A new study published recently in the journal "Nature" suggests global warming is greater than previously thought. The Great Lakes Radio Consortium’s Lester Graham reports:
Transcript
A new study published in the most recent issue of the journal ‘nature’
suggests global warming is greater than previously thought. The Great Lakes
Radio Consortium’s Lester Graham reports….
This new study analyzed temperature data from holes bored deep into the
earth. As atmospheric temperatures warm, the rock in the earth stores the
heat. Henry Pollack is a professor at the University of Michigan. He and his
colleagues analyzed temperature data from more than 600 boreholes around the
globe. They found the temperature has increased about one-point-eight degrees
Fahrenheit in the last five centuries.
“Half of that has taken place in the 20th century. And 80-percent
of it is in the 19th and 20th centuries.”
Other studies of global climate change have looked at indirect effects…
things such as the growth of coral reefs, tree rings, or ice cores. Pollack
says studying boreholes is more direct, and the findings different.
“We show that there’s been an even greater warming over the past
five centuries than some of the other methods have suggested.”
Pollack says they’ll now try to get further temperature measurements from
more sensitive areas of the globe, and try to refine how they analyze the
data.
For the Great Lakes Radio Consortium, this is Lester Graham.