the.com/troposphere
the only sky layer that bothers with weather, and the one keeping you alive
means The lowest layer of Earth's atmosphere, where nearly all weather happens and where we breathe, extending from the ground up to about 7–20 kilometers depending on latitude.
from From the Greek 'tropos,' meaning 'turn' or 'change,' joined to 'sphaira,' a ball or globe — literally the 'sphere of change,' aptly named for the layer where air churns, mixes, and turns over endlessly. The naming belongs to the early 20th century, when scientists sounding the upper air discovered distinct atmospheric layers and needed words for each; 'troposphere' arrived alongside its calmer neighbor, the 'stratosphere.'
- name origin
- Greek tropos, meaning turn or mixing
- holds it all
- contains roughly 75% of atmosphere's mass
- thinner up north
- shrinks to 7km at poles, 20km at equator
- cold ceiling
- top hits around minus 60 degrees Celsius
- weather zone
- nearly all clouds and storms live here
mount everest summit — air pressure is 34% of sea level, oxygen requires supplemental tanks above 8,000m
concorde aircraft cruising — flew at 60,000 feet (18,288m), near the tropopause boundary where troposphere ends