Oort, A. H., and Y-H. Pan, 1986: Interannual Variability of Surface Marine Fields. Technical Memorandum (NOAA TM ERL ESG-23), 149-155.

Abstract: Possible climatic trends in the zonal mean SST anomalies have been studied in five 10 degrees -lat.-wide belts at 50-60 degrees N, 20-30 degrees N, 10 degrees S-0 degrees. 30-20 degrees S, and 60-50 degrees S, where 41, 62, 76, 77, and 99% of the total area is covered by ocean. The COADS (Comprehensive Ocean Atmosphere Data Set) was used. The investigation procedure is described. The results, represented on graphs, show the following: an early warm period in the SST from 1870 to <> 1940 at all latitudes: a strong cooling between 1900 and 1910; a cold period between 1910 and 1930; and a warming period between 1930 and 1941. There is a trend toward cooling between the 1960s and the 1970s in the Northern Hemisphere middle and high latitudes in the Southern Hemisphere.