Recent Climate Changes in the Northern Hemisphere

The consistency of analyzed changes in surface wind stress, sea level pressures and surface temperatures between 1980–86 and previous periods indicates the reality of statistically significant and substantial climate changes in the Northern Hemisphere, especially over the North Pacific, on decadal time scales. Cooling in North Pacific sea surface temperatures and warming along the west coast of North America and Alaska are ascribed mainly to the changes in thermal advection associated with a deeper and more extensive Aleutian Low.