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BODC Cruise Metadata Report for RRS Discovery (74E3) cruise D317

Introduction

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

Cruise Inventory Information

Long name RRS Discovery (74E3) cruise D317
Short name D317
Objectives and Narrative This study is primarily concerned with physical exchange processes at the air-sea interface and the determination of sea-salt aerosol source functions and gas transfer velocities. The scientific goals of SEASAW are to:

1. Establish the impact of various forcing parameters on the transfer velocity of CO2 and improve its parameterisation. The transfer velocity will be related to the transfer velocity of other trace gases via the Schmidt number.
2. Determine the sea spray source function via direct eddy-covariance methods using ultrasonic anemometers alongside fast-response optical particle counters and condensation particle counters.
3. Investigate wave breaking and whitecap production coincident with air-sea flux measurements, in order to provide increased understanding and improved parameterisation of wave breaking and whitecap production which is related to the observed air-sea fluxes.
4. Investigate the production and fate of sea spray aerosol particles very close to the ocean surface by means of 10Hz optical particle counter observations with sub-surface bubble observations.
5. Utilise a single particle aerosol mass spectrometer and associated instruments to study the composition of individual aerosol particles as a means of source apportionment and to investigate interactions between the sea spray aerosol and other aerosol and gaseous components.

Measurements of background aerosol and turbulent fluxes are made continuously, during transits as well as designated measurement periods on station. Data are generally useful ONLY when the wind is from over the bows. When on station ship is hove to, with wind within 30 degrees of bows. Short duration deployemnts of a tethered buoy are made intermittently throughout the cruise to measure aerosol at ~0.7 and 1.0 m above the surface, and bubble spectra ~0.42m below the surface.

LEEDS INSTRUMENTATION

Foremast Flux system:
Gill R3A sonic anemometer - 3D turbulent wind components at 50Hz
LiCOR 7500 open path gas analyzer - H2O and CO2 concentrations at 20Hz
2 CLASP aerosol probe - 16-bin aerosol spectra at 10Hz, 0.05 to 3.5 ?m radius
2 motion packs - 3-axis linear accelerations, pitch, roll, and heading at 20Hz.
Fast Lightweight Ozone Sensor (FLOS) : ozone concentration at 20Hz
INSTRUMENT - Mean ozone concentration

Background Aerosol:
PMS OAP
PCASP
Grimm CPC
Grimm dust monitor

Aerosol Composition:
TSI ATOFMS - single particle aerosol mass spectrometer providing chemical composition
Aethalometer - black carbon loading
VACC - PMS PCASP and volatility system providing chemical composition and mixing mode information via changes in aerosol spectra with temperature

Aerosol Buoy:
2 CLASP aerosol probes with inlets at ~0.7 and 1m above the surface
Subsurface bubble camera provided by TNO - photographic images of bubble populations at ~0.42m below the surface
3D motion pack (3-axis accelerometer, pitch, roll, and heading at 20Hz.

NOC INSTRUMENTATION

AUTOFLUX system:
2 x Gill sonic anemometers
2 x LiCOR 7500 open path gas analyzers
1 x motion pack
Ship RRS Discovery
Departure Port Glasgow, United Kingdom
Departure Date 2007-03-21
Arrival Port Lisbon, Portugal
Arrival Date 2007-04-12
Principal Scientist(s) Ian Brooks (University of Leeds School of Earth and Environment)
Responsible Organisation University of Leeds School of Earth and Environment
Associated Project(s) UK SOLAS
IHB Sea Areas Visited North East Atlantic Ocean (limit 40W)
Marsden Squares Visited 146/147/181/182/183
Work Area Description North East Atlantic
Work Area Bounding Polygon 40N,30W; 60N,30W; 60N,0E; 40N,0E; 40N,30W
Southern Limit 40N
Northern Limit 60N
Western Limit 30W
Eastern Limit 0E

