Oceanographic Observations North 



Pacific Ocean Station NOVEMBER 30' 00' N., 



140° 00' W., March 1967 -March 1968 



By David M. Husby 



INTRODUCTION 



The U.S Coast Guard has been conducting a 

 long-term series of oceanographic observations 

 at Ocean Station NOVEMBER (30°00' N., 

 140°00' W.) since July 1966 (Husby, 1968). 

 Investigations of oceanographic conditions in 

 this vicinity had been made prior to this time 

 by other organizations (Cochrane, 1950 and 

 Thomas and Amstutz, 1966). The location of 

 NOVEMBER in relation to the other Ocean 

 Stations in the world is shown in figure 1. The 

 sampling program originally consisted of daily 

 Nansen bottle casts to 1500 meters on alternate 

 21-day patrols. Since 7 January 1968 the pro- 

 gram has been expanded to daily Nansen bottle 

 casts on every patrol. Serial observations of 

 temperature and salinity are made at all sta- 

 tions. 



This report contains the oceanographic sta- 

 tion data from 195 stations at NOVEMBER be- 

 tween March 1967 and March 1968. The cruises 

 were the CGC KLAMATH, 20 March-8 April 

 1967; CGC PONTCHARTRAIN, 2-19 May 

 1967; CGC WINONA, 15 June-1 July 1967; 

 CGC PONTCHARTRAIN, 23 July-13 August 

 1967; CGC PONTCHARTRAIN, 3-24 Septem- 

 ber 1967 ; CGC TANEY, 15 October-5 Novem- 

 ber 1967; CGC KLAMATH, 26 November-17 

 December 1967; CGC TANEY, 7-28 January 

 1968; CGC WACHUSETT, 28 January-18 

 February 1968; CGC TANEY, 18 February-10 

 March 1968; and the CGC PONTCHARTRAIN, 

 10-31 March 1968. 



PROCEDURES 



The Ocean Station Vessels are normally re- 

 quired to maintain their position within a ten- 



mile square grid centered on Ocean Station 

 NOVEMBER (30°00' N., 140°00' W.) while 

 engaged in oceanographic operations. Occa- 

 sionally, the vessels are requested to move 

 their position due south to about 29°00' N., for 

 periods of from one to five days, for other op- 

 erational commitments. The bathymetry in the 

 vicinity of NOVEMBER is shown in figure 2. 



For the daily casts the desired sampling 

 depths are surface, 10, 30, 50, 75, 100, 150, 200, 

 300, 400, 600, 800, 1000, and 1500 meters. For 

 deep casts, an additional cast was made with 

 desired sampling depths of 2000, 2500, 3000, 

 3500, 4000, 4500, and 4600 meters (near bot- 

 tom). A pair of protected, deepsea reversing 

 thermometers was placed in each Nansen bot- 

 tle and, in addition, on five bottles from 200 to 

 1500 meters, an unprotected thermometer was 

 paired with the two protected ones for the 

 thermometric determination of the sampling 

 depths. Depths which were determined ther- 

 mometrically are preceded by a "T" in the sta- 

 tion data. Field observations of temperature 

 were transmitted via radio teletype to the 

 Coast Guard Oceanographic Unit, Washington 

 D.C. for real-time data processing and quality 

 control. Procedures used in the recording and 

 processing of the temperature data essentially 

 follow those outlined in U.S. Naval Oceano- 

 graphic Office Pub. No. 607 (Third ed., 1968) 

 and LaFond (1951). The Coast Guard Oceano- 

 graphic Unit uses a Digital Equipment Corpo- 

 ration PDP-5 computer to process the tempera- 

 ture data. 



Salinity samples were drawn from each 

 Nansen bottle and the salinity content of each 

 sample determined aboard ship using inductive 



