explain the cause of global warming?

Answer 1

The climate system varies both through natural, "internal" processes as well as in response to variations in external "forcing" from both human and non-human causes, including solar activity, volcanic emissions, and greenhouse gases. Climatologists agree that the earth has warmed recently. The detailed causes of this change remain an active field of research, but the scientific consensus identifies greenhouse gases as the primary cause of the recent warming. Outside of the scientific community, however, this conclusion can be controversial.

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, and the Earth uninhabitable. It is therefore not correct to say that there is a debate between those who "believe in" and "oppose" the theory that adding carbon dioxide or methane to the Earth's atmosphere will, absent any mitigating actions or effects, result in warmer surface temperatures on Earth. Rather, the debate is about what the net effect of the addition of carbon dioxide and methane will be, when allowing for compounding or mitigating factors.

One example of an important feedback process is ice-albedo feedback. 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 less reflective than ice, and so absorb more solar radiation. This causes more warming, which in turn causes more melting, and the 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 perhaps 0.5 °C to 1.0 °C (0.9–1.8 °F) would still occur.

Answer 2

probably the cause of global warming would be the high emissions of carbon dioxide into the atmosphere. The carbon dioxide causes a wall around the outside of the atmosphere. That wall traps the suns uv rays, causing the earth to become hotter. Most countries in the world have to burn coal for electricity, and when burning coal it releases carbon dioxide into the atmosphere. We need to think of alternative power sources that are good for the environment, such as nuclear power plants.

Because of global warming our earth's temperature is slowly rising. in a couple of years these changes could be permanent. Because of global warming, at the north and south poles, the icebergs are melting rapidly, causing sea levels to rise. If these sea levels rise, some places in the world like fiji, vanuatu, and some other islands may disappear completely because of the high water levels.

Answer 3

2 Causes.

GreenHouse Effect:

The greenhouse gases help us from the ultraviolet rays exposing to us. The greenhouse gases should not be too much or less. One of the greenhouse gases are C02 (carbon dioxide). Now from 1700s the use of C02 (carbon dioxide has increased 30%. So the greenhouse gases are increasing. Even though there is much, the ultraviolet ways sstill can penetrate the blanket of greenhouse gases. But the heat cannot escape, because of the amount of greenhouse gases.

2. Ozone Layer

The Ozone Layer protect the ultraviolet rays too, CFCs of chlolorflourocarbons become chlorines when they are near the ozone because the rays are mopre effective. When chlorines expose to the ozone layer they break down the molocules that make up the ozone layer. Scientists discovered a hole of the ozone layer over Antarctica and Arctic so that's effecting the Global Warming too.

Answer 4

Page 1
GLOBAL WARMING

Increase in the average temperature of the atmosphere, oceans, and landmasses of Earth. The planet has warmed (and cooled) many times during the 4.65 billion years of its history. At present Earth appears to be facing a rapid warming, which most scientists believe results, at least in part, from human activities. The chief cause of this warming is thought to be the burning of fossil fuels, such as coal, oil, and natural gas, which releases into the atmosphere carbon dioxide and other substances known as greenhouse gases and the deforestation. As the atmosphere becomes richer in these gases, it becomes a better insulator, retaining more of the heat provided to the planet by the Sun.

The average surface temperature of Earth is about 15°C (59°F). Over the last century, this average has risen by about 0.6 Celsius degrees (1 Fahrenheit degree). Scientists predict further warming of 1.4 to 5.8 Celsius degrees (2.5 to 10.4 Fahrenheit degrees) by the year 2100. This temperature rise is expected to melt polar ice caps and glaciers as well as warm the oceans, all of which will expand ocean volume and raise sea level by an estimated 9 to 100 cm (4 to 40 in), flooding some coastal regions and even entire islands. Some regions in warmer climates will receive more rainfall than before, but soils will dry out faster between storms. This soil desiccation may damage food crops, disrupting food supplies in some parts of the world. Plant and animal species will shift their ranges toward the poles or to higher elevations seeking cooler temperatures and species that cannot do so may become extinct. The potential consequences of global warming are so great that many of the world's leading scientists have called for international cooperation and immediate action to counteract the problem.

MEASURING


In the early 1986, scientists suggested that burning fossil fuels might change the composition of the atmosphere but he can’t prove it during that time.
But in 1957, they were able to confirm their hypothesis, how? They started a program called International Geophysical Year; they set some instrument on top of the Hawaiian Volcano the Mauna Loa. Their instruments indicated that CO2 was rising.
After that experiment they continue to track the condition of the atmosphere using the Geostationary Operational Environmental Satellite (GOES) Weather Satellite

The 3 hottest years occurred after 1990
And 1998 is the warmest year of all


WEATHER EFFECT

1.Weather – the northern hemisphere will heat up more.
a.Regions that experienced light snow fall may receive no snow at all
b.El Nino phenomenon
c.Increase in production of cloud that will slow down the warming process
d.More rainfall because of the greater humidity
e.Melting of ice in Polar regions that may cause;

2.Increase in Sea Level - low coastal areas will be submerged in water.

3. Agriculture – low food production

3.Animals & Plants –
a.migration in polar regions
b.lacking of space for animals and plants
c.for those who cannot migrate, EXTINCTION may occur

4.Human Health
a.increase of poisonous insects such as mosquitoes. Today we can only see mosquitoes in equatorial regions because Polar Regions are too cold for them to live.






Page 3
CONTROL GLOBAL WARMING

1.Carbon Sequestration –

A.Reforestation

2.Alternative Source of Energy

A.Solar Power – solar panels
B.Wind Power – wind mill, wind turbine
C.Hydrogen Fuel Cells – device that is used in some automobile that needs only hydrogen and oxygen to run an engine of a car, how it can reduce CO2? It only secretes water.

Answer 5

Global Warming is the result of chronic & cyclic changes in the environment of the Earth ....which have been going on since millions of years..
Green house gases like CO, CO2 , methane ..etc contribute a little in trapping the heat rays.

Answer 6

Earth receives continuously solar energy in all spectrum range. Part of this energy is reflected back to outer space, the other part of the energy is stored into earth in various forms (trees, combustibles, animals and human being, etc..).
Now according to physics laws (thermodynamics) the energy you add to a material increases its temperature.
All the rest is details only.