Cruise Inventory Datasets

Meteorology  
Other meteorological measurements Quantity: activity duration in hours = 396
Description: PCASP - aerosol spectra 0.05-1.5 micron radius  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: 2 x LiCOR 7500 open path gas analyzer - CO2 and H20 concentrations at 20Hz  
Other meteorological measurements Quantity: activity duration in hours = 384
Description: GRIMM OPC - aerosol spectra 0.23 - 20 micron radius  
Other meteorological measurements Quantity: activity duration in hours = 384
Description: Volatility - aerosol spectra 0.05 - 1.5 micron radius, with heated inlet (ambient to 900 celsius)  
Other meteorological measurements Quantity: activity duration in hours = 276
Description: ATOFMS - single particle mass spectrometry  
Other meteorological measurements Quantity: activity duration in hours = 420
Description: Aethalometer - atmospheric black carbon loading  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: Automatic weather station - temperature, humidity, pressure, wind speed and direction  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: FLOS - 20Hz atmospheric ozone concentration, sited on foremast for flux measurement  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: Dasibi UV analyszer - atmospheric ozone concentration  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: Sonic anemometer, turbulent wind measurements at 20Hz, sited on foremast  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: Motion pack on foremast - 3-axis accelerometers and pitch, roll, heading angles at 20Hz  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: LiCOR 7500 open path gas analyzer - CO2 and H20 concentrations at 20Hz  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: CLASP - aerosol spectra 0.05 - 3.5 micron radius at 10Hz. Sited on foremast for turbulent flux measurements  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: 2 x Sonic anemometer, turbulent wind measurements at 20Hz, sited on foremast  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: Motion pack on foremast - 3-axis accelerometers and pitch, roll, heading angles at 20Hz  
Other meteorological measurements Quantity: activity duration in hours = 432
Description: OAP - aerosol spectra 5-150 micron radius  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
59° 59' N 15° 12' W Instrumented wave measurements Station D317/002 #1 (24/03/2007 09:15 - 13:15) Tethered buoy measuring: aerosol particles at 0.7 and 1.0 m above surface, bubble spectra at 0.42 m below surface, and wave heights via buoy motion pack. Buoy monitored by webcam - images recorded every second. ~4 hours data collected
56° 57' N 8° 16' W Instrumented wave measurements Station ID D317/001 #1 (22/03/2007 09:30 - 13:00) Tethered buoy test deployment. All systems run, but whitecaps marginal, useful data not really expected.
58° 16' N 20° 6' W Instrumented wave measurements Station ID D317/003 #1 (28/3/2007 09:27 - 11:20) Tethered buoy as above. Aerosol at 1m only
59° 45' N 22° 19' W Instrumented wave measurements Station ID D317/004 #1 (30/3/2007 09:00 - 10:10) Tethered buoy as above. Aerosol at 1m only. Buoy recovered early on request from bridge due to increasing waves
59° 13' N 22° 52' W Instrumented wave measurements Station ID D317/005 #1 (31/3/2007 09:17 - 11:20) Tethered buoy as above. Aerosol at 1m only.
58° 55' N 23° 27' W Instrumented wave measurements Station ID D317/006 #1 (01/04/2007 09:05 - 13:30) Tethered buoy as above. Aerosol at 1m only.
50° 37' N 22° 49' W Instrumented wave measurements Station ID D317/007 #1 (04/04/2007 13:20 - 16:30) Tethered buoy as above. Aerosol at 1m only.
50° 19' N 22° 46' W Instrumented wave measurements Station ID D317/008 #1 (05/04/2007 09:10 - 11:41) Tethered buoy as above. Aerosol at 1m only.
50° 13' N 26° 1' W Instrumented wave measurements Station ID D317/009 #1 (06/04/2007 10:15 - 15:00) Tethered buoy as above. Aerosol at 1m only.
59° 59' N 15° 12' W Other meteorological measurements Station D317/002 #1 (24/03/2007 09:15 - 13:15) Tethered buoy measuring: aerosol particles at 0.7 and 1.0 m above surface, bubble spectra at 0.42 m below surface, and wave heights via buoy motion pack. Buoy monitored by webcam - images recorded every second. ~4 hours data collected
56° 57' N 8° 16' W Other meteorological measurements Station ID D317/001 #1 (22/03/2007 09:30 - 13:00) Tethered buoy test deployment. All systems run, but whitecaps marginal, useful data not really expected.
58° 16' N 20° 6' W Other meteorological measurements Station ID D317/003 #1 (28/3/2007 09:27 - 11:20) Tethered buoy as above. Aerosol at 1m only
59° 45' N 22° 19' W Other meteorological measurements Station ID D317/004 #1 (30/3/2007 09:00 - 10:10) Tethered buoy as above. Aerosol at 1m only. Buoy recovered early on request from bridge due to increasing waves
59° 13' N 22° 52' W Other meteorological measurements Station ID D317/005 #1 (31/3/2007 09:17 - 11:20) Tethered buoy as above. Aerosol at 1m only.
58° 55' N 23° 27' W Other meteorological measurements Station ID D317/006 #1 (01/04/2007 09:05 - 13:30) Tethered buoy as above. Aerosol at 1m only.
50° 37' N 22° 49' W Other meteorological measurements Station ID D317/007 #1 (04/04/2007 13:20 - 16:30) Tethered buoy as above. Aerosol at 1m only.
50° 19' N 22° 46' W Other meteorological measurements Station ID D317/008 #1 (05/04/2007 09:10 - 11:41) Tethered buoy as above. Aerosol at 1m only.
50° 13' N 26° 1' W Other meteorological measurements Station ID D317/009 #1 (06/04/2007 10:15 - 15:00) Tethered buoy as above. Aerosol at 1m only.
59° 59' N 15° 12' W Other physical oceanographic measurements Station D317/002 #1 (24/03/2007 09:15 - 13:15) Tethered buoy measuring: aerosol particles at 0.7 and 1.0 m above surface, bubble spectra at 0.42 m below surface, and wave heights via buoy motion pack. Buoy monitored by webcam - images recorded every second. ~4 hours data collected
56° 57' N 8° 16' W Other physical oceanographic measurements Station ID D317/001 #1 (22/03/2007 09:30 - 13:00) Tethered buoy test deployment. All systems run, but whitecaps marginal, useful data not really expected.
58° 16' N 20° 6' W Other physical oceanographic measurements Station ID D317/003 #1 (28/3/2007 09:27 - 11:20) Tethered buoy as above. Aerosol at 1m only
59° 45' N 22° 19' W Other physical oceanographic measurements Station ID D317/004 #1 (30/3/2007 09:00 - 10:10) Tethered buoy as above. Aerosol at 1m only. Buoy recovered early on request from bridge due to increasing waves
59° 13' N 22° 52' W Other physical oceanographic measurements Station ID D317/005 #1 (31/3/2007 09:17 - 11:20) Tethered buoy as above. Aerosol at 1m only.
58° 55' N 23° 27' W Other physical oceanographic measurements Station ID D317/006 #1 (01/04/2007 09:05 - 13:30) Tethered buoy as above. Aerosol at 1m only.
50° 37' N 22° 49' W Other physical oceanographic measurements Station ID D317/007 #1 (04/04/2007 13:20 - 16:30) Tethered buoy as above. Aerosol at 1m only.
50° 19' N 22° 46' W Other physical oceanographic measurements Station ID D317/008 #1 (05/04/2007 09:10 - 11:41) Tethered buoy as above. Aerosol at 1m only.
50° 13' N 26° 1' W Other physical oceanographic measurements Station ID D317/009 #1 (06/04/2007 10:15 - 15:00) Tethered buoy as above. Aerosol at 1m only.

