Long Term Increase In Fog Occurrence Over The NW Pacific And NW Atlantic Fog Maximums

ICOADS Ship weather observations were examined for 1950-2007. Deep fog occurring at the time of the observation is a subjective estimate to categorize the weather. During June, July and August, the maximum marine occurrences of deep fog for the word are centered over the Ohyashio current in the NW Pacific and the Labrador current in the NW Atlantic. The decadal average deep fog occurrence over both maximums have increased fairly steadily and significantly over 1950-2007. There is an increase in the temperature of the ocean surface under the fog maximums.