The Sun, like the Earth, goes through a series of cycles. These cycles interact with each other and the net effect can be one of either warming or cooling. At the moment, the sum of all these cycles is a slightly negative one meaning that the Earth should be cooling very slightly. However, temperatures are presently rising faster than have ever before been known.
We have ground based and satellite based instruments that accurately measure the amount of heat coming from the Sun (often referred to as Total Solar Irradiance or TSI) and for some 30 years now there has been almost no change (a very slight drop in energy received but not enough to significantly affect the climate).
People are affecting the climate and this is because our actions lead to the emission of large quantities of greenhouse gases. These gases include carbon dioxide, methane and nitrous oxide and are so called because they have the ability to retain heat within our atmosphere and so cause it to warm up. Since the onset of industrialisation there has been a massive increase in the atmospheric concentrations of these gases - some 40% all told. We've now pushed levels of these gases to a higher point than has ever before been known during all the time that humans have been around.
The reason these gases trap heat (in a simplified way) is because themral radiation emitted by the planet and everything on it has the same longwave frequency that corresponds to the greenhouse gases. They are able to absorb these packets of heat energy and subsequently re-radiate them back outwards. So instead of just disappearing off into space, some of the heat is getting trapped and emitted back down to Earth again. Put simply, the more greenhouse gases there are the more heat is retained.
Very, very few scientists hide the truth. This is a misconception put about by some skeptics in order to discredit the scientists. The basics of global warming are so simple that they can be demonstrated to anyone in just about any lab, the facts are something that can't be hidden.
There are a small number of 'scientists' that oppose the theory of manmade global warming but the number is very small. There are tens of thousands of suitably qualified scientists around the world, probably no more than a hundred of them question the theory of manmade global warming and a sizeable number of those that do have links to the oil and power companies.
There are a lot of lies and a lot of misinformation being spread around by certain skeptics. In order to arrive at the right conclusion you should be careful where you get your information from - stick with educational and government websites such as NASA, Stanford Solar Center, the Hadley Centre etc and ignore personal blogs and the like.
2007-12-15 07:45:15
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answer #1
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answered by Trevor 7
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SCIENCE HAS BEEN INVADED WITH POLITICS AND HUMAN EMOTIONS
The truth is being distorted at high levels,
And lies have been weaved in.
Some of the real dangers are being hidden because there are no solutions , Public could panic.and Authorities would loose control .
Others facts are exaggerated so that the phenomena can be used to milk the people.
This is further complicated with Arrogance that will not admit that mankind could be guilty, or that Gods could be out of control ,unloving or incompetent.
Global Warming is true, there are Natural fazes but we are affecting that to a great extent ,with deforestation ,desertification and pollution., especially air pollution.
I do not think we can make a real difference anymore to change the tide.
On a Global scale,Humanity is not co operative enough .
The poor regions have other priorities such as daily survival.
There is a lot we can do about being more responsible with what we got ,
but In the first world countries many do not care or are more interested in Global Control than Global Warming.
On this forum the attitudes of Those who wish to be frugal with our natural resources and want to preserve the Nature that is left ,
are replaced by those who wish to exploit it.
I just had a violation notice for a Best Answer,on evidences of Global warming.(things that are happening today in China,Africa and Mexico) And other have been simply deleted.
So do not expect the truth this has become politically incorrect.
And listen to Trevor he does not speak with a forked tongue.
2007-12-15 07:48:33
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answer #2
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answered by Anonymous
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I used to believe that CO2 hypothesis made sense. However, I took the time to do my own review of the scientific literature, the IPCC report and the facts that support the CO2 hypothesis.
I found that there is some evidence that supports the claim that the earth is getting warmer but there is zero evidence that supports the claim that CO2 is the sole cause of it. The argument that we don't have any other explaination for the warming is not really an argument because there is so much we don't understand about climate. For example, others have claimed that it can't be the sun but recent discoveries have shown that the sun affects the number of clouds in the sky. This is new scientific knowlegde that no one could have predicted 10 years ago. This example demonstrates why it is a mistake to assume that we know all of the answers.
You also must take into account that global warming is big business now. There are many companies seeking to cash in green technologies and various environmental groups that depend on global warming as a way to boost their donations. There is no such thing as a scientist whose opinions are not biased by their source of funding. You must take this into account whenever you hear a scientist claiming that something is a "fact".
2007-12-15 09:49:57
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answer #3
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answered by Raven 2
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Firstly, it's not an opinion, it's a conclusion.
The sun DOES get hotter and colder naturally. However, the amount is not nearly enough to explain this level of warming on Earth.
There is incredibly strong evidence that human activity is at least speeding up, if not causing, climate change.
People who argue against the theory of climate change seem to like to claim that we scientists only get funding if we believe global warming is true. That could not be farther from the truth.
2007-12-15 07:23:27
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answer #4
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answered by Scott Evil 6
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The true answer is probably a combination of a lot of things.
