BODC Cruise Metadata Report for RRS James Cook (740H) cruise JC152

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 JC152
Short name	JC152
Objectives and Narrative	Cruise JC152 collected the major data sets for the CHIMNEY (Characterisation of major overburden leakage pathways above sub-seafloor CO2 storage reservoirs in the North Sea) NERC highlights research programme. The cruise investigated the Scanner and Challenger pock marks in the North Sea, which were previously known to be the locations of vigorous Methane venting. The cruise objectives were to collect data that could be used to constrain the geometry and internal structures of fluid flow "Chimney" structures with the eventual aim of determining the current permeability of the sub-surface. The cruise successfully completed two anisotropy experiments over the Scanner and Challenger pock marks by shooting various seismic sources into a grid of 25 and 7 ocean bottom seismometers respectively. Five different seismic sources (Bolt airguns, GI guns, Squid surface sparker, Duraspark surface sparker, and Deep Tow Sparker) were recorded by the ocean bottom seismometers, and an acoustic recorder deployed c. 25 m above the seabed. Multichannel seismic reflection profiles were collected with GI guns and both surface sparker sources, and single channel seismic reflection profiles were collected with the Deep Tow Sparker source. Single and multichannel echo sounder data were collected along all seismic profiles.
Ship	RRS James Cook
Departure Port	Southampton, United Kingdom
Departure Date	2017-08-25
Arrival Port	Leith, United Kingdom
Arrival Date	2017-09-12
Principal Scientist(s)	Jonathan M Bull (National Oceanography Centre, Southampton)
Responsible Organisation	National Oceanography Centre, Southampton
Associated Project(s)	CHIMNEY
IHB Sea Areas Visited	North Sea
Marsden Squares Visited	216;3
Work Area Description	Northern North Sea
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
Other physical oceanographic measurements	Quantity: number of stations = 4 Description: Sound velocity/temperature versus depth
Geology and geophysics
Geophysical measurements made at depth	Quantity: number of stations = 2 Description: Broadband hydrophone deployments in the water column. Passive recordings.
Multi-beam echosounding	Quantity: activity duration in days = 14 Description: Swath bathymetry along all tracks
Multichannel seismic reflection	Quantity: activity duration in days = 10 Description: Multichannel seismic reflection profiling with GI guns or surface sparkers
Seismic refraction	Quantity: activity duration in days = 11 Description: Seismic Refraction into OBS
Seismic refraction	Quantity: number of stations = 32 Description: Ocean Bottom Seismometer Deployments (OBIC)
Single channel seismic reflection	Quantity: activity duration in days = 1 Description: Deep Tow Sparker Single Channel Seismic Reflection profiling
Single-beam echosounding	Quantity: activity duration in days = 14 Description: Single beam echo sounding along all tracks