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RRS James Cook JC156 (FRidGE, GA13)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Cook (740H)
Cruise identifierJC156 (FRidGE, GA13)
Cruise period2017-12-20 — 2018-02-01
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnPointe-à-Pitre, Guadeloupe
PurposeResearch
ObjectivesFRidge – GA13 GEOTRACES Section.
Mobilisation for JC156 (GEOTRACES section GA13) commenced on the 15th of December 2017 and was completed in time for an on time departure on the morning of the 20th of December 2017. Our cruise track took us out into the English Channel and west towards the continental shelf break and the Bay of Biscay. We first conducted some test stations off Biscay and then sailed south towards the Iberian Peninsula for a cross over station with the French GEOTRACES GA01 cruise off Portugal. Following this we celebrated Christmas as we sailed west towards the Azores plateau. After sailing north of the Azores islands we turned southward and began tracking along the mid Atlantic ridge. On the 3rd of January we came alongside at Ponte Delgado in the Azores to collect an additional technician. Following science stations along the mid Atlantic ridge we sailed for port at Guadeloupe and arrived on the morning of the 1st of February 2018. Demobilisation was rapid as we had packed and cleaned during the steam to port.
Chief scientistAlessandro Tagliabue (National Oceanography Centre, Southampton)
ProjectGEOTRACES -Trace elements and their isotopes in the water column
Coordinating bodyNatural Environment Research Council (NERC)
Cruise reportRRS James Cook JC156 (FRidGE, GA13) cruise report jc156.pdf (7.11 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
SpecificMid Atlantic Ridge
Track chartsRRS James Cook JC156 (FRidGE, GA13) cruise track — jc156trk.pdf (0.12 MB) 
Measurements 
Chemical oceanography 
PhosphateQuantity: number of samples = 1154
Description: Phosphate (from SSR & Ti-Rosette) (1154 µmol/L)
NitrateQuantity: number of samples = 1154
Description: Nitrate (from SSR & Ti-Rosette) (1154 µmol/L)
SilicateQuantity: number of samples = 1154
Description: Silicate (from SSR & Ti-Rosette) (1154 µmol/L)
Trace elementsQuantity: number of samples = 294
Description: Particulate trace metals (from Ti rosette) (294 µmol/L)
Trace elementsQuantity: number of samples = 840
Description: Dissolved trace metals (from Ti-Rosette) (840 nmol/L)
Trace elementsQuantity: number of samples = 47
Description: Particulate trace metals (from SAPS) (47 µmol/L)
Other chemical oceanographic measurementsQuantity: number of samples = 315
Description: Helium (315 fmol/L)