Stevenson, R.E.U.S. Fish and Wildlife Service Circular2010-02-152010-02-151966http://hdl.handle.net/1969.3/18959p. 33-43.This report stems from a program initiated in 1965 to describe the oceanographic environment of the Gulf of Mexico. Objectives of the program that are discussed in this report are to: (1) define the water masses and subunits, and their variations; (2) enumerate those atmospheric and oceanographic factors that produce variations and modifications of the waters; (3) determine the range of the variations and modifications in time and space; and (4) combine these evaluations into practical techniques of forecasting oceanographic conditions in the fishing waters of the Gulf of Mexico.physical oceanographyenvironmental conditionsmeteorologyhydrologywater massesArticle