Cruise inventory

RRS John Murray JM12/76 (B/8/76)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM12/76 (B/8/76)
Cruise period1976-09-01 — 1976-09-08
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnPlymouth, United Kingdom
PurposeResearch
Objectives1. To consolidate Bristol Channel Chemical Data
2. To continue investigations of short-term variability in the Bristol Channel sediment resuspension zone.
3. To characterise the Celtic Sea component of the Bristol Channel admixture.
4. To investigate the influence of land drainage from the north coast of Devon and Cornwall on the chemistry of the Bristol Channel and Celtic Sea.
5. To occupy an anchor station as part of the SETWP multiboat sampling investigation, over a tidal period.
6. To collect sediment samples for metal analysis.
Chief scientistAlan W Morris (Institute of Marine Environmental Research, Plymouth)
Cruise reportRRS John Murray JM12/76 (B/8/76) cruise report john_murray9-10sept_76.pdf — access key 'C' (0.08 MB) 
Ocean/sea areas 
GeneralBristol Channel
Track chartsRRS John Murray JM12/76 (B/8/76) cruise track — trk1652a.html RRS John Murray JM12/76 (B/8/76) cruise track — trk1652c.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 1200
Chemical oceanography 
PhosphateQuantity: number of stations = 104
NitrateQuantity: number of stations = 104
NitriteQuantity: number of stations = 104
SilicateQuantity: number of stations = 104
Trace elementsQuantity: number of stations = 67
Contamination 
Suspended matterQuantity: number of stations = 104
Geology and geophysics 
GrabQuantity: number of samples = 77
Description: chemical analysis of sediments