it is still over the land, the air cools. This decreases the air's ability to hold water, and this causes precipitation over the land.
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Cooling water from the engine and compressor was fed into the boiler at about 70°C. For cold starting, the boiler was used to preheat the diesel engine. When the locomotive started from rest, the original steam cylinders were fed with steam alone, but when running they were powered by a mixture of steam and compressed air. The steam was needed to prevent the cylinders icing up, because compressed air cools when it expands.
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When a bubble is blown with warm air, the bubble will freeze to an almost perfect sphere at first, but when the warm air cools, and a reduction in volume occurs, there will be a partial collapse of the bubble. A bubble, created successfully at this low temperature, will always be rather small; it will freeze quickly and will shatter if increased further.Hope Thurston Carter: Frozen Frosted Fun hopecarter.photoshelter.com, Michigan, USA, 2014, retrieved 25 January 2017.
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The sun quickly warms the ground by a few degrees, which in turn warms the air close to the ground. This air cools to reach equilibrium with the mean air temperature very quickly when the sky becomes overcast. The layer of air within half a metre of the ground in the valleys also exhibit different temperatures at night to the air layer above it. During the clear nights of the dry season, the ground cools quickly cooling the air next to it.
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As water vapor condenses, latent heat is released into the air parcel. Moist air has more water vapor than dry air, so more latent heat is released into the parcel of moist air as it rises. Dry air does not have as much water vapor, therefore dry air cools at a higher rate with vertical movement than moist air. As a result of the latent heat that is released during water vapor condensation, moist air has a relatively lower adiabatic lapse rate than dry air.
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The Andes, the world's longest mountain range on the surface of a continent, seen from the air The position of mountains influences climate, such as rain or snow. When air masses move up and over mountains, the air cools producing orographic precipitation (rain or snow). As the air descends on the leeward side, it warms again (following the adiabatic lapse rate) and is drier, having been stripped of much of its moisture. Often, a rain shadow will affect the leeward side of a range.
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Heating of the earth near the equator leads to large amounts of convection along the monsoon trough or Intertropical convergence zone. This air mass rises to the lower stratosphere where it diverges, moving away from the equator in the upper troposphere in both northerly and southerly directions. As it moves towards the mid-latitudes on both sides of the equator, the air cools and sinks. The resulting air mass subsidence creates a subtropical ridge of high pressure near the 30th parallel in both hemispheres.
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The slower speed of the air at the earth's surface prevents the barometric pressure from falling as low as would be expected from the barometric pressure at mid altitudes. This is compatible with Bernoulli's principle. The secondary flow at the Earth's surface is toward the center of the cyclone but is then drawn upward by the significantly lower pressure at mid and high altitudes. As the secondary flow is drawn upward the air cools and its pressure falls, causing extremely heavy rainfall over several days.
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The compressors used in this type of dryer are usually of the hermetic type and the most common gas used is R-134a and R-410a for smaller air dryers up to 100 cfm. Older and larger dryers still use R-22 and R-404a refrigerants. The goal of having two heat exchangers is that the cold outgoing air cools down the hot incoming air and reduces the size of compressor required. At the same time the increase in the temperature of outgoing air prevents re-condensation.
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The dew point is the temperature to which air must be cooled to become saturated with water vapor. When cooled further, the airborne water vapor will condense to form liquid water (dew). When air cools to its dew point through contact with a surface that is colder than the air, water will condense on the surface. When the temperature is below the freezing point of water, the dew point is called the frost point, as frost is formed via deposition rather than condensation to form dew.
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Most of the cercariae encyst in the haemocoel of the ant and mature into metacercariae, but one moves to the sub-esophageal ganglion (a cluster of nerve cells underneath the esophagus). There, the fluke takes control of the ant's actions by manipulating these nerves. As evening approaches and the air cools, the infected ant is drawn away from other members of the colony and upward to the top of a blade of grass. Once there, it clamps its mandibles onto the top of the blade and stays there until dawn.
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Liquid nitrogen is produced commercially from the cryogenic distillation of liquified air or from the liquefication of pure nitrogen derived from air using pressure swing adsorption. An air compressor is used to compress filtered air to high pressure; the high-pressure gas is cooled back to ambient temperature, and allowed to expand to a low pressure. The expanding air cools greatly (the Joule–Thomson effect), and oxygen, nitrogen, and argon are separated by further stages of expansion and distillation. Small-scale production of liquid nitrogen is easily achieved using this principle.
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Dodger Stadium in 2002 For various reasons, Dodger Stadium has long enjoyed a reputation as a pitchers' park. At first, the relatively deep outfield dimensions were a factor, with the power alleys being about . Home plate was moved toward center field in 1969, but that move also expanded foul ground by , a tradeoff which helped to offset the increased likelihood of home runs caused by the decreased field dimensions. Also, during evening games, as the sun sets, the surrounding air cools quickly due to the ocean climate, becoming more dense.
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Monthly mean and minimum outdoor and indoor temperatures throughout Africa Globally, heating of the earth near the equator leads to large amounts of upward motion and convection along the monsoon trough or Intertropical Convergence Zone. The divergence over the near- equatorial trough leads to air rising and moving away from the equator aloft. As it moves towards the Mid-Latitudes, the air cools and sinks, which leads to subsidence near the 30th parallel of both hemispheres. This circulation is known as the Hadley cell and leads to the formation of the subtropical ridge.
