what do u mean by global warming?

Answer 1

The term global warming is a specific example of the broader term climate change, which can also refer to global cooling. In principle, global warming is neutral as to the period or causes, but in common usage the term generally refers to recent warming and implies a human influence.[3] The UNFCCC uses the term "climate change" for human-caused change, and "climate variability" for other changes.[4] Some organizations use the term "anthropogenic climate change" for human-induced changes.



The climate system varies through natural, internal processes and in response to variations in external "forcing" from both human and natural causes. These forcing factors include solar activity, volcanic emissions, variations in the earth's orbit (orbital forcing) and greenhouse gases. The detailed causes of the recent warming remain an active field of research, but the scientific consensus identifies greenhouse gases as the main influence. The major natural greenhouse gases are water vapor, carbon dioxide, methane, and ozone.

Adding carbon dioxide (CO2) or methane (CH4) to Earth's atmosphere, with no other changes, will make the planet's surface warmer. Greenhouse gases create a natural greenhouse effect without which temperatures on Earth would be an estimated 30 °C (54 °F) lower, so that Earth would be uninhabitable. It is therefore not correct to say that there is a debate between those who "believe in" and "oppose" the greenhouse effect as such. Rather, the debate concerns the net effect of the addition of greenhouse gases when allowing for compounding or mitigating factors.

One example of an important feedback process is ice-albedo feedback.[8] The increased CO2 in the atmosphere warms the Earth's surface and leads to melting of ice near the poles. As the ice melts, land or open water takes its place. Both land and open water are on average less reflective than ice, and thus absorb more solar radiation. This causes more warming, which in turn causes more melting, and this cycle continues.

Due to the thermal inertia of the Earth's oceans and slow responses of other indirect effects, the Earth's current climate is not in equilibrium with the forcing imposed by increased greenhouse gases. Climate commitment studies indicate that, even if greenhouse gases were stabilized at present day levels, a further warming of about 0.5 °C (0.9 °F) would still occur.[9]

Answer 2

<> For starters, a fashion which exhibits a 'stable decline' over the subsequent ninety years does not advise that therefor occasional annual spikes are out of the question. extra importantly, are you confident you're watching the dazzling graphs? Are you confident you already know the uncertainties-selection expressed on each and each graph? This years' checklist Antarctic sea ice quantity falls properly in the uncertainties selection of the IPCC's 2007 fashions as expressed in determine 10.13 D.

Answer 3

The scientific meaning is that the 'average' temperature of the Earth has been increasing for several decades.

The current, 'politically correct' meaning (as espoused by Al ('I invented the Internet') Gore and his sycophants) is that it's being caused by our pollutioin of the environment.

In fact, it may well be a natural phenomena since there is plenty of geological evidence to prove that the Earth has, in times past, been quite a bit warmer (and colder) than it is now.

HTH ☺


Doug

Answer 4

when the percentage of gases like carbondioxide and methane increases in the atmosphere then they absorb the heat coming from sun or ultravoilat rays and prevent them to escape from the surface of the earth.Thus increase in such gases also increase the the heat which is known as global warming.

Answer 5

the earth is changing temperatures and so the earth is warming. winters are not so cold anymore and summers seem to get...well..hotter.

Answer 6

looks like ole Jason and his wikipedia done it again....but hell, i live on the west coast, it seems that every time i let out a tear-*** fart, it follows the wind toward east and really snows

Answer 7

Imaginativly said - spring arrives,but summer is already there-
where her to go?

Answer 8

There is something called "newspapers" that you might open sometime.