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Atmospheric Sciences

Atmospheric science is the study of the atmosphere, its processes, and the interaction of the atmosphere with other systems, including the effects other systems have on the atmosphere and visa versa. Fields in Atmospheric Sciences include Meteorology, Climatology, and Aeronomy. Ask and answer questions about Atmospheric Sciences in this category.

7,660 Questions

What is the main cause of temperature changes in the atmosphere?

air temperature changes as altitude increase. The temperature differences result mainly from the way solar energy is abosorbed as it moves through the atmosphere. some parts of the atmosphere are warmer because they contain a high percentage of gases that absorb solar energy. othe parts of the armosphere contain less of these gases and are cooler.

What are the four spheres of the earth?

The four spheres of the Earth are the lithosphere (land), hydrosphere (water), atmosphere (air), and biosphere (living organisms). These spheres interact and influence each other, shaping the conditions and environment on Earth.

What is a frost pocket?

This is a low lying place where late and early frosts are more likely than in the surrounding areas. A frost pocket is sometimes sparse in vegetation, especially in those species that can be damaged by late frosts in spring or early frosts in autumn.

What is the mechanism of cloud burst Why it occurs In what conditions cloud burst occurs?

Cloud burst occurs when a large amount of precipitation falls in a short period of time from a single cloud. This can happen when warm, moist air rises rapidly and condenses into clouds, leading to intense rainfall. Factors such as orographic lifting, convergence of air masses, and atmospheric instability can contribute to the conditions necessary for a cloud burst to occur.

What causes atmospheric pressure?

Amospheric pressure is caused by the weight of air molecules above it. As elevation increases, fewer air molecules are present. Therefore, atmospheric pressure always decreases with increasing height.

What is the barometer used for and how does it work?

A barometer is an instrument used to measure atmospheric pressure. It can measure the pressure exerted by the atmosphere by using water, air, or mercury. Pressure tendency can forecast short term changes in the weather. Numerous measurements of air pressure are used within surface weather analysis to help find surface troughs, high pressure systems, and frontal boundaries.

Why are amounts of gasses in the atmosphere usually shown in percentage of dry air?

Besides the gases that comprise air, air can also contain variable amounts of water vapor, characterized by the term, "relative humidity". Because the amount of water vapor held in air can change, it is simpler and more sensible to express component gas percentages on the basis of dry air. ProfHoff 830 (Always say of who you are citing)

Harmful gases in the atmosphere?

Some of the harmful gases which are rising in the atmosphere and are major cause of atmospheric pollution are (in no particular order):

  1. Carbon monoxide (from incomplete combustion of fuels... no choice, toxic to breathe),
  2. Sulfur dioxide and nitrogen oxide (from industrial and vehicular exhaust, causes of acid rain, irritates air passages),
  3. Chlorofluorocarbons (CFCs, refrigerant discharges, causes destruction of the ozone layer),
  4. Mercury emissions (from industries, fluorescent lamps and the burning of coal, potentially toxic),
  5. Carbon dioxide (fossil fuel burning and greenhouse gas),
  6. Methane gas (cow farming, landfill emissions and natural sources, greenhouse gas),
  7. Volatile organic compounds (from fuel vapors, solvent, paint, etc. Really includes methane too),
  8. Ozone (which is bad at low altitudes and does not survive to replenish the high altitude ozone layer which protects us from UV light)

See the Web Links for more information.

What is the blanket of air that surrounds the earth called?

The atmosphere. See the Web Link to the left for more information.
The Blanket of gases that surrounds the Earth is called...

y didnt any one put the answer? that's not good.... i need help with my homework!

The Atmosphere.

Summarize the carbon cycle starting and ending with carbon dioxide in the atmosphere.?

The carbon cycle is a process where carbon is removed and returned to the atmosphere. The ways of returning carbon to the atmosphere are-

1. Respiration

2. Decomposition

3. Combustion

Ways of removing carbon-

Photosynthesis.

