Last Updated on October 1, 2022 by amin
Why does the temperature change in the thermosphere?
Much of the X-ray and UV radiation from the Sun is absorbed in the thermosphere. When the Sun is very active and emitting more high energy radiation the thermosphere gets hotter and expands or “puffs up”. Because of this the height of the top of the thermosphere (the thermopause) varies.
How do changes in the average temperature of the troposphere affect the altitude of the tropopause?
The tropopause occurs at approximately 20 000 feet over the poles and at approximately 60 000 feet above the equator. … Due to the tropospheric effect of temperature decrease with height in general the temperature at the Tropopause is lower equatorward and higher poleward.
How does the composition of the troposphere change with a change in altitude?
The concentration of water vapor decreases with an increase in altitude. The average concentration of water vapor for the troposphere is 0.46% while the average concentration for the stratosphere is 0.0005%. … If a gas has a low concentration it is easier to express its concentration in ppm rather than percent.
Why troposphere is the hottest part of the atmosphere?
C) It is heated by the Earth 3 surface. D) There are charged particles in it. Correct Answer: C) It is heated by the Earth 3 surface.
Troposphere is the hottest part of the atmosphere because.
|List I (Sphere of the Earth)||List II (Main Constituent of the Sphere)|
|Hydrosphere||2. Mixture of gases|
Does the temperature in the troposphere increase or decrease?
As the density of the gases in this layer decrease with height the air becomes thinner. Therefore the temperature in the troposphere also decreases with height in response. As one climbs higher the temperature drops from an average around 62°F (17°C) to -60°F (-51°C) at the tropopause.
How does the troposphere affect weather?
The Troposphere is the area of interest because it is the area where most weather occurs. The most rapid changes in temperature also take place. This changing temperature allows both horizontal and vertical motion and the resultant mixing. Consequently this is a generally mixed sometimes turbulent layer.
How does air pressure affect weather in the troposphere?
It is associated with light winds at the surface and subsidence through the lower portion of the troposphere. When pressure increases more air fills the space left from the low and subsidence evaporates most of the atmosphere’s water vapour. … Hence we can say that the Atmospheric pressure is an indicator of weather.
Why Does Temperature Decrease In The Troposphere?
In the troposphere the temperature generally decreases with altitude. The reason is that the troposphere’s gases absorb very little of the incoming solar radiation. Instead the ground absorbs this radiation and then heats the tropospheric air by conduction and convection.
Why does air pressure decrease as altitude increases?
Earth’s gravity pulls air as close to the surface as possible. … As altitude increases the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by “thin air.” Thin air exerts less pressure than air at a lower altitude.
Why do temperatures decrease in the troposphere and increase in the stratosphere?
The troposphere is heated from the ground so temperature decreases with altitude. Because warm air rises and cool air sinks the troposphere is unstable. In the stratosphere temperature increases with altitude. The stratosphere contains the ozone layer which protects the planet from the Sun’s harmful UV radiation.
What is the relationship between temperature and height in the troposphere?
Temperature varies with altitude as follows: In the troposphere temperature decreases as altitude increases. In the stratosphere temperature generally increases as altitude increases due to the increasing absorption of ultraviolet radiation by the ozone layer.
Is troposphere the hottest layer of atmosphere?
In this part the temperature change varies day to day. The troposphere contains 75% of all the air in the atmosphere. 0-10 km from the ground is the troposphere. … In this layer UV rays cause ionization and the temperature increases with altitude here due to absorption of solar radiation making it the hottest.
What causes the temperature to increase with height through the stratosphere and decrease with height through the mesosphere?
The temperature increases in the stratosphere due to ozone layer capturing ultraviolet radiation. The temperature decreases in the mesosphere since there is no ozone and the amount of air is decreasing.
Why do temperatures increase in the stratosphere quizlet?
The temperature increases with increasing altitude in the stratosphere because there’s a high concentration of ozone molecules. These ozone molecules absorb UV rays from the Sun and then radiates this energy in the form of infrared waves. Nearby gases can absorb this infrared energy and increase in temperature.
Why the lower portion of the troposphere warmer than the upper portion quizlet?
Why is the bottom of the troposphere warmer than its top portion? Sunlight warms the surface of Earth and the heat is radiated back into the troposphere.
Why are clouds and weather restricted to the troposphere?
The air temperature begins to rise into the stratosphere. Such a temperature increasing prevents much air convection beyond the tropopause and therefore most weather phenomena including bearing clouds of thunderstorms cumulonimbus are confined to the troposphere.
How does temperature affect the air pressure?
Warm Temperatures Warm air causes air pressure to rise. When air molecules collide they exert force on each other. When gas molecules are heated the molecules move more quickly and the increased velocity causes more collisions. As a result more force is exerted on each molecule and air pressure increases.
