See Video from an Expedition: http://video.nationalgeographic.com/video/player/environment/global-warming-environment/antarctica-ice.html
http://www3.nationalgeographic.com/places/videos/video_antarctica_antarctica.html
Information:
Fingerprints of global warming are indicators of the global, long-term warming trend observed in the historical record. They include heat waves, sea-level rise, melting glaciers and warming of the poles.
Harbingers are events that foreshadow the impacts likely to become more frequent and widespread with continued warming. They include spreading disease, earlier spring arrival, plant and animal range shifts, coral reef bleaching, downpours, and droughts and fires.
They has been coastal flooding and sea levels has raised. The sea level has risen 10 to 25 cm in the last 100 years. In the next 100 years the sea level is suppose to rise 49 cm.
Also temperatures have increased about 0.3 to 0.6°C during the last 150 years (Nicholls et al., 1996). Since 1975, the increase of the 5-year mean temperature is about 0.5°C - a rate that is faster than for any previous period of equal length in the instrumental record (NASA, 1999).
Glaciers have melted, Since 1850 the glaciers of the European Alps have lost about 30 to 40% of their surface area and about half of their volume. Similarly, glaciers in the New Zealand Southern Alps have lost 25% of their area over the last 100 years
Information Against Global Warming:
Against Global Warming:
1. 1940-1970 scientist believed that there would be a “global cooling” meaning another ice age.
2. Global cooling is just as threatening as global warming
3. Global Warming, as we think we know it, doesn't exist.
4. We are wasting time, energy and trillions of dollars while creating unnecessary fear and consternation over an issue with no scientific justification
5. It was then theorized that since humans were producing more CO2 than before, the temperature would inevitably rise. The theory was accepted before testing had started, and effectively became a law.
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Worldwide, temperatures were also in record territory. The global surface temperature for 2007 is on pace to be the fifth warmest since those records were first started in 1880, the report said.
"Within the last 30 years, the rate of warming is about three times greater than the rate of warming since 1900," said Jay Lawrimore, chief of the climate monitoring branch at the center. "The annual temperatures continue to be either near-record or at record levels year in and year out."
"Including 2007, seven of the eight warmest years on record have occurred since 2001 and the 10 warmest years have all occurred since 1997," it added. "The global average surface temperature has risen between 0.6°C and 0.7°C since the start of the twentieth century, and the rate of increase since 1976 has been approximately three times faster than the century-scale trend."
In the United States, a vast swath was warmer than usual this year, leading to severe drought conditions and wildfires in the West and Southeast. Texas, the Lone Star state, stood alone, the only one to record below average temperatures.
The months of March and August were the second warmest in more than 100 years. Six states — Kentucky, Tennessee, South Carolina, Georgia, Alabama and Florida — had the warmest August month on record.
In 113 years of record keeping, all but four states — Texas, Maine, New Hampshire and Vermont — experienced either above average or significantly above average temperatures from January through November. Wyoming had its second warmest year; Idaho and Utah had the fourth warmest years on record.
North Carolina had the driest year so far. From midsummer into December, more than three-quarters of the Southeast was in drought, the report said.
The issue in Texas, Lawrimore said, was too much rain that led to flooding and the wettest summer on record. The cloudy and rainy weather for much of the year contributed to the cooler temperatures for the state, he said.
The past year was particularly rough in the Southeast and West, which experienced serious drought conditions. More than three-quarters of the Southeast was in drought from midsummer into December, the report said.
The National Oceanic and Atmosphere Administration will update its data in early January to reflect the last few weeks of December.
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