The AGW fanatics would like to cease all debate and just start throwing money at any proposed solution that they can dream up (the money would also pay their bills nicely). They have proposed artificial volcanoes to spew more pollutants into the air to block out the sun, dump iron and urine in the ocean to cause rampant algae growth, and more insane ideas.
http://www.foxnews.com/story/0,2933,259590,00.html
It is interesting that much of the supposed "solved science" has been over turned and proven untrue. Yet they continue to claim the science is complete. The science has barely begun. They draw their conclusions not from scientific experiments, but from computer models which are programed to show CO2 as the primary driver of temp. The problem is their models are continually proven wrong as time passes.
Most "AGW deniers" do say the globe is warming, as science has proven this. But, they differ in that many say the science is to new to know anything for sure, or they reject the claim made that we are responsible. My feeling side with this group. Mostly because the science points toward this conclusion, and they use field studies in nature as opposed to computer models (ever hear of GIGO?) Also, this group is willing to debate the issue as all scientist should. They also do not use scare tactics like the first group. Anyone hear about sea rise because of glacier melting? This claim has been repeated so many times that people believe it to be true. but even the IPCC does not contend this will happen. what they say are sea levels will rise because of the expansion of water due to heating effects. But, they do nothing to dispell this myth. Seems to me that is the same as hiding the facts. And when someone is hiding facts, I have learned not to trust them.
2007-12-15 16:39:24
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answer #5
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answered by CrazyConservative 5
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Up until the last few years, it was quite acceptable for a scientists to say he didn't think humans were responsible for global warming and a lot did say that. That has all changed and the process has become highly political.
The sun is a likely candidate for causing global warming. In the short time that we've been measuring it, the strength of the sun has not been constant, but going up and down. Even the IPCC is of the opinion that the sun has increased in intensity over the last 150 years.
2007-12-15 08:52:19
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answer #6
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answered by Ben O 6
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You can't trust "opinions" on Yahoo answers. You have to have verified facts. The three answers below mine are excellent examples.
Take the Sun. Solar radiation on Earth (which is not quite the same as the Sun itself) has ben scientifically proven to be going down, for some time. Proof:
"Recent oppositely directed trends in solar
climate forcings and the global mean surface
air temperature", Lockwood and Frolich (2007), Proc. R. Soc. A
doi:10.1098/rspa.2007.1880
http://www.pubs.royalsoc.ac.uk/media/proceedings_a/rspa20071880.pdf
News article at:
http://news.bbc.co.uk/1/hi/uk/6290228.stm
CRAZYCONSERVATIVE - "Anyone hear about sea rise because of glacier melting? This claim has been repeated so many times that people believe it to be true. but even the IPCC does not contend this will happen. what they say are sea levels will rise because of the expansion of water due to heating effects. But, they do nothing to dispell this myth."
Actually scientists say (and can prove) that it is about 50-50. LAND_BASED ice melting and thermal expansion. Truth.
2007-12-15 08:13:48
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answer #7
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answered by Bob 7
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The sun is the same, people are contributing to global warming.
Scientists are not hiding the true, Bush and his associates are hiding the true.
2007-12-15 08:05:20
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answer #8
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answered by Anonymous
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it is improbable that human pastime does not have some result even though it remains to be shown how plenty and the quantity to which it is discernible from background version. some scientists say it is significant although i'm not powerfuble to choose. climate and the climate that impression it is in basic terms too complicated for us to have an entire information of all the climate in contact and their inter-relationships. Our fashions are, at ultimate, an approximation. using modelling isn't new and we use it frequently to administration our economic equipment, plan foodstuff production and so forth. the difference is that a small errors in those has a speedy comments time and can be corrected in the previous the end result turns into too super. A small errors in a climate kind can bring about over careful predictions or, much extra dangerously, over constructive predictions yet without the fast comments circumstances to allow corrective action in the previous a disaster. That by myself is a good adequate reason for warning although not panic. some human beings recommend the opinion of scientists is pushed through very own economics extremely than data. What concerns me is a number of the comparable human beings then bypass directly to assert they reject the assumption of climate substitute as a results of fact the economic result on them (jobs, ability expenditures, economic improve) could be too super. isn't that one in all those economic argument they're employing against the scientists to discredit them? we are all pushed through economics to a pair volume. If climate substitute predictions are even in part suitable, then we would be pushed through them much extra. no count if it is okay to consume and pollute, then why not carry the entire international as much as the intake and pollution point in line with individual as .... say .... the rustic. that must be ok does not it? I mean, if it is fantastic for usa, it must be ok for China and India and Africa and Europe and Oceania ... suitable? or possibly, that must be fantastically damned stupid as a results of fact all of us comprehend that there is a clever risk that human pastime has some result on the ambience. no person right it truly is in possession of the completed data. What we've are partial truths and protective self-pastime. concern makes issues unwelcome, not incorrect. forward making plans makes them attainable then, if it would not take place, we've been given off gently and could locate our economic conservatism interior the fast term interprets to economic rewards interior the long term.
2016-12-11 05:46:01
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answer #9
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answered by Anonymous
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Once again I like Bob have to cut and paste. Currently, the earth orbit around the sun is elliptical. The two farther are the winter, south of the equator and winter north of the equator. The two farther ends of the elliptical are collapsing inward. The two that would be equivalent of fall and spring are expanding slightly. The orbit is becoming more circular than elliptical hence there will be a global warming. Very easily proven by triangulation over the past 100 years.
2007-12-15 09:28:39
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answer #10
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answered by Pumpkin 4
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