Cruise inventory

RRS Discovery D21

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD21
Cruise period1968-01-14 — 1968-04-01
StatusCompleted
Port of departurePlymouth, United Kingdom
Port of returnPlymouth, United Kingdom
PurposeResearch
ObjectivesObjectives

1. Continue investigations into the vertical distribution of zooplankton by a programme of day and night sampling with depth monitored opening/closing nets at a position far enough south to examine a fauna quite distinct from that examined at the Fuerteventura position.
2. Make observations at the Fuerteventura position at a different season of the year.
3. Try to discover the 'whereabouts of the faunal boundary between the 'southern' fauna and that found at Fuerteventura.
4. Make a preliminary survey of the upwelling regions of the NW African continental shelf to compare the vertical distribution of plankton in upwelling and nonupwelling areas.
Chief scientistPeter M David (National Institute of Oceanography)
Cruise reportRRS Discovery D21 cruise report d021.pdf — access key 'C' (1.34 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificNorthwest African continental shelf
Track chartsRRS Discovery D21 cruise track — d021trk.pdf (0.04 MB) 
Data held at BODC 
Series/Profiles 
2  CTD/STD cast
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column

BODC idDate/TimeLocationDoc.
2970971968-02-21 20:18 10° 28' 0" N  19° 43' 0" W  View metadata report for BODC series reference number 297097
2971041968-02-29 09:05 10° 9' 29" N  20° 41' 30" W  View metadata report for BODC series reference number 297104