Troposphere The word troposphere comes from tropein, meaning to turn or change. All of the earth s weather occurs in the troposphere.
{"Image DocumentName": "TroposphereThe word troposphere comes from tropein, meaning to turn or change. All of the earth s weather occurs in the troposphere.", "Image ImageDescription": "The troposphere has the following characteristics: It extends from the earth s surface to an average of 12 km (7 miles). The pressure ranges from 1000 to 200 millibars (29.92 in. to 5.92 in.). The temperature generally decreases with increasing height up to the tropopause (top of the troposphere); this is near 200 millibars or 36,000 ft. The temperature averages 15\u00b0C (59\u00b0F) near the surface and -57\u00b0C (-71\u00b0F) at the tropopause. The layer ends at the point where temperature no longer varies with height. This area, known as the tropopause, marks the transition to the stratosphere.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}