Layers of Atmosphere

Troposphere

Temp decreases as altitude increases (ELR)

Most weather found here

Troposphere Characteristics

Temperature gets colder the higher you go

Most WV found here - instability creates clouds and rain

Has 70% of total atmospheric mass due to air

Tropopause

Temperature is controlled by its height

Higher it is, colder it gets

temp is constant (isothermal)

Higher in summer, lower in winter (warm air expands, cold contracts)

Stratosphere

• Lack of change in temp, especially in lower layer

• Temp of Strat rises in upper levels because of Ozone (In stratosphere)

• Ozone absorbs harmful UV light from sun

Stratopause

• Boundary between stratosphere and mesosphere

• Temperature stops increasing (isothermal region)

• Located around 50 km

• Marks the top of the ozone‑heated stratosphere

Mesopshere

Temperature cools through

Aurora clouds found here

has meteoric dust particles

Mesopause

Boundary between mesosphere and thermospshere

Coldest point in atmosphere (-90)

Temp stops decreasing

Located around 80-90km above

Thermosphere

Increase of temp due to UV radiation

Ionosphere - +vely charged molecules, influences radio wave propagation