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The gas layers of the troposphere are less dense at the geographic poles and denser at the equator, where the average height of the tropical troposphere is 13 km, approximately 7.0 km greater than the 6.0 km average height of the polar troposphere at the geographic poles; therefore, surplus heating and vertical expansion of the troposphere ...
The troposphere is the lowest layer of the Earth's atmosphere; it starts at the planetary boundary layer, and is the layer in which most weather phenomena occur. The troposphere contains the boundary layer, and ranges in height from an average of 9 km (5.6 mi; 30,000 ft) at the poles, to 17 km (11 mi; 56,000 ft) at the Equator.
The stratospheric vortex's SSWs were discovered in 1952 with radiosonde observations at altitudes higher than 20 km. [3] The tropospheric polar vortex was mentioned frequently in the news and weather media in the cold North American winter of 2013–2014, popularizing the term as an explanation of very cold temperatures.
The troposphere is denser than all its overlying layers because a larger atmospheric weight sits on top of the troposphere and causes it to be most severely compressed. Fifty percent of the total mass of the atmosphere is located in the lower 5.6 km (3.5 mi; 18,000 ft) of the troposphere.
The tropics are the regions of Earth surrounding the equator, where the sun may shine directly overhead.This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead.
Maps show NOAA's spring weather outlook across U.S. Nikki Nolan. Updated February 21, 2025 at 12:36 PM. ... CBS News. SpaceX Starship breaks apart after launch in second failure in a row.
A map claiming to show the areas of the US that may be targeted in a nuclear war that originally circulated in 2015 is making the rounds again, amid the Russian war in Ukraine.. The map indicates ...
Of the vertically developed clouds, the cumulonimbus type is the tallest and can virtually span the entire troposphere from a few hundred metres above the ground up to the tropopause. [33] It is the cloud responsible for thunderstorms. Some clouds can form at very high to extreme levels above the troposphere, mostly above the polar regions of ...