The sun is to blame
Myth: Over the past few hundred years, the sun's activity, including the number of sunspots, has increased, causing the world to get warmer.
Science: In the last 35 years of global warming, the sun has shown a slight cooling trend, while the climate has been heating up, scientists say. In the past century, solar activity can explain some of the increase in global temperatures, but a relatively small amount. (Solar activity refers to the activity of the sun's magnetic field and includes magnetic field-powered sunspots and solar flares.)
A study published in the journal Atmospheric Chemistry and Physics in December 2011 revealed that even during a prolonged lull in the sun's activity, Earth still continued to warm. The study researchers found that the Earth absorbed 0.58 watts of excess energy per square meter than escaped back into space during the study period from 2005 to 2010, a time when solar activity was low.
The warmest decade on record was 2000 to 2009.
http://www.livescience.com/19466-climate-change-myths-busted.html
No comments:
Post a Comment