Ch2 Flashcards
Climate
Composition pattern of long term weather conditions over a given region(average weather, yearly cycles not day to day) “normal” values are derived from a 30 year average. Latest is 1981-2010
Steady state of gas
Input rate=output rate
Gas residence time
Average length of time individual molecule remains in atmosphere
Most abundant permanent gas in atmosphere
1st Nitrogen(N2) 2nd Oxygen(O2) 3rd Argon (Ar)
Variable gases
Distribution in the atmosphere varies in both time and space. —Water vapor, carbon dioxide, Ozone, Methane—
Most abundant variable gas
Water vapor
Troposphere
Lowest layer of atmosphere. Generally a steady decrease in temperature with height. “The weather sphere”
Stratosphere
Absorption of ultraviolet radiation by ozone->temperature increase with height. Little actual weather but violent up drafts in the strongest thunderstorms may penetrate the stratosphere
Ionosphere
Where the northern and southern lights occur. Large number of ions.
Weather
State of atmosphere at any particular place and time( general minutes to days)