Sentences with phrase «as warm air rises»

At those levels of the atmosphere, expansion happens all the time as warm air rises.

magicjava (09:23:59): At those levels of the atmosphere, expansion happens all the time as warm air rises.

As warm air rises this leads to the formation of depressions at sea level, or low air pressure weather systems.

Stephen Wilde says: July 18, 2013 at 9:17 pm «The latter results from kinetic energy being converted to potential energy as warm air rises against the force of gravity in a convective column.»

The latter results from kinetic energy being converted to potential energy as warm air rises against the force of gravity in a convective column.

Not exact matches

The warmed air then rises up through a rack of peppers (or other flora), taking the moisture with it as the hot air exits through the top.

Frustrated by failure to agree a broad international deal to limit global warming, about 30 nations have joined the U.S. initiative to limit short - lived air pollutants as a new way to curb temperature rises, protect health and aid crop growth.

And it finds that, while this winter's unusually strong Arctic Oscillation - which funnels cold northern air to the East Coast and pulls warm mid-latitude air up to the Arctic - is predicted as atmospheric carbon dioxide levels rise, seasonal temperature anomalies associated with it aren't enough to blunt long - term warming trends.

Warm air is lighter than cool air, so any object filled with it will rise, as long as the lifting power of the air counteracts the weight of the container.

The large, bald - headed birds float on rising currents of warm air known as thermals, which they use to soar high into the sky without beating their wings, thereby saving energy.

Understanding how layers of air insulate the surface of glaciers, for example, is vital to making accurate estimates of how fast they will melt — and sea levels will rise — as the Earth warms under its blanket of greenhouse gases.

And white roofs can reduce precipitation as well, by reducing the amount of warm, humid air rising and, thus, the number of clouds and eventual rainfall.

As the equatorial air warms up, it expands and rises.

Some air conditioners still use chemicals that deplete the ozone layer and demand for air - conditioners is expected to rise as a result of global warming, so green buildings could help counter this demand.

However, for the globe as a whole, surface air temperatures over land have risen at about double the ocean rate after 1979 (more than 0.27 °C per decade vs. 0.13 °C per decade), with the greatest warming during winter (December to February) and spring (March to May) in the Northern Hemisphere.

The former is likely to overestimate the true global surface air temperature trend (since the oceans do not warm as fast as the land), while the latter may underestimate the true trend, since the air temperature over the ocean is predicted to rise at a slightly higher rate than the ocean temperature.

The Fourth Assessment Report finds that «Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising mean sea level.

According to the study, as the planet warms, the Hadley Cell, which links together rising air near the Equator and descending air in the subtropics, expands poleward.

First as the temperature gradient in the atmosphere increases, at a certain point the atmosphere becomes unstable (because rising (falling) packets of air do not cool (warm) fast enough by expansion (compression) to stop rising (falling)-RRB-.

Do you REALLY want to insist that those turned - off air conditioners could possibly function as a source of heat (or temperature rise) under such conditions and actually warm up that cold room?

due to co2 we are already living in a greenhouse.Whatever one does in that greenhouse will remain in the greenhouse.INDUSTRIOUS HEAT will remain in the greenhouse instead of escaping into outer space; this is a far greater contributor to global warming than other factors and far more difficult to reduce without reducing economic activity.Like warm moist air from your mouth on cold mornings so melting antarctic ice will turn into cloud as it meets warm moist air from tropics the seas will not rise as antarctica is a huge cloud generator.A thick band of cloud around the earth will produce even temps accross the whole earth causing the wind to moderate even stop.WE should be preparing for this possible scenario»

Justin Gillis spent several months building the article that ran in The Times over the weekend chronicling efforts to clarify how much seas could rise in this century as the world's ice sheets erode in the face of warming seas and air.

Indeed, there is a clear physical reason why this is the case — the increase in water vapour as surface air temperature rises causes a change in the moist - adiabatic lapse rate (the decrease of temperature with height) such that the surface to mid-tropospheric gradient decreases with increasing temperature (i.e. it warms faster aloft).

Excerpt: Livermore CA (SPX) Nov 01, 2005 If humans continue to use fossil fuels in a business as usual manner for the next several centuries, the polar ice caps will be depleted, ocean sea levels will rise by seven meters and median air temperatures will soar 14.5 degrees warmer than current day.

Air expands and cools as it rises (to lower pressure) and does the opposite when it sinks (to higher pressure), which is why convection can not make the troposphere as warm as the surface.

The former is likely to overestimate the true global surface air temperature trend (since the oceans do not warm as fast as the land), while the latter may underestimate the true trend, since the air temperature over the ocean is predicted to rise at a slightly higher rate than the ocean temperature.

Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global average sea level.

Similar negative effects occur with worsening air pollution — higher levels of ground - level ozone smog and other pollutants that increase with warmer temperatures have been directly linked with increased rates of respiratory and cardiovascular disease — food production and safety — warmer temperatures and varying rainfall patterns mess up staple crop yields and aid the migration and breeding of pests that can devastate crops — flooding — as rising sea levels make coastal areas and densely - populated river deltas more susceptible to storm surges and flooding that result from severe weather — and wildfires, which can be ancillary to increased heat waves and are also responsible for poor air quality (not to mention burning people's homes and crops).

Seems to me the debate about AGHG global warming and increasing TC frequency / intensity / duration boils down to the fact that as sea surface temperatures, as well as deeper water temperatures rise, the wallop of any TC over warmer seas without mitigating circumstances like wind sheer and dry air off land masses entrained in the cyclone will likely be much more devastating.

