We clouds have an albedo of 0.8 the same as snow and ice.
For example clouds and ice have high albedo because they can easily reflect incoming solar radiation
Albedo is the quality of a surfaces reflective-ness. Albedo is measured on a scale from 0-1.
The Ozone layer also absorbs most ultraviolet radiation from the sun.
Something like this rock is a great example of something with a low albedo it absorbs the suns radiation and has little reflective-ness
I, a rock have a low albedo so I absorb incoming radiation and emit Infrared radiation.
I'm visible light!
Visible light is the most abundant radiation that we get from the sun, it has more energy and shorter wavelengths than infrared radiation, which is what the ground emits after absorbing other radiation.
Here we have 2 types of radiation, visible light shown in black. and Infrared radiation shown in red.
I'm infrared radiation!
something that can get in the way of Infrared radiation getting out is greenhouse gasses.
Infrared radiation can leave earth atmosphere if nothing is in the way.
Another greenhouse gas is nitrogen shown in blue but this gas allows the infrared radiation to go through it. Infrared radiation is heat in our atmosphere and the gasses keeping it in allow heat to rise and gasses that let it out allow heat to drop a little.
the greenhouse gas CO2 shown above in grey and red can block outgoing infrared radiation. CO2 can absorb and re emit infrared radiation waves.
Another gas that I will go over is methane which is another gas in our atmosphere, methane is produced by raising livestock.
The last gas that I will go over in CO2 which is produced in a number of human activities. It can be produced in the burning of fossil fuels or wood so naturally we have a lot of CO2 in our atmosphere.
Another gas in our atmosphere is nitrous oxide which can be produced by agriculture.
In the 4th slide I went over how CO2 absorbs and re emits infrared radiation, and that infrared radiation is heat. if we have more CO2 in the atmoshere the less infrared can get out. which brings up the earths average temp.
In the past the CO2 levels never exceeded 300 ppm in 1950 but today the CO2 levels are just under 420 ppm.
The amount of CO2 in our atmosphere is constantly changing it hits a low about every 50,000 years, right now we are at an all time high due to all of the fossil fuel burning.