What is a manmade phenomenon on Global Warming and how does it have an effect on Global Warming?
110854
Despite poular hysteria, I believe that mankind has a negligible effect on global temperatures, it is a natural phenomenon - a single volcanic eruption can put out more "greenhouse gases" than all of mankind combined. Earth's temperature has fluctuated from the beginning of it's existence. For proof of this, think back to the ice ages - there were no motor cars or large industry back then, but there were obviously abnormally large fluctuations in the planet's temperature bringing about the beginning and end of these ages.\n\nRemember, scientists are paid large amounts of money to come up with theories, if they stop coming up with theories, they are out of a job, and theories are just that - ie: not proven fact.
1169481
As partisan and insulting a statement (not even question) as that is, there are a few aspects to be addressed when discussing global warming.\n\nGlobal warming is the term used to describe how the average temperature of the planet is going up.  No one denies that the temperature is, in fact, going up.  Therefore, no one denies that global warming is a fact.\n\nHowever, according to studies of Antarctic ice, the average temperature of the planet has been rising for 6,000 years, which is well before the Industrial Revolution of 150 years ago.  This proves that global warming is not caused by man.  In that time, however, the rate of temperature rise has increased, which means that the actions of humanity probably has worsened the situation.\n\nThe critical facts about global warming are these:\n\nWhat are the effects of global warming going to be, and how can we prepare for them?  Currently, no model of global atmospheric projection has shown itself to accurately predict to any degree the general weather patterns of the Earth (such as the number and ferocity of hurricanes).  Until we come up with an accurate way of predicting the effects of global warming, preparing for them will be difficult and based upon conjectures, which are a difficult sell to taxpayers.\n\nWhat can be done to limit the effect of humanity on global warming in the future WITHOUT putting a major damper on economic growth and development, especially in developing nations?  For example, all nations could agree to stop driving vehicles that use internal combustion engines, but to do so at once would devastate the economies of many nations.  However, other options, such as diverting tax funds to subsidize the development of alternative-energy propulsion for vehicles, would accelerate the advent of such earth-friendly technology.\n\nAll in all, because of the massive stakes involved when discussing global warming (and the subsequent misinformation flying around about it), many people are confused as to the facts about it.  I was hoping to be as informative and unbiased as possible.\n\nPlease let me know what you think!
127042
1. continental drifting\n\nVery slow but substantial changes.\n\n2. changes in sun's energy\n\nSuspected to be large, but not yet demonstrated conclusively.\n\n3. variations in the positions of the earth relative to the sun\n\nFairly small effect. \n\n4. volcaic eruptions\n\nLarge observable effects in global temperature etc. \n\n5.greenhouse effect\n\nKeeps the earth about 60 degrees F warmer than it would be otherwise.\n\n6. global warming\n\nIn the last hundred years, the earth has warmed measurably. It is not clear if this is due to human activities or not, but many suspect it is.\n\n7. air pollution\n\nHas increased the ozone depletion at the poles in springtime, which introduces more UV lower into the air column. This might be changing the climate, although it is not known for sure.\n\nAlso blocks sunlight locally near sources of soot. It is not clear how big an effect this has globally, but it might be a cooling factor. \n\nAcid rain produced by S02 emissions has been involved in some deforestation, which has probably had an effect on the climate, but again this is not known for sure.
1054449
Global Warming is the increase in temperatures in our climate within our atmosphere. It is caused by liberal politicians and environmental wackos from the US and other western countries yakking, crying and complaining about how our modern way of life ( i.e. anything from industrial, technological and day to day conveniences ) is polluting and destroying the planet. The toxic gasses produced by all their whining and complaining is filling up our atmosphere with warm unfilthy air. The result is a "greenhouse" effect. All that hot, vile and unhealthy  gasses coming out of their mouth is a danger to us all. As a sidebar, I have to note that the environmental wackos and the liberal politicians have different agendas as to why they are crying and complaining, but that is another topic all together. \n\nSo in short, Global Warming is caused by hot air coming out environmentalist and left-wing politicians mouths when whining and complaining about anything. Solution: shut them up. \n\nWhat effect does it have in a million years: it will stump human and humanities growth
514782
Anthropogenic impact means human impact. Even without human interference, the earth goes through natural warming and cooling cycles. Most recently there was an ice age (with glaciers that melted to form the great lakes), and that's why the earth is warming now. "Global warming," though significantly sped up by humans, is a natural process that's been happening since life first began on this planet.
260304
global warming is cause by greenhouse gases being trapped near earths atmosphere, which causes heat to be trapped nearer to earths surface which increases the temperature on earth slightly which melts the polar ice caps which makes water levels rise which means islands will be flooded and shores will advance into the land making living space smaller in an already overpopulated world.
