What does tropopause and stratopause mean?
The stratosphere is the layer of Earth’s atmosphere immediately above the troposphere; it extends from a lower boundary (the tropopause) whose altitude varies between about 8 and 16 km to an upper boundary (the stratopause) near 50 km.
What is a tropopause troposphere?
Definition. The tropopause is the upper limit of the troposphere and therefore constitutes the boundary between it and the Stratosphere. This second tropopause may be either within or above the 1 km layer. Near the mid-latitudes there may be two layers of tropopauses: polar and tropical.
Why is the tropopause isothermal?
troposphere, which is called the tropopause, temperatures have fallen to about −80 °C (−112 °F). …of the troposphere, called the tropopause, corresponds to the level in which the pattern of decreasing temperature with height ceases. It is replaced by a layer that is essentially isothermal (of equal temperature).
What is stratopause and Mesopause?
is that stratopause is in the atmosphere, the boundary between the stratosphere and the mesosphere while mesopause is in the atmosphere, the boundary between the mesosphere and the ionosphere it is the atmospheric boundary where the temperature reaches its minimum value.
What is stratopause short answer?
The stratopause (formerly mesopeak) is the level of the atmosphere which is the boundary between two layers: the stratosphere and the mesosphere. In the stratosphere, the temperature increases with altitude, and the stratopause is the region where a maximum in the temperature occurs.
What is meant by stratopause?
Definition of stratopause : the transition zone between the stratosphere and the mesosphere : the upper boundary of the stratosphere.
What is stratopause in geography?
The stratopause (formerly mesopeak) is the level of the atmosphere which is the boundary between two layers: the stratosphere and the mesosphere. On Earth, the stratopause is 48–55 km (30–34 mi) above sea level.
What is the definition of stratopause in geography?
Where is the stratopause?
stratosphere
The stratopause caps the top of the stratosphere, separating it from the mesosphere near 45–50 km (28–31 miles) in altitude and a pressure of 1 millibar (approximately equal to 0.75 mm of mercury at 0 °C, or 0.03 inch of mercury at 32 °F).
Why is the stratopause so warm?
The increased temperature in this layer is due mainly to UV absorption by various chemical species, including ozone and molecular oxygen present in the stratosphere. Maximum heating takes place in the upper part of the stratosphere.
Why is the stratopause warmer?
In the stratopause, the temperature reaches a peak because of the heating generated by the absorption of ultraviolet radiation by ozone molecules in the stratospheric ozone layer. …
What is the meaning of tropopause?
Definition of tropopause : the region at the top of the troposphere also : a comparable layer of a celestial body Examples of tropopause in a Sentence
What is the definition of stratopause in English?
Definition of stratopause. : the transition zone between the stratosphere and the mesosphere : the upper boundary of the stratosphere. You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Is the tropopause a hard or soft boundary?
The tropopause is not a “hard” boundary. Vigorous thunderstorms, for example, particularly those of tropical origin, will overshoot into the lower stratosphere and undergo a brief (hour-order or less) low-frequency vertical oscillation.
What does a drop of the dynamical tropopause mean?
As this surface represents the transition between the low values of PV in the troposphere and the high values in the stratosphere, a drop of the dynamical tropopause signals an air intrusion characterized by a maximum of potential vorticity (as shown in Figure 1.6 ).