250 years of global warming: Berkeley Earth releases new analysis

ScienceDaily: Earth Science News

Tiny airborne pollutants lead double life

Posted: 30 Jul 2012 12:50 PM PDT

Researchers have provided visual evidence that atmospheric particles separate into distinct chemical compositions during their life cycle. Observations could have important implications for modeling global climate change and predicting air quality conditions.

250 years of global warming: Berkeley Earth releases new analysis

Posted: 30 Jul 2012 11:25 AM PDT

According to a new Berkeley Earth study released July 29, the average temperature of Earth’s land has risen by 1.5 °C over the past 250 years. The good match between the new temperature record and historical carbon dioxide records suggests that the most straightforward explanation for this warming is human greenhouse gas emissions.

Cooling, not population loss, led to fewer fires after 1500 in New World

Posted: 30 Jul 2012 06:41 AM PDT

After Columbus’ voyage, burning of New World forests and fields diminished significantly – a phenomenon some have attributed to decimation of native populations. But a new study suggests global cooling resulted in fewer fires because both preceded Columbus in many regions worldwide.
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