Temperature 



Water temperature data were obtained by use 

 of Bissett-Berman model 9006 (1971) and 9040 

 (1972) STD underwater sensor units, paired re- 

 versing thermometers attached to Nansen and/or 

 Niskin bottles, and by XBT's calibrated with 

 bucket thermometer readings. 



Salinity 



Water samples were drawn from Teflon lined 

 Nansen and/or Niskin bottles for salinity deter- 

 minations conducted on board with inductive 

 salinometers. The salinities were calibrated with 

 standard (Copenhagen) water at least once per 30 

 samples. Conductivity values obtained were con- 

 verted to salinity values by use of the Interna- 

 tional Oceanographic Tables published jointly by 

 UNESCO and the National Institute of Oceanog- 

 raphy of Great Britain (UNESCO, 1966). Salinity 

 determinations were also made in situ with the 

 STD sensor unit. 



Dissolved Oxygen Concentrations 



Water samples were drawn from Teflon lined 

 Nansen and/or Niskin bottles for shipboard 

 analysis of dissolved oxygen by means of a mod- 

 ified Winkler titration (Strickland and Parsons, 

 1968). Values of percent saturation were com- 

 puted utilizing a computer program based on ta- 

 bles of oxygen saturation developed by Green and 

 Carritt (1967). 



Dissolved Nutrients 



A Technicon AutoAnalyzer R Model I was 

 employed in carrying out analyses for dissolved 

 nutrients. The resulting extinction values 

 were converted to concentrations, in 

 microgram-atoms/Iiter, taking into account the 

 salt effect. The nitrite procedure is based on the 

 manual procedure of Bendschneider and Robin- 

 son (1952) with absorbance being measured at 

 520 nm. The nitrate procedure is based on an 

 automated version of the manual procedure of 

 Wood, Armstrong, and Richards (1968), differ- 

 ing in that absorbance is measured at 520 nm. 

 Molybdate complexes of phosphate and silicate 

 were reduced to form colored complexes. The 

 silicate procedure is based on the automated 



method of Armstrong, Stearns, and Strickland 

 (1967) except that a slightly different sample and 

 diluent tube size are used and absorbance is 

 measured at 815 nm. The phosphate procedure is 

 that of Jadamec, Hufford, and Fortier (unpub- 

 lished manuscript) which utilizes an ascorbic 

 acid-antimony reducing agent and measures ab- 

 sorbance at 700 nm. 



Currents 



Direct measurements of currents were made 

 from the CGC GLACIER at the surface, 20 me- 

 ters, and near bottom while at anchor at 5 stations 

 during WEBSEC-71 (fig. 2). Hydroproducts 

 model 501 and Geodyne model 102 recording 

 current meters were used and were allowed to run 

 for periods ranging from 6 to 24 hours. Strip 

 charts from the Hydroproducts meters were dig- 

 itized by hand yielding data points at 3-V2 minute 

 intervals. Calibration corrections were applied to 

 the speed, and corrections were also made for 

 magnetic variation and direction. The 

 data were processed to yield vector averages of 15 

 minutes and give progressive vector diagrams. 

 The photographic records from the Geodyne cur- 

 rent meters were processed by machine yielding 

 data points at 1 minute intervals. The data were 

 also processed to give 15 minute and overall 

 vector sums. A total of 62 short term currents 

 measurements using Geodyne 102 current meters 

 was made from the vessel during WEBSEC-72. 

 An anchored current meter array with two 

 Geodyne 102 current meters (one at 25 meters, 

 the other at .50 meters) was placed on the conti- 

 nental shelf just east of Point Barrow, Alaska for 

 36 days and subsequently recovered (fig. 3). Pro- 

 cessing of the data was done by EG&G Company 

 of Waltham, Massachusetts. 



Meteorological Observations 



Surface meteorological observations were 

 made at 3-hour intervals and on each station. 

 Upper air observations were not taken due to a 

 lack of sufficient personnel. 



Quality Control 



Initial quality control of all physical and chem- 

 ical oceanographic data was performed on board 



