BODC Cruise Metadata Report for RRS James Cook (740H) cruise JC089

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information
A summary of BODC data holdings for the cruise from the
- National Oceanographic Database
- Projects Database
References - including cruise tracks and cruise reports

Cruise Inventory Information

Long name	RRS James Cook (740H) cruise JC089
Short name	JC089
Objectives and Narrative	JC089 set sail from Vigo, Spain, on 04 August 2013, two days behind schedule. The objective of the cruise was to collect geophysical data, water column samples, and sediment cores to support a proposal under consideration by the Integrated Ocean Drilling Program (IODP) to drill a series of sites on the SW Iberian Margin. A total of 755 line kilometres of seismic reflection profiles were acquired using a three kilometre streamer and a small airgun source consisting of two generator-injector guns. There were significant problems with using two guns and the bulk of the survey was acquired using a single gun. Despite this problem together with weather downtime issues, data quality is generally good. Penetration of 3-4 seconds two-way travel time has been achieved at high fold with excellent resolution. The resulting set of crossing lines will provide an ideal basis for revising and resubmitting the IODP proposal which this cruise was designed to underpin. An important by-product of this seismic survey is imaging of the water column which has been calibrated by a combination of disposable hydrographic probes and CTD casts. Multibeam bathymetry and 3.5 kHz echosounder date were collected continuously during the seismic survey. 13 CTD casts were made using a trace metal free system to characterize the physical and chemical properties of water masses on the Iberian Margin, which will be used to interpret the water-column MCS profiles and for groundtruthing palaeoceanographic proxies in surface sediment. Water was collected at 13 stations using 10 liter Niskin bottles, totaling 246 bottles from which subsamples were taken for isotopic and elemental anlaysis.Sediment cores were acquired along a bathymetric transect ranging from 405 to 4670 m to meet IODP site survey requirements and study sediment processes (e.g., sediment provenance and focussing), bioturbation, and calibrate geochemical and sedimentological proxies on the Iberian Margin. A variety of coring systems were used including piston, Kasten, gravity, Megacore, and a grab sampler. Pore-water oxygen gradients were determined using micro-electrodes and interstitial waters were extracted from Megacore tubes at 1-cm intervals using Rhizon samplers (Rhizosphere Research Products, http://www.rhizosphere.com/).
Ship	RRS James Cook
Departure Port	Vigo, Spain
Departure Date	2013-08-04
Arrival Port	Vigo, Spain
Arrival Date	2013-08-27
Principal Scientist(s)	David Hodell (University of Cambridge Department of Earth Sciences)
Responsible Organisation	University of Cambridge Department of Earth Sciences
Associated Project(s)	Integrated Ocean Drilling Program (IODP)
IHB Sea Areas Visited	North East Atlantic Ocean (limit 40W)
Marsden Squares Visited	109;4/110;3
Work Area Description	Promonotorio dos Principes de Avis on the southwestern Iberian Margin.
Unable to lookup cruise bounds at this time
Work Area Bounding Polygon
Southern Limit	unknown
Northern Limit	unknown
Western Limit	unknown
Eastern Limit	unknown

Cruise Inventory Datasets

Physical oceanography
Bathythermograph	Quantity: number of deployments = 108 Description: Subsurface measurements underway (96 XBTs and 12 XCTDs)
CTD stations	Quantity: number of profiles = 13 Description: 13 CTD casts
CTD stations	Quantity: number of deployments = 108 Description: Subsurface measurements underway (96 XBTs and 12 XCTDs)
Current profiler (eg ADCP)	Quantity: activity duration in days = 25 Description: Underway vessel mounted ADCP
Subsurface temperature and salinity measurements	Quantity: number of deployments = 108 Description: Subsurface measurements underway (96 XBTs and 12 XCTDs)
Surface measurements underway (T,S)	Quantity: activity duration in days = 25 Description: Underway Surfnet Surface hydrography suite
Water bottle stations	Quantity: number of stations = 13 Description: 13 Water bottle stations totalling 246 bottles
Meteorology
Routine standard measurements	Quantity: activity duration in days = 25 Description: Underway Surfnet Meteorology suite
Geology and geophysics
Core - soft bottom	Quantity: number of cores = 93 Description: 93 total Megacore tubes taken at 13 stations
Core - soft bottom	Quantity: number of cores = 4 Description: 4 Gravity cores totalling 20.15 meters of sediment
Core - soft bottom	Quantity: number of cores = 10 Description: 10 Kasten cores totalling 35.9 meters of sediment
Core - soft bottom	Quantity: number of cores = 9 Description: 9 Piston cores totalling 80.8 meters of sediment
Core - soft bottom	Quantity: number of cores = 12 Description: 12 Box cores taken at 12 stations
Geophysical measurements made at depth	Quantity: activity duration in days = 25 Description: SBP120 Sub Bottom Profiler
Grab	Quantity: number of samples = 1 Description: Grab sample
Gravity measurements	Quantity: activity duration in days = 25 Description: Gravity
Magnetic measurements	Quantity: track kilometres = 755 Description: Magnetics - magnetometer deployed during seismic survey
Multi-beam echosounding	Quantity: activity duration in days = 25 Description: Multibeam sonar (Kongsberg EM120)
Multichannel seismic reflection	Quantity: track kilometres = 755 Description: 755 line kilometres of seismic reflection profiles were acquired using a 3-km streamer and a small airgun source consisting of two generator-injector guns.
Other geological/geophysical measurements	Quantity: number of deployments = 6 Description: Stand-Alone Pumps (SAPs)
Single-beam echosounding	Quantity: activity duration in days = 25 Description: Single beam echosounder (EK60 Echo Sounder and Kongsberg EA600)