251910
An increase in solar radiation due to slight variations in the Earth's orbit and orbital tilt.  These are regular variations and also coincide with greater and lesser ice ages depending on slight variations in solar output.  \n\nWhile "global warming" is an issue for sudden climate change, it probably had little influence on the most recent ice age.\n\nIn fact there have been many "mini" ice ages in recorded history, most notably around 1300 AD where really extreme cold conditions led to some very interesting technological developments such as the chimney.\n\nSee the link below.
724297
Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.\n\nThe Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century [1]. The prevailing scientific opinion on climate change is that "most of the warming observed over the last 50 years is attributable to human activities"[2].\n\nThe increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs) are the primary causes of the human-induced component of warming[3]. They are released by the burning of fossil fuels, land clearing and agriculture, etc. and lead to an increase in the greenhouse effect. The first speculation that a greenhouse effect might occur was by the Swedish chemist Svante Arrhenius in 1897, although it did not become a topic of popular debate until some 90 years later. [4]\n\nClimate sensitivity is a measure of the equilibrium response to increased GHGs, and other anthropogenic and natural climate forcings. It is found by observational [5] and model studies. This sensitivity is usually expressed in terms of the temperature response expected from a doubling of CO2 in the atmosphere. The 2001 IPCC report estimates a likelyhood between 66% and 90% for a climate sensitivity in the range 1.5–4.5 °C (2.7–8.1 °F)[6]. This should not be confused with the expected temperature change by a given date, which also includes a dependence on the future GHG emissions and a delayed response due to thermal lag, principally from the oceans. Models referenced by the Intergovernmental Panel on Climate Change (IPCC), using a range of SRES scenarios, project that global temperatures will increase between 1.4 and 5.8 °C (2.5 to 10.5 °F) between 1990 and 2100.\n\nAn increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornados. Other consequences include higher or lower agricultural yields, glacial retreat, reduced summer stream flows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100, warming (and sea level rise due to thermal expansion) is expected to continue past then, since CO2 has an estimated atmospheric lifetime of 50 to 200 years. [7]. Only a small minority of climate scientists discount the role that humanity's actions have played in recent warming. However, the uncertainty is more significant regarding how much climate change should be expected in the future, and there is a hotly contested political and public debate over implementation of policies that deal with predicted consequences, what, if anything, should be done to reduce or reverse future warming, and how to deal with the predicted consequences.\n\nYou could get more information from the link below...
452166
The increase of the greenhouse gases --> Carbon Dioxide, CFCs, Methane! Nitrogen oxiode.\n\nGases such as carbon dioxide trap heat and since deforestion is occuring rapdily there is less trees to take in carbon dioxide so the amount of carbon dioxide increases. With the amount of carbon dioxide increased more heat is absorbed and it is stuck on the Earth. \n\nAlso another form of global warming is the depletion of the ozone layer. CFC's contains a chemical that destroys the Ozone layer and the Ozone layer is a protective shield of the Earth. It gets rid of the harmfull sun's ultraviolet rays and without the ozone layer the UV rays can freely enter the Earth.
457897
No.  If the planet were on a cooling trend, and stayed that way for a while, it might be heading towards a periodic Ice Age, as it has done in the past.  We would consume a lot more of outr limited energy resources just to keep ourselves warm.  Also, don't worry so much about Global Warming.  As I said before, nature goes through these cycles of warming and cooling.  Yes. humans have an impact, but it is small.
537127
Greenhouse effect:  \nIn our atmosphere, we have something called greenhouse gasses.  They exist naturally, and two examples of greenhouse gasses are water vapour and carbon dioxide (there are several more of them).  The greenhouse gasses cause some of the heat that is emitted from the earth to stay within our atmosphere.  If there were no greenhouse gasses in the atmosphere, all the heat from the earth would radiate out into space.  This would mean that the average temperature of earth would be -18 degrees Celsius (0 degrees Farenheit) instead of +15 deg C (60 deg F).  That's a huge difference - I doubt that there would be human life on the planet earth without the greenhouse effect!\n\nGlobal warming:  \nWhen people talk about global warming, they mean that the amount of greenhouse gasses in the atmosphere increases.  Some people say that changes occur naturally, some people say it's because we pollute the air with carbon dioxide etc.  An increase of greenhouse gasses in the atmosphere would mean that less of the heat from the earth would radiate into space, which gives an increase in the average temperature on earth.  Rising temperatures could mean, for instance, that some of the polar ice melts, causing flooding in coastal countries.\n\nSo:\nGreenhouse effect - a good thing\nGlobal warming - possibly bad
434252
one theory of alternating weather condition like the global warming and ice age is the Milankovitch theory. He explained there (Milankovitch) that alternaing global warming and ice age are natural event due to eccenticity, obliquity and precession of the earth.\nHuman just hasten the global warming due to excess CO2 from burning materials extracted and made by man.
