In its 2013 Atlantic hurricane season outlook issued today, NOAA's Climate Prediction Center is forecasting an active or extremely active season this year.
Posted
May 15, 2013Physical Climate, Observations, Carbon Cycle
On May 9, 2013, the daily mean concentration of carbon dioxide in the atmosphere surpassed 400 parts per million (ppm) for the first time since measurements began in 1958 at Mauna Loa Observatory in Hawaii.