Biggest heat spike in history

An analysis by a top government scientist says the extreme heat and drought seen in the U.S., Europe and other regions in recent years must be global warming. A new study looking at 11,000 years of climate temperatures shows the

world in the middle of a dramatic U-turn, lurching from near-record

cooling to a heat spike.




FILE - In this Aug. 29, 1938 file photo, smoke rises from smokestacks at Skoda’s main foundry in Pilsen, Czechoslovakia. A new study looking at 11,000 years of climate temperatures shows the world in the middle of a dramatic U-turn, lurching from near-record cooling to a heat spike. It shows how the globe for several thousands of years was cooling until an unprecedented reversal in the 20th century, which scientists say is further evidence that global warming isn’t natural but man-made since the start of the Industrial Revolution. The research was released Thursday, March 7, 2013 in the journal Science. (AP Photo)
FILE - In this Aug. 29, 1938 file photo, smoke rises from smokestacks at Skoda’s main foundry in Pilsen, Czechoslovakia. A new study looking at 11,000 years of climate temperatures shows the world in the middle of a dramatic U-turn, lurching from near-record cooling to a heat spike. It shows how the globe for several thousands of years was cooling until an unprecedented reversal in the 20th century, which scientists say is further evidence that global warming isn’t natural but man-made since the start of the Industrial Revolution. The research was released Thursday, March 7, 2013 in the journal Science. (AP Photo)
FILE - In this Aug. 29, 1938 file photo, smoke rises from smokestacks at Skoda’s main foundry in Pilsen, Czechoslovakia. A new study looking at 11,000 years of climate temperatures shows the world in the middle of a dramatic U-turn, lurching from near-record cooling to a heat spike. It shows how the globe for several thousands of years was cooling until an unprecedented reversal in the 20th century, which scientists say is further evidence that global warming isn’t natural but man-made since the start of the Industrial Revolution. The research was released Thursday, March 7, 2013 in the journal Science. (AP Photo)
Walden Pond has seen warmer temperatures and earlier spring flowerings since Henry David Thoreau first stayed there in 1852.
Global Warming Brings Earlier Spring Flowers
Walden Pond has seen warmer temperatures and earlier spring flowerings since Henry David Thoreau first stayed there in 1852.
This undated file photo from the Colorado State Forest Service shows pine trees killed by beetles near Grandby, Colo. The U.S. Department of Agriculture warns in a report released Tuesday that big changes are in store for the nation's forests as global warming increases wildfires and insect infestations, and generates more frequent floods and droughts. (AP Photo/Colorado State Forest Service, Jen Chase)
This undated file photo from the Colorado State Forest Service shows pine trees killed by beetles near Grandby, Colo. The U.S. Department of Agriculture warns in a report released Tuesday that big changes are in store for the nation's forests as global warming increases wildfires and insect infestations, and generates more frequent floods and droughts. (AP Photo/Colorado State Forest Service, Jen Chase)
This undated file photo from the Colorado State Forest Service shows pine trees killed by beetles near Grandby, Colo. The U.S. Department of Agriculture warns in a report released Tuesday that big changes are in store for the nation's forests as global warming increases wildfires and insect infestations, and generates more frequent floods and droughts. (AP Photo/Colorado State Forest Service, Jen Chase)
FILE - In this Sept. 30, 2011 file photo, Sailboats and a floating dock lie on the dry, cracked dirt in a harbor at Lake Hefner in Oklahoma City as drought continues to be a problem across the state. The relentless, weather-gone-crazy type of heat that has blistered the United States and other parts of the world in recent years is so rare and off-the-charts that it can't be anything but man-made global warming, a new statistical analysis from a top government scientist says.(AP Photo/Sue Ogrocki, File)
FILE - In this Sept. 30, 2011 file photo, Sailboats and a floating dock lie on the dry, cracked dirt in a harbor at Lake Hefner in Oklahoma City as drought continues to be a problem across the state. The relentless, weather-gone-crazy type of heat that has blistered the United States and other parts of the world in recent years is so rare and off-the-charts that it can't be anything but man-made global warming, a new statistical analysis from a top government scientist says.(AP Photo/Sue Ogrocki, File)
FILE - In this Sept. 30, 2011 file photo, Sailboats and a floating dock lie on the dry, cracked dirt in a harbor at Lake Hefner in Oklahoma City as drought continues to be a problem across the state. The relentless, weather-gone-crazy type of heat that has blistered the United States and other parts of the world in recent years is so rare and off-the-charts that it can't be anything but man-made global warming, a new statistical analysis from a top government scientist says.(AP Photo/Sue Ogrocki, File)
In this Thursday, Aug. 2 2012 photo, Dr. James E. Hansen head of the NASA Goddard Institute for Space Studies gestures during an interview with the Associated Press at his office in New York. (AP Photo/Mary Altaffer)
In this Thursday, Aug. 2 2012 photo, Dr. James E. Hansen head of the NASA Goddard Institute for Space Studies gestures during an interview with the Associated Press at his office in New York. (AP Photo/Mary Altaffer)
In this Thursday, Aug. 2 2012 photo, Dr. James E. Hansen head of the NASA Goddard Institute for Space Studies gestures during an interview with the Associated Press at his office in New York. (AP Photo/Mary Altaffer)
FILE - In this Aug. 19, 2003 file photo, the Ibardin lake, which provides drinking water to the southern French cities of Hendaye, Biriatu and Urrugne, is almost dry due to the recent heat wave, near the French-Spanish border. The relentless, weather-gone-crazy type of heat that has blistered the United States and other parts of the world in recent years is so rare and off-the-charts that it can't be anything but man-made global warming, a new statistical analysis from a top government scientist says. (AP Photo/Bob Edme, File)
FILE - In this Aug. 19, 2003 file photo, the Ibardin lake, which provides drinking water to the southern French cities of Hendaye, Biriatu and Urrugne, is almost dry due to the recent heat wave, near the French-Spanish border. The relentless, weather-gone-crazy type of heat that has blistered the United States and other parts of the world in recent years is so rare and off-the-charts that it can't be anything but man-made global warming, a new statistical analysis from a top government scientist says. (AP Photo/Bob Edme, File)
FILE - In this Aug. 19, 2003 file photo, the Ibardin lake, which provides drinking water to the southern French cities of Hendaye, Biriatu and Urrugne, is almost dry due to the recent heat wave, near the French-Spanish border. The relentless, weather-gone-crazy type of heat that has blistered the United States and other parts of the world in recent years is so rare and off-the-charts that it can't be anything but man-made global warming, a new statistical analysis from a top government scientist says. (AP Photo/Bob Edme, File)
Farmers battle conditions reminiscent of the 1930s Dust Bowl.
Drought Hurting Crops, Raising Cost of Food
Farmers battle conditions reminiscent of the 1930s Dust Bowl.
In this Thursday, Aug. 2 2012 photo, Dr. James E. Hansen head of the NASA Goddard Institute for Space Studies gestures during an interview with the Associated Press at his office in New York. (AP Photo/Mary Altaffer)
In this Thursday, Aug. 2 2012 photo, Dr. James E. Hansen head of the NASA Goddard Institute for Space Studies gestures during an interview with the Associated Press at his office in New York. (AP Photo/Mary Altaffer)
In this Thursday, Aug. 2 2012 photo, Dr. James E. Hansen head of the NASA Goddard Institute for Space Studies gestures during an interview with the Associated Press at his office in New York. (AP Photo/Mary Altaffer)
Opinions on Global Warming Shift with the Weather
Opinions on Global Warming Shift with the Weather
Opinions on Global Warming Shift with the Weather

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