Climate Change & Global Warming

Natural variability can explain much of Earth's average temperature variation since the end of the last ice age, but over the past century, global average temperature has risen from near the coldest to the warmest levels in the past 11,300 years.

Tuesday, November 1, 2011

  • Satellite observations show that as the Arctic tundra has grown warmer in the past three decades, it has also grown “greener.”

  • Phytoplankton productivity has increased 20 percent over the past decade as sea ice extent declines and more open water habitat is available.