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Images: The Bermuda Station S—A Long-Running Oceanographic Show

During the cold winter of 1977, Val Worthington ventured out aboard as the National Oceanic and Atmospheric Administration's Researcher to study the formation of 18° Water, one of the principal North Atlantic water masses, in the northern Sargasso Sea. In the photo, Worthington is leaving the "hero platform" after launching a Nansen bottle cast

Unfortunately, Worthington?s efforts were devoted to a period of minimum production of this water. In contrast to this minimum period in 1976 (denoted by red curves of temperature and potential density), a period of maximum climatological production occurred in 1964 (blue curves). In both cases, the plot shows the annually averaged properties for both calendar years vs. pressure to reduce eddy noise. Note that the underlying thermocline at pressures of more than 600 decibars is similar in both periods: Changes are not induced from below.

Unfortunately, Worthington?s efforts were devoted to a period of minimum production of this water. In contrast to this minimum period in 1976 (denoted by red curves of temperature and potential density), a period of maximum climatological production occurred in 1964 (blue curves). In both cases, the plot shows the annually averaged properties for both calendar years vs. pressure to reduce eddy noise. Note that the underlying thermocline at pressures of more than 600 decibars is similar in both periods: Changes are not induced from below.

The location of Station S is a short steam southeast from St. Georges? harbor. The smoothed bathymetry is plotted at one kilometer depth increments