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BODC Cruise Metadata Report for RRS Discovery (74E3) cruise D313 (DOGEE SOLAS)

Introduction

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

Cruise Inventory Information

Long name RRS Discovery (74E3) cruise D313 (DOGEE SOLAS)
Short name D313 (DOGEE SOLAS)
Objectives and Narrative RRS Discovery cruise D313 involved two distinct but inter-related UKSOLAS projects: DOGEE-SOLAS (The UK SOLAS Deep Ocean Gas Exchange Experiment), P.I. Rob Upstill-Goddard, University of Newcastle upon Tyne, and SEASAW (Sea Spray and Whitecaps), P.I. Ian Brooks, University of Leeds. Both projects are primarily concerned with physical exchange processes at the air-sea interface and the determination of gas transfer velocities. Additionally SEASAW aims to quantify sea-salt aerosol source functions. The projects thus have a common overall research goal; parameterization of the air-sea gas and aerosol exchange processes, which is essential for effectively modelling climate. Significantly reducing the associated uncertainties is a central goal of UK SOLAS, of which this cruise was a component. In brief, specific cruise objectives were:

* Determine open ocean gas transfer velocities at high wind speeds through a dual-tracer release (3He & SF6).
* Measure underway, total gas tension, dissolved O2, and CO2 to obtain independent air-sea gas exchange estimates.
* Record key meteorological variables
* Measure air-sea fluxes of CO2, sensible heat, latent heat and momentum using the AUTOFLUX automated sensor array.
* Quantify flow distortion biases in the direct flux measurements via the use of established models.
* Determine the sea spray source function by direct eddy-covariance, and optical and condensation particle counters.
* Investigate production and fate of sea spray aerosols at the sea surface using optical particle and bubble observations.
* Study aerosol particle composition to identify sources and interactions between the sea spray and other aerosol and gases.
* Record and measure whitecap coverage and wave breaking coincident with the air-sea flux measurements
* Quantify acoustically, bubble populations produced by breaking waves.

Unfortunately, due to a combination of exceptionally bad weather, downtime due to CTD loss and winch replacement, and major ship systems failure, most of the major cruise objectives were not met at all and some were only partially fulfilled.
Ship RRS Discovery
Departure Port Govan, United Kingdom
Departure Date 2006-11-07
Arrival Port Govan, United Kingdom
Arrival Date 2006-12-06
Principal Scientist(s) Robert Upstill-Goddard (Newcastle University School of Marine Science and Technology)
Responsible Organisation Newcastle University School of Marine Science and Technology
Associated Project(s) UK SOLAS
IHB Sea Areas Visited North East Atlantic Ocean (limit 40W)
Marsden Squares Visited 181/182
Work Area Description NE Atlantic west of Scotland and Scottish Western Isles: 55-57N, 05-12W
Work Area Bounding Polygon 50N,20W; 60N,20W; 60N,0E; 50N,0E; 50N,20W
Southern Limit 50N
Northern Limit 60N
Western Limit 20W
Eastern Limit 0E