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The Great Basin Desert is the only "cold" desert in the country, where most precipitation falls in the form of snow. The Great Basin Desert exists because of the "rainshadow effect" created by the Sierra Nevada of eastern California. When prevailing winds from the Pacific Ocean rise to go over the Sierra, the air cools and loses most of its moisture as rain. By the time the winds cross over the mountains and sweep down the far side, they are very dry and absorb moisture from the surrounding area.
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Compressed-air vehicles operate according to a thermodynamic process because air cools down when expanding and heats up when being compressed. Since it is not practical to use a theoretically ideal process, losses occur and improvements may involve reducing these, e.g., by using large heat exchangers in order to use heat from the ambient air and at the same time provide air cooling in the passenger compartment. At the other end, the heat produced during compression can be stored in water systems, physical or chemical systems and reused later.
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The mountain ridge is oriented at right angles to approaching weather systems, forcing the prevailing westerly airflows upward. As rising air cools, moisture in the air mass condenses, once reaching the saturation point, precipitation results. Laurel Hill may also act as a barrier to systems and slow the movement of storms having an impact on the local area, forming a "micro-climate". Although this mountain is not high enough to create its own weather, its structure is enough to gently nudge weather from hot to warm, cool to cold and from rain to snow.
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When night comes, the air cools and descends and at the same time a surface inversion (where air temperature increases with height) forms over the gulf. The densities in this stable layer are different above and below the inversion. The air descending from the peninsula to the east goes underneath the inversion layer and this generates a series of waves or rolling cylinders which travel across the gulf. These cylinders of air roll along the underside of the inversion layer, so that the air rises at the front of the wave and sinks at the rear.
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In the dry sector west of the dry line, clear skies are the rule due to the dryness of the air mass sweeping in from the Desert Southwest in North America, and the Aravalli range in India. If winds are strong enough, dust storms can develop. Cumulus clouds are common east of the dry line in the moist sector, though they are taller with greater development along the dry line itself. The moist sector is normally capped with a lid of an elevated mixed drier layer which represents subsidence from aloft as the surface air cools and contracts at night.
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The rainfall is stimulated by a variety of mechanisms, such as low-level air being lifted upwards by mountains, surface heating, convergence at the surface, divergence aloft, or from storm-produced outflows near the surface. When such lifting occurs, the air cools due to expansion in lower pressure, which in turn produces condensation and precipitation. In winter, the land cools off quickly, but the ocean maintains the heat longer. The hot air over the ocean rises, creating a low-pressure area and a breeze from land to ocean while a large area of drying high pressure is formed over the land, increased by wintertime cooling.
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Relative humidity (RH) is the measure of the humidity, or the water vapor content, in relation to the atmosphere and ranges from damp to dry. Material properties determine the affect that different levels of RH can have on any particular item. Organic materials like wood, paper, and leather, as well as some inorganic material like metals are susceptible to damage from incorrect RH. Damage ranges from physical changes like cracking and warping of organic materials to chemical reactions like corrosion of metals. Temperature has a direct effect on relative humidity: as warm air cools, relative humidity increases and as cool air warms up, relative humidity falls.
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In the summer, the inside air cools the warmer incoming supply air to reduce ventilation cooling costs.EERE Consumer's Guide: Energy Recovery Ventilation Systems This low-energy fan-and-motor ventilation system can be cost-effectively powered by photovoltaics, with enhanced natural convection exhaust up a solar chimney - the downward incoming air flow would be forced convection (advection). A desiccant like calcium chloride can be mixed with water to create a recirculating waterfall that dehumidifies a room using solar thermal energy to regenerate the liquid, and a PV-powered low-rate water pump to circulate liquid.Liquid Desiccant Waterfall for attractive building dehumidification Active solar cooling wherein solar thermal collectors provide input energy for a desiccant cooling system.
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It can be created artificially with aerosol canisters if the humidity and temperature conditions are right. It can also occur as part of natural weather, when humid air cools rapidly, for example when the air comes into contact with surfaces that are much cooler than the air. The formation of mist, as of other suspensions, is greatly aided by the presence of nucleation sites on which the suspended water phase can congeal. Thus even such unusual sources as small particulates from volcanic eruptions, releases of strongly polar gases, and even the magnetospheric ions associated with polar lights can in right conditions trigger the formation of mist and can make mirrors appear foggy.
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The air trapped within the combustion chamber of a Humphrey pump has two roles: both for combustion and also as an air spring to maintain the oscillating water column. As this spring action involves a large volume of air, relative to the minimal air needed for combustion, the air cools easily to below the ignition temperature to pre-ignite the next charge. There would still be a risk of inefficient four-stroking though, unless the scavenging is effective enough to sweep out the previous exhaust gases. This was done by using a tall, thin combustion chamber so that the combustion air remained roughly isolated from the majority of the chamber's air and so was scavenged through the exhaust valves first.
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The Chinook is a föhn wind, a rain shadow wind which results from the subsequent adiabatic warming of air which has dropped most of its moisture on windward slopes (orographic lift). As a consequence of the different adiabatic rates of moist and dry air, the air on the leeward slopes becomes warmer than equivalent elevations on the windward slopes. As moist winds from the Pacific (also called "Chinooks") are forced to rise over the mountains, the moisture in the air is condensed and falls out as precipitation, while the air cools at the moist adiabatic rate of 5 °C / 1000 m (3.5 °F / 1000 ft). The dried air then descends on the leeward side of the mountains, warming at the dry adiabatic rate of 10 °C / 1000 m (5.5 °F / 1000 ft).
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