Modesto2 From United States of America, joined Jul 2000, 2842 posts, RR: 5 Posted (13 years 18 hours ago) and read 5330 times:
Can someone please explain "tropopause height"? I've seen it in the context of flight plans and MCDU entries. My vague understanding of the term deals with weather predictions. In any case, can someone please enlighten me? Thank you.
Dknhawkins From United States of America, joined Nov 2000, 13 posts, RR: 0
Reply 1, posted (13 years 14 hours ago) and read 5313 times:
Well to answer your question it is hard to say. You start with the Troposphere, varies with temperature and location, higher in the summer and at the equator, lower at the poles. At the equator, it usually extend to between 50 and 60 thousand feet, at the poles its 20 to 30 thousand feet. The Tropopause is the boundary between the Troposphere and the Stratosphere. It acts like a lid to keep most of the earth's moisture, and weather in the Troposphere. It is where the jetstream is. And the jetstream, as you know is a narrow band of high speed wind 50-150 kts. that meanders in and around the Tropopause. Then it goes Stratosphere, Mesophere and Thermosphere. I hope that helps
MD11Nut From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 13 hours ago) and read 5303 times:
Tropopause (height) is when the temperature is considered constant (stops becoming colder as you go higher). In real life it varies but for most FMS, it usually is fixed at 36,089 ft. Some FMS allows pilots to input a tropopause altitude.