PDA

View Full Version : How Global Warming Works



_knownothing_
07-28-2010, 04:05 PM
http://www.dilsedesi.org/forums/uploads/monthly_04_2009/post-3783-1241133201.jpg


How Global Warming Works

Global warming is the increase in the average temperature of the Earth’s near-surface air and oceans since the mid-twentieth century and its projected continuation.

The global average air temperature near the Earth’s surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the hundred years ending in 2005. The Intergovernmental Panel on Climate Change (IPCC) concludes “most of the observed increase in globally averaged temperatures since the mid-twentieth century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations” via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward. These basic conclusions have been endorsed by at least thirty scientific societies and academies of science,including all of the national academies of science of the major industrialized countries. While individual scientists have voiced disagreement with some findings of the IPCC,the overwhelming majority of scientists working on climate change agree with the IPCC’s main conclusions.



Climate model projections summarized by the IPCC indicate that average global surface temperature will likely rise a further 1.1 to 6.4 °C (2.0 to 11.5 °F) during the twenty-first century.The range of values results from the use of differing scenarios of future greenhouse gas emissions as well as models with differing climate sensitivity. Although most studies focus on the period up to 2100, warming and sea level rise are expected to continue for more than a thousand years even if greenhouse gas levels are stabilized. The delay in reaching equilibrium is a result of the large heat capacity of the oceans.

World Environment Day Theme is Global Warming



POINT OF NO RETURN?

Twenty years ago, the scientist James Lovelock work out that the earth possessed a planetery-scale control system which kept the environment fit for life. He called it GAIA… and the theory has become widly accepted.

Now, he believes mankind’s abuse of the environment is making that mechanism work against us.His astonishing conclusion that climate change is already insoluble, and life on earth will never be the same.” By Michael Mc Carthy, Environment Editor, the independent U.K. pulished 16,January 2006.

Other reknowned climate scientists still have some hope… but they say we have less than ten years before the damage is irreversible.

Global Warming caused principally by the largescale Emissions of industrial gases such as carbon dioxide (CO2) is almost certainly the greatest threat that mankind has ever faced,because its put a question marked over the very habitability of the Earth.This is the inconvenient truth.

However, Sen.Inhofe - Chairman of the Senate Environment and Public Works Committee, believes; and strongly asserts that “Global Warming is a HOAX”.The Georges W. Bush administration has been accused of editing official scientific studies to downplay the impact of Global Warming and asking Top Climate Scientist at NASA to refrain from speaking out on the phenomenon.

We are already seen change.Glaciers are melting,plants and animals are been forcing from their habitat, and the number of severe storms and droughts is increasing.

The numbers of category 4 and 5, hurricanes has almost doubled in the last 30 years.

Malaria has spread to higher altitudes in place like colombian Andes, 7,000 feet above the see level.Reported cases of Malaria. The flow of ice from glaciers in Greenland has more than doubled over the past decade.
If the Warming continues, we can except catastrophic consequences.Deaths from Global Warming will double in just 25 years - To 300,000 poeple a year.

In egypyt 1 m (3.3 ft.)of sea level-rise is observed in Meditteranean sea. The Surface Air Temperature increase 1960-2060. Global sea levels could rise by more than 20 feet with the loss of shelf ice in Greenland and Antarctica, devastating, coastal areas worldwide.