what is the mechanism of global warming?

Question

what is the relation between global warming and greenhouse effect?please describe the main mechanism of greenhouse effect.

Answer 1

The Sun sends solar radiation to Earth. The Earth then emits an equal amount of radiation back out in to space. Green house gases effect this by sending some of the radiation back to Earth a second time. Visible light is of short wave length. As it is absorbed by the earth's surface and re-emitted, it is send back as IR radiation (heat, which has a longer waave length. This longer wave length can be intercepted by GHG's. They send them back out in all directions with about 50% of them reaching the Earth's surface a second time, heating it again.

Without GHG's, the Earth's surface would be -19 degrees C. so the natural green house effect keeps the Earth habitable. When we effect (increase) the levels of GHG's it increases the temperature.

Answer 2

There are some great answers here that explain the mechanisms of global warming.

I would like to point out just a little of the controversy about the working of the mechanism. There is still debate as to whether the greenhouse effect is a globalized phenomena or just a localized event. The controversy has to do with the fact that most of the earth is covered by ocean (unlike say the planet Venus.) So the greenhouse effect has a localized effect but eventually dissipates and the oceans are like sinks that absorb CO2.

The current theory depends on the notion that more CO2 is being produced than can be absorbed by nature. This is yet to be proved. Another controversy is the importance of CO2 in driving the entire climate of the globe. If it were that easy, all we would need to do is control CO2 and then we control the weather!

To really understand the process, one needs to understand atmospheric science, quantum mechanics of radiation absorption, chemistry of the carbon cycle, and even a smattering of astrophysics. No matter which side of the debate you are on, you may really enjoy looking into and researching your topic deeper and learning science. In a scientific debate, everyone wins as we get closer to approaching the truth. Have fun!

Answer 3

Jaccob pretty much answered your question about the greenhouse effect. But the relationship with global warming is not quite clear. While we know there is a greenhouse effect on Earth, we don't know exactly how much heat we get from it. Some estimates are as low as 14 degrees or as high as 30 degrees. There are several heat retaining and redistributing mechanisms apart from the greenhouse effect or direct heating from the Sun that we simply haven't been able to quantify Until we are able, taking action based on an oversimplified model may end up being counterproductive.

Answer 4

The global warming is also called Green House Effect.The word green house effect was first coined by J.Fourier in 1827.
A green house is a body which allows the short wavelength incoming solar radiation to come in, but does not allow long wave outgoing terrestrial infra red radiations to escape.The earth's atmosphere bottles up the energy of the sun and it acts like a green house, where CO2 acts like a glass window.CO2 and water vapours in the atmosphere transmit short wavelength solar radiation but reflect longer wave length.CO2 molecules are trasparent to sunlight but not to heat radiation.So they trap and re-enforce the solar heat stimulating an effect which is popularly known as Global Warming.

Answer 5

The warming of the atmosphere by the trapping of longwave radiation being radiated to space. The gases most responsible for this effect are water vapor and carbon dioxide.
They allow short wavelength solar radiation to reach the Earth but retain radiation of longer wavelength, which causes warming of the atmosphere. Water vapour, carbon dioxide, methane and nitric oxide are the main greenhouse gases.

Answer 6

Bottom line - it has to do with the fact that the forests have been cut down little by little over time - it has to do with greenhouse gases that accumulate in the atmosphere - primarily in places where there are not trees. Trees help deal with the harmful gasses, and that's part of how it was meant to be dealt with, but over time those trees were cut down and not reforested, etc. That's the simplest way I know to put it. All the global warming efforts are in the area of conservation which is stupid, because that's not going to help that much and that's not helping deal with the problem. The problem is we've been cutting down trees and not reforesting. If you look in my town you will see they just cut down a bunch of trees and built a new shopping center. in 30 years they cut down more trees and build another shopping center, but they never reforest - they keep doing stuff like this for 300 years and then look - no trees. Then all kinds of poisonous harmful gasses come our way - that the trees were put on this earth to deal with. see what I mean?

I don't know how to answer your question exactly - maybe someone else can help you.

Are you a child? I think people who are children trying to get us to do their homework for them should at least tell us they are a child and all that. So that we know. I don't think kids should have everyone else doing their work for them. It's a smart idea, but you don't learn by having other people doing for you all the time. You just learn to have people do things for you.

Answer 7

simply put, the greenhouse effect is what makes global warming possible. it's just this thing that traps carbon dioxide in the atmosphere which makes the planet warmer.

Answer 8

greenhouse effect is called in other ways global warming.Greenhouse gases are the main causes.the greenhouse gases are released by us and the vehicles.The gases are carbon monoxides,carbondioxide,sulpher dioxide,AEROSOLS AND CFCs(chloro fluro carbons). the gases are released into the atmospere and it makes a hole in the OZONE LAYER which protects us from UV rays released by the sun so the heat generally recieved is higher and bcoz of that the glaciers start melting.

Answer 9

the two answers are correct. Because the trees the absorber of carbon dioxide is cut down. Carbon dioxide now houses the earth and with the large hole in the ozone layer. UV rays of the sun nows makes the earth more hotter.

Answer 10

Our burning of fossil fuels will enhance the quantity of carbon dioxide (CO2) in air, which holds warmth interior the ambience, so the oceans gradually heat up liberating extra carbon dioxide, (because of fact heat water holds much less CO2 as less warm water), which makes air warmer, which heats the Earth extra, which reasons extra CO2 to be released, etc etc. yet another occasion: added CO2 makes the air carry extra warmth; bugs that used to die in chilly climate stay longer and reproduce plenty extra they kill bushes that used to make cool forests yet whilst they are lifeless, they enable the land heat extra, which inspires extra bugs, which kill extra bushes which warms the land extra, etc etc yet another occasion: added CO2 warms air and oceans which soften polar ice which used to mirror away image voltaic (the albedo result) even though it gets replaced by making use of dark water which absorbs warmth, expanding the melting of the ice, which will enhance the quantity of water which absorbs warmth , which melts extra ice, etc etc final occasion: The warming melts the arctic tundra which then releases bubbles of methane that's an outstanding better greenhouse gas than CO2, so it absorbs extra warmth from the solar, melting extra arctic tundra, liberating extra methane, etc etc. wish this helps.