2) The warmed water vapour rises up in the air... and as it rises it cools... and frequently forms clouds at altitude.

Hansen got the warming right in the 1980s, the hockey stick is validated by numerous oth alternative research methods and ocean heat content and arctic ice continue to rise and shrink as predicted from the understanding of the physical effect of CO2, as have air temperatures in the area.

As the Earth warms and sea level rises, it is inundated with seawater, which is 12 - 15 degrees warmer than the average air temperature.

A thunderstorm event might be best depicted as a run - away rising column of air that is becoming progressively warmer than the surrounding air as condensing water vapor yields its heat of vaporization until almost all water vapor has condensed out and then cooling at a rate of 9.8 deg C per 1000 meters, it eventually reaches a warmer layer of air and spreads out like smoke over a ceiling.

As you say, convection uses up a lot of energy too and also counters the idea of radiative heat transfer as a big ticket item because «hot» CO2 molecules only remain so for a brief fraction of a second before they collide with N2 or O2 to warm that localised parcel of air; which then rises to attain equilibrium T somewhere higher and at a COLDER temp so no rad Transf!As you say, convection uses up a lot of energy too and also counters the idea of radiative heat transfer as a big ticket item because «hot» CO2 molecules only remain so for a brief fraction of a second before they collide with N2 or O2 to warm that localised parcel of air; which then rises to attain equilibrium T somewhere higher and at a COLDER temp so no rad Transf!as a big ticket item because «hot» CO2 molecules only remain so for a brief fraction of a second before they collide with N2 or O2 to warm that localised parcel of air; which then rises to attain equilibrium T somewhere higher and at a COLDER temp so no rad Transf!!!

The Fourth Assessment Report finds that «Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising mean sea level.

As the air rises, it expands and cools, and water vapour condenses, releasing even more heat,» much like how a hurricane frees energy by drawing warm humid air from its base (usually tropical sea water) and then releasing cold, wet air 7 miles (12 kilometers) up in the troposphere.

One study estimates that there are likely to be places on Earth where unprotected humans without cooling mechanisms, such as air conditioning, would die in less than six hours if global average surface temperature rises by about 12.6 ° F (7 ° C).16 With warming of 19.8 - 21.6 ° F (11 - 12 ° C), this same study projects that regions where approximately half of the world's people now live could become intolerable.7

As the aerosol particles rise on the warm, convecting air, they produce more rain over northern India and the Himalayan foothill, which further warms the atmosphere and fuels a «heat pump» that draws yet more warm air to the region.

He considered the warming of the earth's atmosphere as a result of a rise of the carbon dioxide content of the air of approximately 0.03 to 0.04 percent as impossible.

Energy is continually entering the atmosphere (probably more than 50 % at the surface) and then of course it takes a finite time for warm air to rise by convection, cooling as it does so.

The point is that the formula for the DALR comes from the assumption that the air heats down low and rises, expanding adiabatically into the air above it (doing work against its increased pressure / density) and cooling as a consequence, a process that only «stops» when there is a uniform lapse between the warm bottom and the actively cooled top.

Besides the total energy at any time, there is the question of the rate of transfer of energy as the warm moist air rises and the water freezes in clouds and returns to the surface.

The warmed surface radiates as a blackbody, and also loses heat through rising in air currents or evaporated moisture.

As the CO2 and CH4 (methane) level goes up, H2O vapour in the atmosphere falls which — because H2O is 30 times more important than CO2 as a «greenhouse gas» offsets the effect of CO2 on temperature, while cloud cover and albedo increases because warmed moist air rises to form clouds, further cooling the worlAs the CO2 and CH4 (methane) level goes up, H2O vapour in the atmosphere falls which — because H2O is 30 times more important than CO2 as a «greenhouse gas» offsets the effect of CO2 on temperature, while cloud cover and albedo increases because warmed moist air rises to form clouds, further cooling the worlas a «greenhouse gas» offsets the effect of CO2 on temperature, while cloud cover and albedo increases because warmed moist air rises to form clouds, further cooling the world.

Hurricanes (Fig. 7) and other tropical cyclones can be thought of as heat engines that take energy in by evaporating warm ocean water, and eject it at a colder temperature near the tropopause after air rises and water condenses in the eyewall [14].

In addition, as the lower atmosphere is warmer than the land surface, this creates stable conditions that prevents the polluted air from rising.

Latent heat plays a part in the troposphere — the bottom 6 to 10 km of the atmosphere — as warm, moist air rises it cools, water vapour condenses and heat is released.

Since a sustainable future based on the continued extraction of coal, oil and gas in the «business - as - usual mode» will not be possible because of both resource depletion and environmental damages (as caused, e.g., by dangerous sea level rise) we urge our societies to -LSB-...] Reduce the concentrations of warming air pollutants (dark soot, methane, lower atmosphere ozone, and hydrofluorocarbons) by as much as 50 % [and] cut the climate forcers that have short atmospheric lifetimes.

The moist warm air rises, and as it rises, it cools.

Air containing water in vapour form will rise higher than dry air because it is lighter so when the vapour is removed it must fall back to its «correct» height but because of the air around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surfaAir containing water in vapour form will rise higher than dry air because it is lighter so when the vapour is removed it must fall back to its «correct» height but because of the air around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surfaair because it is lighter so when the vapour is removed it must fall back to its «correct» height but because of the air around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surfaair around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surface.