Five Fathom Bank Lightship (Figure 13, Table 13) 



Surface water temperatures , January through April were below the 

 mean; the minimum occurred in late February and was below the minima 

 for 1956 and 1957, but not as low as that for 1958. The relatively cold water 

 which appeared here in mid-January is identified by the lowered salinity 

 as having come from near shore. As at other stations the surface maximum 

 occurred in early September and was followed by 10 days of rapid cooling. 

 From May to October there was a series of penetrations of cold water at the 

 bottom. The intrusion in late July, not seen at the Barnegat station, also 

 appeared at Winter Quarter and Chesapeake. This was followed by consider- 

 able mixing which produced lower surface temperatures and rising bottom 

 values. The second intrusion was followed in mid-October by the final 

 autumn turnover. 



Surface salinities showed no unusual departures from the patterns 

 of previous years. The minimum occurred in July following a month of ex- 

 cessive rainfall. As at other stations, values were generally slightly above 

 the 19 58 readings and substantially below those for 19 57. 