Why is the troposphere important to weather on Earth?
MEMPHIS TN (WMC) -The troposphere is the lowest layer of Earth’s atmosphere and the site of all-weather on Earth. … Water vapor it important as it will absorb solar energy and thermal radiation from the surface of Earth thus regulating the air temperature.
Astronomy – Ch. 9.1: Earth’s Atmosphere (6 of 61) Atmospheric Temperature Gradient
Does temperature decrease with altitude?
Near the Earth’s surface air gets cooler the higher you climb. As you climb a mountain you can expect the air temperature to decrease by 6.5 degrees C for every 1000 meters you gain. This is called the standard (average) lapse rate. See also what is the definition of cultivate
What is the hottest part of the atmosphere?
The thermosphere is often considered the “hot layer” because it contains the warmest temperatures in the atmosphere.
Why is it Colder at Higher Altitudes?
Why is the lower portion of the troposphere warmer than the upper portion?
Although the sun light comes from the top to the bottom of the atmosphere the troposphere is primarily heated from the bottom. This is because the surface is much better at absorbing a wide range of solar radiation as compared to the air.
How does temperature change as you go higher and higher in the troposphere?
Temperatures drop as you move upward through the troposphere. … Higher up in the troposphere where less heat from the surface warms the air the temperature drops. Typically the temperature drops about 6.5° C with each increase in altitude of 1 kilometer (about 3.6° F per 1 000 feet).
How does temperature change in the troposphere differ from the stratosphere?
how does temperature change in the troposphere differ from the stratosphere? the temperature in the troposphere decreases while the temperature in the stratosphere increases because of the density of air molecules.
Why does air temperature and pressure decrease with altitude?
At higher elevations there are fewer air molecules above a given surface than a similar surface at lower levels. … Since most of the atmosphere’s molecules are held close to the earth’s surface by the force of gravity air pressure decreases rapidly at first then more slowly at higher levels. See also what is a mountain basin
Why does temperature decrease with altitude?
As you increase in elevation there is less air above you thus the pressure decreases. As the pressure decreases air molecules spread out further (i.e. air expands) and the temperature decreases. … The temperature in the troposphere — the lowest layer of the earth’s atmosphere — generally decreases with altitude.
How does the temperature decrease with altitude Class 9?
Most of the heating of the troposphere is caused by heating from the ground and not from direct heating by the Sun’s radiation. Thus the effect of this heating reduces as altitude increases. Moreover the dust particles are becomes negligible as one go higher up. This also reduces the temperature at higher elevation.
Why is the situation in the troposphere defined as unstable?
The situation in the troposphere is defined as unstable because the reaction of the natural atmospheric phenomenon like climate temperature humidity rainfall etc. are not realists predictable and stable. And all weather and atmospheric activities (thunder storm rainfall clouds formation etc.)
Why does weather occur in the troposphere?
All weather occurs in the troposphere because it has a gradient of temperature and water vapor gases and particulate matter accumulate in this layer….
Why does air pressure decrease from the troposphere to the exosphere?
Chuck W. Atmospheric pressure in the troposphere drops by about 1 inch of mercury for every thousand feet of altitude above sea level. Gravity of the earth holds our atmosphere close to the surface so the density (and pressure) of air gets gradually lower as you go to higher altitude.
Why do temperatures increase in the stratosphere?
The pattern of temperature increase with height in the stratosphere is the result of solar heating as ultraviolet radiation in the wavelength range of 0.200 to 0.242 micrometre dissociates diatomic oxygen (O2). The resultant attachment of single oxygen atoms to O2 produces ozone (O3).
How does the temperature change in the stratosphere?
In the stratosphere temperature increases with altitude. … A layer of ozone molecules absorbs solar radiation which heats the stratosphere. Unlike in the troposphere the air in the stratosphere is stable because warmer less dense air sits over cooler denser air.
Why temperature decrease with Altitude?
Layers of the atmosphere- Includes temperature and atmospheric pressure
At what temperature does the troposphere decrease?
On the basis of mean tropospheric depth the average rate of temperature decrease is 3.6 degrees F per 1 000 ft. (6.5 degrees C per km.) a measurement known as the normal lapse rate.
What are the hottest and coldest layers of the atmosphere?
Coldest layer of Earth’s atmosphere is the MESOSPHERE. The temperature there is -90 degree celsius. It can even go lower. Hottest layer of Earth’s atmosphere is the thermosphere.
How does the composition of the troposphere change with a change in latitude?
Therefore as your latitude increases the pressure drops. This drop in pressure also results in a drop in the heights of the different levels of the atmosphere. For example the tropopause (the layer between the troposphere and stratosphere) is about twice as high at the equator than it is at the poles. See also what did the american renaissance in literature reflect