Insomnia Log

This is what keeps me awake at night???

Who needs sleep? (well you’re never gonna get it)
Who needs sleep? (tell me what’s that for)
Who needs sleep? (be happy with what you’re getting,
There’s a guy who’s been awake since the second world war)

-- words and music by Steven Page & Ed Robertson

Location: Boulder, Colorado, United States

Everything you need to know about me can be found in my posts

Tuesday, March 30, 2010

Six Degrees of Climate Separation

Until recently, the best scientific estimates of atmospheric carbon dioxide only went back about 800,000 years. This time has been a generally cold period in the Earth's history, characterized by ice ages punctuated with brief, relatively warm spells (one of which we`re in right now) every 100,000 years.

During this time there has been a strong correlation between CO2 in the atmosphere and global average temperatures. But also during this time CO2 hasn't approached today's human-influenced level, so we didn't have direct evidence of what happens when levels of the greenhouse gas are this high.

Late last year, a group of scientists at UCLA published a study demonstrating a new method of estimating prehistoric CO2 levels, extending the estimates back about 20 million years.

Not only do these measurements continue to show a strong correlation between CO2 and climate, they also illuminate the most recent time in the Earth's history when CO2 levels were similar to what they are today.


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