Stratosphere
The stratosphere is the second major layer of Earth's atmosphere, lying above the troposphere and below the mesosphere. Here is a detailed overview of the stratosphere based on the specific aspects you've inquired about:
Definition
The stratosphere is characterized by a temperature inversion, where the temperature increases with altitude, contrary to the troposphere below it. This layer is stratified in temperature, with warmer layers higher up and cooler layers closer to the Earth's surface[5]. The stratosphere is dynamically stable due to this temperature structure, which inhibits regular convection and associated turbulence[5].
Height
The stratosphere extends from the top of the troposphere to about 30 miles (50 kilometers) above the Earth's surface[1][2]. The lower boundary of the stratosphere, known as the tropopause, varies in altitude depending on geographical location and season, ranging from about 6 miles (10 kilometers) at the poles to about 11 miles (17 kilometers) at the equator[13][14].
Temperature
Temperatures in the stratosphere can rise as high as 0 °C (32 °F) near its upper boundary[3]. The temperature increase with altitude is due to the absorption of the Sun's ultraviolet radiation by the ozone layer, which converts it into heat[5]. The top of the stratosphere has a temperature of about 270 K (−3°C or 26.6°F)[5].
Importance
The stratosphere is critically important for several reasons:
- Ozone Layer: It contains the ozone layer, which is essential for life on Earth as it absorbs harmful ultraviolet rays from the Sun[4][8]. The ozone layer is located approximately 20 to 30 kilometers (12 to 19 miles) above the Earth's surface[12].
- Aviation: Commercial airplanes typically fly in the stratosphere to avoid weather disturbances and turbulence present in the troposphere, which makes for smoother and more efficient flights[4].
- Climate and Weather: Although the stratosphere is generally stable, it does play a role in climate and weather patterns. For example, the Quasi-Biennial Oscillation (QBO) is a periodic fluctuation in the stratosphere that can influence weather[1].
In summary, the stratosphere is a stable layer of the atmosphere with a temperature inversion, extending from about 6 to 30 miles above the Earth's surface. It houses the ozone layer, which protects life on Earth from the Sun's ultraviolet radiation, and provides a smooth flying altitude for commercial aviation.
Citations:
[1] https://www.merriam-webster.com/dictionary/stratosphere
[2] https://www.noaa.gov/jetstream/atmosphere/layers-of-atmosphere
[3] https://www.britannica.com/science/atmosphere/Stratosphere-and-mesosphere
[4] https://byjus.com/social-science/stratosphere/
[5] https://en.wikipedia.org/wiki/Stratosphere
[6] https://scied.ucar.edu/learning-zone/atmosphere/layers-earths-atmosphere
[7] https://www.sciencedirect.com/topics/earth-and-planetary-sciences/stratosphere
[8] https://study.com/learn/lesson/what-is-stratosphere-facts-characteristics.html
[9] https://scied.ucar.edu/learning-zone/atmosphere/stratosphere
[10] https://www.nasa.gov/image-article/earths-atmospheric-layers-3/
[11] https://www.cpc.ncep.noaa.gov/products/stratosphere/temperature/
[12] https://www.earth.com/news/new-study-of-earths-stratosphere-has-important-implications-for-life-on-earth/
[13] https://www.britannica.com/science/stratosphere
[14] https://earthhow.com/stratosphere/
[15] http://www.ccpo.odu.edu/SEES/ozone/class/Chap_6/6_2.htm
[16] https://uk-air.defra.gov.uk/research/ozone-uv/ozone-concerns
[17] https://spaceplace.nasa.gov/stratosphere/en/
[18] https://www.albany.edu/faculty/rgk/atm101/structur.htm
[19] https://dictionary.cambridge.org/us/dictionary/english/stratosphere
[20] https://niwa.co.nz/education-and-training/schools/students/layers
[21] https://www.merriam-webster.com/dictionary/the%20stratosphere
[22] https://www.dictionary.com/browse/stratospheric