305628
many different factors, one being us. Humans speed the natural process of global warming, just like an ice age, the earth every few million years goes through a process of warming, but greenhouse gases and other things that humans do have been speeding up the process. However, we are not the ones that cause it, since it's a natural cycle, so basically this was bound to happen. This has nothing to do with the end of the world or anything crazy like that. Some theories suggest that this will bring another ice age (a lot of water evaporates and creates a thick layer of clouds, preventing the sun from reaching the surface...the temperature gets colder and an ice age occurs. We will probably not live to see these events since they happen over a Long period of time.
157711
It is Global Warming.  Geologically speaking we are still coming out of the last ice age.  We are on in a natural cycle which has been accerated by pollution.
37393
No one really knows if the apparent warming we are observing is natural, a secular increase due to various natural processes. It could be due to changes in the solar constant, it could be because of complicated nonlinear effects we do not understand, it could be that we are in an interglacial period in the Milankovitch cycle, etc. \n\nHowever, it also could be anthropogenic in origin. Evidence is mounting that it might be, but it is not yet certain.
24166
Global warming\nFrom Wikipedia, the free encyclopedia that anyone can edit\nJump to: navigation, search\n \nGlobal mean surface temperatures 1856 to 2004 \nMean temperature anomalies during the period 1995 to 2004 with respect to the average temperatures from 1940 to 1980Global warming is an increase in the average temperature of the Earth's atmosphere and oceans. The term is also used for the more specific scientific theory of anthropogenic global warming, which states that much of the recent observed (and projected) global warming is human-induced and the result of a strengthened greenhouse effect caused by man-made increases in carbon dioxide (through the burning of fossil fuels and deforestation) and other greenhouse gases. The natural greenhouse effect keeps the Earth 30 °C warmer than it otherwise would be; adding carbon dioxide to an atmosphere, with no other changes, will make a planet's surface warmer. Current research tries to uncover more details, e.g. about positive and negative feedback mechanisms, to allow a more precise quantification of the effects of global warming.\n\nTemperature change is just one aspect of the broader subject of (human-induced) climate change. The scientific opinion on climate change, as expressed by the UN Intergovernmental Panel on Climate Change (IPCC) and explicitly endorsed by the national science academies of the G8 nations, is that the average global temperature has risen 0.6 ± 0.2 °C since the late 19th century, and that "most of the warming observed over the last 50 years is attributable to human activities". A small minority of qualified scientists contest the view that humanity's actions have played a significant role in increasing recent temperatures. Uncertainties do exist regarding how much climate change should be expected in the future, and a hotly contested political and public debate exists over what actions, if any, should be taken in light of global warming.\n\nBased on basic science, observational sensitivity studies, and the climate models referenced by the IPCC, temperatures may increase by 1.4 to 5.8 °C between 1990 and 2100 [1]. This is expected to result in other climate changes including rises in sea level and changes in the amount and pattern of precipitation. Such changes may increase extreme weather events such as floods, droughts, heat waves, and hurricanes, change agricultural yields, or contribute to biological extinctions. Although warming is expected to affect the frequency and magnitude of these events, it is very difficult to connect any particular event to global warming.
1162504
Global warming is a term used to refer to the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.\n\nThe Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 degrees Celsius (1.1 ± 0.4  degrees Fahrenheit) in the 20th century. The prevailing scientific opinion on climate change is that "most of the warming observed over the last 50 years is attributable to human activities" [1]. The increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs) are the primary causes of the human-induced component of warming. They are released by the burning of fossil fuels, land clearing and agriculture, etc.\n\nThe measure of the climate response to increased GHGs, climate sensitivity, is found by observational studies and climate models. Doubling of CO2 in the atmosphere warms in the range 1.5-4.5  degrees C (2.7-8.1  degrees F). Models referenced by the Intergovernmental Panel on Climate Change (IPCC) predict that global temperatures may increase by between 1.4 and 5.8  degrees C (2.5 to 10.5  degrees F) between 1990 and 2100. The uncertainty in this range results from both the difficulty of predicting the volume of future greenhouse gas emissions and uncertainty about climate sensitivity.\n\nAn increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornados. Other consequences include higher or lower agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100, warming (and sea level rise due to thermal expansion) is expected to continue past then, since CO2 has a long average atmospheric lifetime. [2].\n\nOnly a small minority of scientists contest the view that humanity's actions have played a significant role in increasing recent temperatures. However, the uncertainty is more significant regarding how much climate change should be expected in the future, and there is a hotly contested political and public debate over what, if anything, should be done to reduce or reverse future warming, and how to cope with the consequences.\n\nThe term 'global warming' is a specific case of the more general term 'climate change' (which can also refer to cooling, such as occurs during ice ages). In principle, 'global warming' is neutral as to the causes, but in common usage, 'global warming' generally implies a human influence. However, the UNFCCC uses 'climate change' for human-caused change, and 'climate variability' for other changes [3]. Some organizations use the term 'anthropogenic climate change' for human-induced changes. Geological activity will not be affected except as above.