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Global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.3 ± 0.32 °F) during the past century. The Intergovernmental Panel on Climate Change (IPCC) concludes, "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations," which leads to warming of the surface and lower atmosphere by increasing the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes have probably had a small warming effect from pre-industrial times to 1950, but a small cooling effect since 1950. These basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries. The American Association of Petroleum Geologists is the only scientific society that rejects these conclusions. A few individual scientists disagree with some of these conclusions as well.
Source.
Scientists agree the Earth's climate is being directly affected by human activity, and for many people around the world, these changes are having negative effects. Records show that 11 of the last 12 years were among the 12 warmest on record worldwide.
The just-released Intergovernmental Panel on Climate Change (IPCC) Summary for Policy Makers — the first volume of the IPCC's 4th Assessment Report — states that scientists are more than 90% confident that human industrial activity is driving global temperature rises.
Carbon dioxide levels today are nearly 30 percent higher than they were prior to the start of the Industrial Revolution, based on records extending back 650,000 years.
According to NASA, the polar ice cap is now melting at the rate of 9 percent per decade. Arctic ice thickness has decreased 40 percent since the 1960s.
Source.
Examples of observed climatic changes
Increase in global average surface temperature of about 1°F in the 20th century
Decrease of snow cover and sea ice extent and the retreat of mountain glaciers in the latter half of the 20th century
Rise in global average sea level and the increase in ocean water temperatures
Likely increase in average precipitation over the middle and high latitudes of the Northern Hemisphere, and over tropical land areas
Increase in the frequency of extreme precipitation events in some regions of the world
Examples of observed physical and ecological changes
Thawing of permafrost
Lengthening of the growing season in middle and high latitudes
Poleward and upward shift of plant and animal ranges
Decline of some plant and animal species
Earlier flowering of trees
Earlier emergence of insects
Earlier egg-laying in birds
Source.
Originally posted by Boatphone
The Earth is not fraglie! Is this a why for the creators of ATS to influence our thinking on, so called, "global warming"?
-- Boat
[edit on 1-7-2007 by Boatphone]
[edit on 1-7-2007 by Boatphone]
Originally posted by Boatphone
Global Warming is a hoax! ATS aiding?
Okay,
Al Gore and other eco-fear-mongers are using groupthink to fool the population into going along with their hurtful policy.
Originally posted by Boatphone
Also, why is this forum called "fraglie Earth"? The Earth is not fraglie!
Originally posted by shrunkensimonThe climate is changing on all other planets in our solar system..
The Sun reaches its Solar Maximum in 2012..
Various indigineous peoples have predicted the "end of time" as 2012.