Can anyone tell me the definition of Global Warming?

Answer 1

Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades

Answer 2

Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.

The 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].

The 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]

Climate 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.

An 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.

You could get more information the link below...

Answer 3

Climate Change or Global Warming?
The term climate change is often used interchangeably with the term global warming, but according to the National Academy of Sciences, "the phrase 'climate change' is growing in preferred use to 'global warming' because it helps convey that there are [other] changes in addition to rising temperatures."

Climate change refers to any significant change in measures of climate (such as temperature, precipitation, or wind) lasting for an extended period (decades or longer). Climate change may result from:

natural factors, such as changes in the sun's intensity or slow changes in the Earth's orbit around the sun;
natural processes within the climate system (e.g. changes in ocean circulation);
human activities that change the atmosphere's composition (e.g. through burning fossil fuels) and the land surface (e.g. deforestation, reforestation, urbanization, desertification, etc.)
Global warming is an average increase in the temperature of the atmosphere near the Earth's surface and in the troposphere1, which can contribute to changes in global climate patterns. Global warming can occur from a variety of causes, both natural and human induced. In common usage, "global warming" often refers to the warming that can occur as a result of increased emissions of greenhouse gases from human activities.

Answer 4

A gross deception and fraud invented by liberals in an attempt to manipulate western governments into not developing needed industry. Completely ignores who pollutes, how, and why, and who actually works to protect the environment.

Has no basis in observable fact whatsoever. All experts who say different are from outside the correct field to comment on this. All experts qualified to comment are united in saying this doesn't happen. And for good reason. This is a measured phenomena. You can look at data and clearly see it is not happening. And not all the phony computer models can change that fact.

Answer 5

Global warming is when heat tries to escape throught the atmosphere but is blocked by gasses. Trapping heat causing the world's tempature to increase.

Answer 6

is wen the sun is melting da ice in da north and da south polz