WHP Ref. No.: PR6
Last Updated: 12 April, 1996


A.	Cruise Narrative

A.1	Highlights

A.1.a	WOCE designation	PR06
				 

A.1.b	EXPOCODE		18DD9601/1 

A.1.c	Chief Scientist		Frank Whitney 
				Institue of Ocean Sciences
				PO Box 6000
				9860 West Saanich Road
				Sidney, B.C.
				V8L-4B2
				Phone: 604-363-6807
				Fax: 604-363-6816


A.1.d	Ship			 John P. Tully
	
A.1.e	Ports of call		 None
 				 
A.1.f	Cruise dates		February 19 to March 8, 1996 

A.2	Cruise Summary Information

A.2.a	Geographic boundaries

Line PR6 starts at the mouth of Juan de Fuca Strait on the west coast 
of Canada, and heads almost due west for 900 n mi.  The terminal 
station is PRS1, formerly designated Ocean Weather Station Papa (50 N, 
145 W).  

A.2.b	Stations occupied

Table of Stations by type

Sample type:	No. stations:	Max. depth (m):	
-----------------------------------------------
CTD casts	       27	4300 db	
Rosette/Hydro casts	4	4200	
Loop samples	       31	5	
Profiling Alace float	1	800	
Surface drifters	2	20	
------------------------------------------------ 

A.2.c	Floats and drifters deployed

A profiling Alace float was deployed at station PRS1.  Surface 
drifters that collect temperature and barometric pressure data were 
deployed at  stations P20 and PRS1 for the Department of the 
Environment.


A.2.d	Moorings deployed or recovered

 
A.3	List of Principal Investigators

Principal Investigators
----------------------------------------------  
Howard Freeland	Ocean circulation 	IOS	
C.S. Wong	Climate chemistry	IOS	
Frank Whitney	WOCE coordinator	IOS	
Philip Boyd	JGOFS coordinator	UBC	
----------------------------------------------

 
A.4	Scientific Programme and Methods

Our repeat hydrography section continues to be a joint program with 
Canadian JGOFS.

A CTD survey along Line PR6 was completed, except for 2 stations which 
were omitted due to weather.  Salinity, oxygen and nutrients (NO3 & 
NO2, PO4 and Si) were analyzed onboard ship from rosette casts at 4 
stations.    DMS was analyzed in sea water, to a depth of 400 m.  

A profiling Alace float (T/S/P), ballasted to rest at 800 m, was 
deployed near station PRS1 (Ocean Station Papa).  Near the current 
location of an Alace float that was launched in September 1995, we 
took a CTD cast to check for sensor drift.

JGOFS participants collected samples for biomass estimates at 4 
stations, and incubated water to measure growth and grazing rates of 
various groups of plankton.  A large volume in situ pumping system (J. 
Bishop) was successfully deployed only at station PRS1.

Typical winter conditions were encountered along Line PR6.  Optical 
measurements indicate that biomass in the surface was higher at PRS1 
than nearer the coast.  A current meter positioned deep in the mixed 
layer at PRS1 recorded the breakdown of the summer thermocline in 
mid-October.  Temperature abruptly increased as heat was mixed into 
the surface layer. 

Goals Achieved:

CTD survey of Line PR6, minus 2 stations .  

Successful Rosette casts at 4 stations on Line P. Completion of JGOFS 
sampling for plankton and productivity measurements. One large volume 
pump station at PRS1 for particulates. A mooring with an optical 
package and S4 current meter, both in the mixed layer, was recovered 
and redeployed.


A.5	Major Problems and Goals not Achieved

Less water sampling and pumping was completed than had been planned, 
due to poor weather. A ground fault limited the work completed with 
the pumping system. The optical instrument on the mooring failed.  No 
useful data was recovered from it.

  
A.6	Other Incidents of Note

A.7	List of Cruise Participants

Cruise Participants & Affiliations

Name			Responsibility		Institution
--------------------------------------------------------------------
Frank Whitney		Nutrients, watch		IOS	
Bernard Minkley		Oxygen, watch			IOS	
Nick Hall-Patch		Salts, watch			IOS	
Wendy Richardson	DMS, watch			IOS	
Tim Soutar		Watch, pCO2			IOS	
Ron Bellegay		Watch, carbonates		IOS	
Philip Boyd		Phytoplankton			UBC	
Robert Goldblatt	Zooplankton biomass		UBC	
Hugh Maclean		Watch, plankton sampling	UBC	
Nelson Sherry		Bacteria			UBC	
Maureen Soon		particulate 13C & 15N		UBC	
Suzanne Roy		Zooplankton excretion		Rimouski U.	
Ken Crocker		Zooplankton grazing		Memorial U.	
Jennifer Putland	Micro-zooplankton		Memorial U.	
Jim Bishop		pump sampling			U. Victoria	
Todd Mudge		pump sampling			U. Victoria
Stacey Cooper		pump sampling			U. Victoria
--------------------------------------------------------------------
IOS= Institue of Ocean Sciences, Sidney, B.C., Canada.
UBC=University of British Columbia, Vancouver, B.C., Canada	
