Physical Mechanisms
The cooling period is well reproduced by current (1999 on) global climate models (GCMs) that include the physical effects of sulphate aerosols, and there is now general agreement that aerosol effects were the dominant cause of the mid-20th century cooling. However, at the time there were two physical mechanisms that were most frequently advanced to cause cooling: aerosols and orbital forcing.
Read more about this topic: Global Cooling
Famous quotes containing the word physical:
“There are two kinds of timidity—timidity of mind, and timidity of the nerves; physical timidity, and moral timidity. Each is independent of the other. The body may be frightened and quake while the mind remains calm and bold, and vice versë. This is the key to many eccentricities of conduct. When both kinds meet in the same man he will be good for nothing all his life.”
—Honoré De Balzac (1799–1850)