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
1 Meteorological data logger Air pressure
Air temperature
Atmospheric humidity
Date and time
Horizontal spatial co-ordinates
Solar Radiation
Visible waveband radiance and irradiance measurements in the atmosphere
Wind strength and direction
1 Pumped air sample Data are currently being processed
1 Single-beam echosounder Bathymetry and Elevation
Date and time
Horizontal platform movement
Horizontal spatial co-ordinates
Platform or instrument orientation
1 Thermosalinograph Date and time
Horizontal spatial co-ordinates
Metadata parameters
Raw fluorometer output
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column

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

Full List

BODC Reference Instrument Description Date/Time Location  
1043439 Pumped air sample 2007-03-21 00:00Z to 2007-04-10 04:44Z 42° 34' N to 60° 0' N; 26° 9' W to 4° 23' W Click for more
1097622 Single-beam echosounder 2007-03-21 11:41Z to 2007-04-12 09:01Z 38° 34' N to 60° 0' N; 26° 10' W to 4° 22' W Click for more
1097634 Meteorological data logger 2007-03-21 11:41Z to 2007-04-12 09:01Z 38° 34' N to 60° 0' N; 26° 10' W to 4° 22' W Click for more
1097646 Thermosalinograph 2007-03-21 11:41Z to 2007-04-12 09:01Z 38° 34' N to 60° 0' N; 26° 10' W to 4° 22' W Click for more

Project Database

# Events Gear Type Parameters Held
16 Sample taken from ship's non-toxic supply
Salinity of the water column

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

References

Track Charts

Track Chart

Reports

Cruise Report