The tropopause occurs at
approximately 20,000 feet over the poles
and at approximately 60,000 feet above the equator. The International Standard Atmosphere (ISA) assumes that the average height of the tropopause is 36,000 feet.
What is the height and temperature of the tropopause?
tropopause:
about 12-18 km about –60
stratopause: about 46-54 km about –2 to 0 mesopause: about 85-90 km about –90 4. 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.
What is the height of the tropopause in KM?
The height of the top of the troposphere varies with latitude (it is lowest over the poles and highest at the equator) and by season (it is lower in winter and higher in summer). It can be as
high as 20 km (12 miles or 65,000 feet)
near the equator, and as low as 7 km (4 miles or 23,000 feet) over the poles in winter.
How do you find the height of the tropopause?
To locate the tropopause, we just need to look for
the bottom of the very thick isothermal layer that is near a pressure altitude of 40 to 20 kPa
. Figure 5.18 Sample atmospheric sounding having two isothermal layers and one temperature inversion.
Why is the height of tropopause over the equator?
This site says that the tropopause is at a higher altitude at the equator because:
Gravitational force from a point is higher closer to it and reduces with increasing distance from it
. Because the Earth itself is broader at equator, the equator experiences less gravity allowing air to reach bigger heights.
What affects tropopause height?
The temperature ceases to decrease with height at the boundary of the tropopause. The height of the tropopause varies with
latitude, season of the
year, and the weather conditions. The tropopause is lowest over the poles (approximately 26 000 ft or 8 km) and highest over the equator (approximately 52 000 ft or 16 km).
Do planes fly in the tropopause?
The boundary between the troposphere and the stratosphere is known as the Tropopause and is covered by a separate article.
Most light aircraft and turboprop aircraft fly within the
troposphere and this is where most of the water vapour and therefore cloud formation exists.
What is the temperature of mesopause?
Temperature decreases with height throughout the mesosphere. The coldest temperatures in Earth’s atmosphere,
about -90° C (-130° F)
, are found near the top of this layer. The boundary between the mesosphere and the thermosphere above it is called the mesopause.
What is the relationship between temperature and height in exosphere?
Temperatures increase again with altitude in
the thermosphere, which begins about 80 kilometers (50 miles) above the Earth. They can rise to 2,000°C (about 3600°F). The exosphere begins at 500 to 1,000 kilometers (about 310-621 miles) and the few particles of gas there can reach 2,500°C (about 4500°F) during the day.
What layer do humans live?
We humans live in
the troposphere
, and nearly all weather occurs in this lowest layer. Most clouds appear here, mainly because 99% of the water vapor in the atmosphere is found in the troposphere. Air pressure drops, and temperatures get colder, as you climb higher in the troposphere.
What is the height of the thermosphere?
The thermosphere starts just above the mesosphere and extends
to 600 kilometers (372 miles) high
. Aurora and satellites occur in this layer.
In which two spheres the temperature increases with the height?
Answer:
The thermosphere
is often considered the “hot layer” because it contains the warmest temperatures in the atmosphere. Temperature increases with height until the estimated top of the thermosphere at 500 km.
How high is the troposphere in miles?
The troposphere begins at the Earth’s surface and extends from
4 to 12 miles
(6 to 20 km) high. The height of the troposphere varies from the equator to the poles.
Why do pilots need to know the height of the tropopause?
The location of the tropopause is of interest to flight crew because it
indicates the altitude at which temperature becomes constant with increasing altitude
, which is an import factor in performance and fuel calculations.
What is the average height of troposphere Class 7?
Troposphere: This layer is the most important layer of the atmosphere. Its average height is
13 km
. The air we breathe exists here. Almost all the weather phenomena like rainfall, fog and hailstorm occur in this layer.
What is normal lapse rate?
The lapse rate of nonrising air—commonly referred to as the normal, or environmental, lapse rate—is highly variable, being affected by radiation, convection, and condensation; it averages
about 6.5 °C per kilometre (18.8 °F per mile)
in the lower atmosphere (troposphere).