Cruise Inventory Datasets

Physical oceanography  
Geochemical tracers (eg freons) Quantity: activity duration in days = 3
Description: Underway continuous (every 4 min) measurements of surface (6m) SF6 tracer by electron capture detection gas chromatography  
Geochemical tracers (eg freons) Quantity: number of stations = 8
Description: Vertical CTD casts (mixed layer, 150-300m): 3He tracer: collected but not analysed (on-shore mass spectrometry) due to failure of cruise objectives  
Geochemical tracers (eg freons) Quantity: number of stations = 8
Description: Vertical CTD casts (mixed layer, 150-300m): SF6 tracer by electron capture detection gas chromatography  
Chemical oceanography  
Carbon dioxide Quantity: activity duration in days = 11
Description: Underway (5m) dissolved O2, dissolved CO2, total gas tension, temperature and salinity.  
Carbon dioxide Quantity: activity duration in days = 20
Description: Ship-mounted continuous underway surface pCO2 by gas equilibration/LICOR detection: CASIX system.  
Carbon dioxide Quantity: activity duration in days = 20
Description: continuous underway surface pCO2 by gas equilibration/LICOR detection:  
Carbon dioxide Quantity: number of stations = 6
Description: Vertical CTD casts (mixed layer, 150-300m): discrete pCO2 by gas equilibration/LICOR detection.  
Other dissolved gases Quantity: activity duration in days = 11
Description: Underway (5m) dissolved O2, dissolved CO2, total gas tension, temperature and salinity.  
Oxygen Quantity: activity duration in days = 11
Description: Underway (5m) dissolved O2, dissolved CO2, total gas tension, temperature and salinity.  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
55° 18' N 5° 24' W Instrumented wave measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered, redeployed and recovered.
55° 18' N 5° 24' W Instrumented wave measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered, redeployed and recovered.
56° 49' N 6° 0' W Instrumented wave measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered.
56° 48' N 5° 15' W Instrumented wave measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered.
56° 25' N 11° 15' W Neutrally buoyant floats Neutrally buoyant float for oxygen, nitrogen, salinity and temperature measurements for use in air-sea flux calculations. Lost during cruise; recovered post-cruise
56° 25' N 11° 15' W Other dissolved gases Neutrally buoyant float for oxygen, nitrogen, salinity and temperature measurements for use in air-sea flux calculations. Lost during cruise; recovered post-cruise
56° 46' N 5° 13' W Other meteorological measurements Tethered Meteorological buoy: aerosol probes and near-surface bubble imaging. Recovered.
55° 21' N 5° 22' W Other meteorological measurements Tethered Meteorological buoy: aerosol probes and near-surface bubble imaging. Recovered.
56° 44' N 5° 13' W Other meteorological measurements Tethered Meteorological buoy: aerosol probes and near-surface bubble imaging. Recovered; damaged by ship hull
55° 18' N 5° 24' W Other physical oceanographic measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered, redeployed and recovered.
55° 18' N 5° 24' W Other physical oceanographic measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered, redeployed and recovered.
56° 49' N 6° 0' W Other physical oceanographic measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered.
56° 48' N 5° 15' W Other physical oceanographic measurements NOC Spar buoy: wave wire and acoustic bubble data. Recovered.
56° 46' N 5° 13' W Other physical oceanographic measurements Tethered Meteorological buoy: aerosol probes and near-surface bubble imaging. Recovered.
55° 21' N 5° 22' W Other physical oceanographic measurements Tethered Meteorological buoy: aerosol probes and near-surface bubble imaging. Recovered.
56° 44' N 5° 13' W Other physical oceanographic measurements Tethered Meteorological buoy: aerosol probes and near-surface bubble imaging. Recovered; damaged by ship hull
56° 25' N 11° 15' W Oxygen Neutrally buoyant float for oxygen, nitrogen, salinity and temperature measurements for use in air-sea flux calculations. Lost during cruise; recovered post-cruise
56° 44' N 11° 18' W Subsurface temperature measurements Surface Argos/RF drifter/drogue/thermistor chain: position location for gaseous tracer patch. Lost during cruise; not recovered.
56° 44' N 11° 18' W Surface drifters/drifting buoys Surface Argos/RF drifter with drogue: position location for gaseous tracer patch. Lost during cruise;not recovered
56° 44' N 11° 18' W Surface drifters/drifting buoys Surface Argos/RF drifter/drogue/thermistor chain: position location for gaseous tracer patch. Lost during cruise; not recovered.

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
1 Pumped air sample Data are currently being processed

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
1028885 Pumped air sample 2006-11-16 11:04Z to 2006-12-02 01:25Z 55° 14' N to 58° 36' N; 12° 2' W to 5° 4' W Click for more

Project Database

# Events Gear Type Parameters Held
9 CTD frame plus rosette sampler Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Optical backscatter
Temperature of the water column
Dissolved oxygen parameters in the water column

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

References

Track Charts

Track Chart

Reports

Cruise Report