Planetary Atmospheres. Terrestrial Planets Venus Completely cloud shrouded Surface atmospheric pressure 100 times Earth’s Surface temp: 870 o F.
Post on 20-Dec-2015
215 Views
Preview:
Transcript
Planetary AtmospheresPlanetary Atmospheres
Terrestrial PlanetsTerrestrial Planets
VenusVenus
Completely cloud Completely cloud shroudedshrouded
Surface Surface atmospheric atmospheric pressure 100 pressure 100 times Earth’stimes Earth’sSurface temp:Surface temp:
870870oo F F
MarsMars
Extremely thin Extremely thin atmosphereatmosphere
Surface pressure Surface pressure .007 times Earth.007 times Earth
Surface Surface Temperature Temperature
-58-58oo F F
Gaseous atmosphere
No real ‘surface’
Liquid and metallic
hydrogen interior
Earth sized core
JupiterJupiter
Holding an AtmosphereHolding an Atmosphere
A bunch of Hydrogen gas (very light) and a A bunch of Hydrogen gas (very light) and a bunch of Carbon Dioxide gas (very massive) bunch of Carbon Dioxide gas (very massive) are at the same are at the same temperaturetemperature. Which has . Which has the greatest the greatest velocityvelocity? ?
A.A.HydrogenHydrogen
B.B. Carbon DioxideCarbon Dioxide
C. They have the same velocity.C. They have the same velocity.
Kinetic EnergyKinetic Energy
Which has more Kinetic Energy?
A) Bowling BallB) BaseballC) They have the same amountD) Can’t tell
Thermal EnergyThermal Energy
TemperatureTemperature: : The averageThe average kinetic energykinetic energy of a of a collection of particlescollection of particles
Gas PressureGas Pressure
Atmospheric pressureAtmospheric pressure
Planetary TemperaturePlanetary Temperature
Planetary TemperaturePlanetary Temperature
Planetary TemperaturePlanetary Temperature
Hot Things Emit LightHot Things Emit Light
Hotter = MORE lightHotter = MORE light
Hotter = Bluer LightHotter = Bluer Light
Planetary TemperaturePlanetary Temperature
Energy in = Energy out
Planetary TemperaturePlanetary Temperature
Planetary TemperaturePlanetary Temperature
Terrestrial Planets emit Terrestrial Planets emit PRIMARILY Infrared lightPRIMARILY Infrared light
The AtmosphereThe Atmosphere
The atmosphere passes visible The atmosphere passes visible lightlight
And absorbs infrared lightAnd absorbs infrared light
Greenhouse EffectGreenhouse Effect
Yum!IR Photons!
Greenhouse EffectGreenhouse Effect
The greenhouse effect keeps a planet The greenhouse effect keeps a planet warmer than it would be without and warmer than it would be without and
atmosphereatmosphere
VISIBLEVISIBLE light passes through the light passes through the atmosphereatmosphereThe ground The ground ABSORBS ABSORBS the visible light the visible light and warms upand warms up
The warm ground The warm ground EMITS EMITS primarily in primarily in the IRthe IRGreenhouse gasses Greenhouse gasses ABSORB ABSORB IR light, IR light, effectively trapping some of the energyeffectively trapping some of the energy
Atmospheric COAtmospheric CO22
Global WarmingGlobal Warming
The ‘Hockey Stick’The ‘Hockey Stick’
MoulinMoulin
GreenlandGreenlandGreenland’s ice would raise ocean levels Greenland’s ice would raise ocean levels
20 feet20 feet
Larson Ice ShelfLarson Ice Shelf
BreidamerkurjökullBreidamerkurjökull
This glacier in Iceland has receded 2km This glacier in Iceland has receded 2km since 1973since 1973
19731973 20002000
Pasterze GlacierPasterze Glacier
18751875 20042004
PermafrostPermafrostPermafrost is melting in several areas. Permafrost is melting in several areas.
The resulting bogs produce methane.The resulting bogs produce methane.
Denali Park, Denali Park, AlaskaAlaska Abisko National Park, Abisko National Park,
SwedenSweden
TemperatureTemperature
Measures average KINETIC Measures average KINETIC energyenergy
top related