The CO2 in the air is taken in by green plants for photosynthesis. The green plants die eventually and is decomposed; decomposition return carbon to the atmosphere. Animals respire and return carbon dioxide to the atmosphere. Decomposers respire as well. Green plants can be used to make fuels, which combust to return carbon dioxide to the air.

What is frost?

Frost is a coating or layer of ice that forms on surfaces due to the freezing of water vapor in the air when temperatures drop below freezing. It often appears as delicate, feathery patterns on objects like grass, leaves, or car windows.

What does carbon dioxide do in the atmosphere?

Individual carbon dioxide (CO2) molecules spend an average of 3-4 years in the atmosphere (the residence time), before moving on as part of the carbon cycle. However, because CO2 leaving the atmosphere is offset by CO2 from natural carbon sources, it takes a lot longer than this for artificial CO2 increases to dissipate - up to a thousand years. This is called the turnover time, or the global atmospheric lifetime. With burning fossil fuels (e.g. coal driven) and forest fires, along with cutting of forests, carbon dioxide increases.

Why are the outer planets so much more gaseous than the inner terrestrial ones?

Many of the original theories of the formation of our solar system postulated that a proto-planetary disk of dust and gas that surrounded our sun some 4.5 billion years ago, and this disk rotated around the sun, just as we orbit the same star now. The most popular theory put forth the idea that within this spinning disk, the heavier, metallic elements (silicates and so forth) would fall in towards the star, and the lighter elements, mainly Hydrogen and Helium, would be spun out towards the outer edge of this disk. Thus, the inners planets grew to become small, rocky bodies, while the planets farther out were able to feed off of, and grow exponentially from, this abundance of lighter elements farther out from the sun's orbit.

In recent years, it must be noted, this general concept of planetary formation has come into question, mainly due to the large volume of planetary systems discovered thus far that do not fit with this model of formation. Many Extrasolar or Exoplanets, those being planets found outside of our solar system, that have been discovered in the last 20 years have been found to be large, gas giant-type planets, very similar in makeup to our own Jupiter. The main difference, however, is that a significant portion of these planets have been found to orbit very close to their host star (usually at a fraction of the distance from which we orbit the sun), and can exhibit extremely small orbital periods, often on the order of less than a week. This type of Exoplanet is known as a Hot Jupiter.

The biggest problem with these findings as it pertains to our original theories is that having such large bodies orbiting in so close to a host star precludes the star from being able to support smaller, more terrestrial planets such as our own. An idea currently put forth, called the Planetary Migration Theory -PMT-, is thus far best able to explain this difference in what we believed we'd fine, and what we have actually observed. This theory puts forth the idea that these large gas giant planets did indeed form in a farther orbit from their star than we now observe them, and for reasons we are yet unable to fully explain, migrate in towards their star, eventually settling into a fairly stable orbit very close in.

If this theory proves to be true, than it does not necessarily invalidate our original theories on what causes the make-up of our own solar system. If we find that we have a hard time proving the PMT, this forces us to continue to re-think our ideas on planetary formation and orbital position. If we learn anything from each new discovery of new planets and stars, it is that our solar system is hardly a standard model or template for galactic planetary system formation, but rather, one more snowflake in the storm...Unique and awe-inspiring.

How much does a column of air weigh?

Water's mass depends on its purity. The old definition of a gram was the mass of one ml of pure water at 0 degrees C.

The mass of a column of water is therefore approximately one gram per ml, where the number of ml is the column's length in cm, times 2pi times its radius in cm squared.

Now, weight is proportional to mass and the inverse square of the distance between two bodies. One body is the column of water and we'll assume the other to be the earth. Assume this column of water is "close" to the earth and a good estimate for the weight is 9.81 times the water's mass.

On the earth's surface, at 0 deg C, a column of pure water's mass, in grams, is approximately 9.81*L*2pi*r2 with L and r in cm.

Where is atmospheric pressure maximum and why?

A saxophone is playing a steady note of frequency 210 Hz. The temperature in the room is 25 C. Suppose that, at some instant, the varying pressure at your eardrum is at a maximum. How far away (in meters) is the next pressure maximum?

If anyone can help me with this, I would appreciate?

The speed of sound at 25 C = 343m/s

wavelength = speed of sound / frequency

wavelength = 343m/s / 210/s = 1.6m

Therefore, the distance of the next pressure maximum is 1.6m away from your ear drum.

What is the hottest layer of the Earth's atmosphere?

The thermosphere is the hottest layer of Earth's atmosphere. The molecules there are directly exposed to solar radiation and high-energy cosmic rays. However, there are so few molecules by volume that the specific heat is virtually zero.

The thermosphere is generally located 85 to 500 km above the Earth, and the International Space Station orbits in the outer thermosphere (330 to 450 km altitude).

Why are sunsets red?

Sunlight entering the atmosphere is "white" light, containing all the colors in the spectrum. Dust in the air tends to scatter the blue components of the sunlight making the sky appear blue.

However, when we look towards the sun at sunset, we see red and orange colors because the blue light has been scattered out and away from the line of sight. The more dust there is in the air the more marked is this effect.

Why troposphere is densest part of the atmosphere?

gravity helps pull down the layers of the atmosphere and the upper atmosphere is further away so its going to have less of a pull on it there for being less dense then the closest atmosphere.

hoped that helped.

Is the atmosphere important?

The atmosphere that surrounds our planet Earth contains the right proportions of gases that are absolutely essential for life, one of those gases is oxygen, making up 21 percent of the air we breathe, without it humans and animals die within minutes. But too some of those gases, by themselves are deadly but because air contains safe proportions of these gases, we can breathe them without harm.

What climate region has the most climate zones?

the mid-latitude region and it is because there is a mix of air masses. in most mid-latitude climates, the temperature changes with the seasons. sometimes the climate zones in this region are called temperate climates.

Has Earth's atmosphere always had the same composition?

No, Earth's atmosphere has not always had the same composition. It has evolved over billions of years due to various factors such as volcanic activity, the presence of living organisms, and human activities. The composition of Earth's atmosphere today is a result of these complex interactions over time.

Is the pressure in the atmosphere constant?

No. In fact, variation in atmospheric pressure is one of the most useful forecasting tools there is. A low pressure center might have a pressure of, say 990 mb. This indicates inflow and upward flow, which goes along with a storm. A hurricane could be as low as 900 mb at the center, which indicates REALLY strong inflow and upward motion. A high pressure center, which might typically have a pressure of 1020 mb indicates descending air, which becomes hot and dry as it falls. Take a look at a surface pressure map at http://weather.unisys.com/. Vertically, the pressure differences are even more dramatic. At approximately 5.5 km above the surface, the pressure is about 1/2 of what it is at the surface. Typically, meteorologists talk about the height of a surface with constant pressure, but the idea is the same.

Which layer of atmosphere is ideal for flying aeroplanes?

The stratosphere is the ideal layer of the atmosphere for flying airplanes due to its stability and smooth air currents, which minimize turbulence and provide more efficient fuel consumption. In the stratosphere, the jet stream can also help increase the speed of the aircraft.

Does rusting increase the mass of an object?

yeah it actually depends upon the "material" you have taken, if it is so large then it will make no difference. but if you want exact measurement, then its mass will remains constant. rust will fulfill the deficiency in mass of that material. If we remove the dust then its mass will obviously decreases.

Why is the air troposphere unstable most of the time?

Because it is being heated from below, and warm air likes to rise. Solar radiation generally does not heat the atmosphere, but heats the earth's surface, which then radiates thermal energy (heat) back into the atmosphere. Since this warm air rises, there tends to be constant vertical motion in the lower atmosphere, which is the essence of instability.