Search the data

BODC Cruise Metadata Report for RRS James Clark Ross (74JC) cruise JR19990425 (AMT8, JR41, JR42)

Introduction

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

Cruise Inventory Information

Long name RRS James Clark Ross (74JC) cruise JR19990425 (AMT8, JR41, JR42)
Short name JR19990425 (AMT8, JR41, JR42)
Objectives and Narrative AMT 8: This cruise took place in two legs, April 25th - April 29th and May 18th -June 7th 1999. The Principal Scientist was Nigel Rees from PML. The AMT 8 cruise report is only available electronically and is an incomplete document (http://web.pml.ac.uk/amt/cruises/AMT8/amt8.html). There are no plans to produce a finished document.

JR42: The structure of the Earth's crust at oceanic volcanic islands is of interest for the information it provides both about the processes involved in the formation of these islands and about the rheology of the underlying oceanic lithosphere, which deforms in response to the island load. Since some of the acoustic energy from large underwater explosions is commonly coupled into the oceanic sound channel as so-called "T-phases", hydrophones around several such islands and broadband seismic stations on the islands are being used for monitoring of the Comprehensive Test Ban Treaty. Cruise JR42 involved a four-day seismic experiment around the island of Ascension, a 4-km-high volcano some 90 km west of the Mid-Atlantic Ridge. During the experiment, a 6186 cu. in. airgun array was fired at one-minute intervals for about two days along a series of lines extending up to 45 km from the coast of the island. These shots were received by hydrophones and sonobuoys offshore and seismometers onshore. The shots were used to locate and calibrate three permanently installed hydrophones, to study the coupling of seismic energy into the island slope, and to study the structure of the crust beneath the island. The experiment was funded by the US Department of Energy (through Lawrence Livermore National Laboratory (LLNL)), the US Office of Naval Research, the UK Natural Environment Research Council, the United Nations (through the Comprehensive Test Ban Treaty Office in Vienna), IFREMER's Centre de Brest, and funds held at the University of Southampton by T. A. Minshull.
Ship RRS James Clark Ross
Departure Port Stanley, Falkland Islands (Malvinas)
Departure Date 1999-04-25
Arrival Port Grimsby, United Kingdom
Arrival Date 1999-06-07
Principal Scientist(s) Nigel Rees (Plymouth Marine Laboratory), Tim A Minshull (University of Southampton School of Ocean and Earth Science)
Responsible Organisation Max Planck Institute for Marine Microbiology, OU-DEES
Associated Project(s) Atlantic Meridional Transect (AMT)
IHB Sea Areas Visited North Atlantic Ocean, South Atlantic Ocean
Marsden Squares Visited 110/111/145/146/181/2/216/301/337/338/374/375/39/412/413/449/485/75
Work Area Description
Work Area Bounding Polygon 60S,60W; 60N,60W; 60N,10E; 60S,10E; 60S,60W
Southern Limit 60S
Northern Limit 60N
Western Limit 60W
Eastern Limit 10E

Cruise Inventory Datasets

No information on datasets is currently available for this cruise

Cruise Inventory Mooring/Buoy Operations

No information on datasets is currently available

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
4 CTD/STD cast Density of the water column
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
28 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Raw fluorometer output
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column
5 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Raw fluorometer output
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
1 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Raw fluorometer output
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
1 Meteorological data logger Air pressure
Date and time
Horizontal spatial co-ordinates
Wind strength and direction
1 Multiple instrument types Chlorophyll pigment concentrations in water bodies
Date and time
Horizontal spatial co-ordinates
Raw fluorometer output
Salinity of the water column
Temperature of the water column
1 Single-beam echosounder Bathymetry and Elevation
Date and time
Horizontal spatial co-ordinates

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

Full List

BODC Reference Instrument Description Date/Time Location  
1073214 CTD/STD cast 1999-04-25 18:05Z 47° 36' S, 53° 57' W Click for more
1073226 CTD/STD cast 1999-04-26 00:46Z 46° 30' S, 53° 0' W Click for more
1073238 CTD/STD cast 1999-04-26 16:42Z 43° 30' S, 52° 59' W Click for more
1073251 CTD/STD cast 1999-04-26 23:14Z 42° 30' S, 53° 0' W Click for more
1073263 CTD/STD cast 1999-04-27 10:00Z 41° 12' S, 53° 0' W Click for more
1073275 CTD/STD cast 1999-04-27 15:37Z 40° 12' S, 53° 0' W Click for more
1073287 CTD/STD cast 1999-04-27 22:49Z 39° 0' S, 53° 0' W Click for more
1073299 CTD/STD cast 1999-04-28 10:05Z 38° 0' S, 53° 0' W Click for more
1073306 CTD/STD cast 1999-05-03 14:12Z 35° 4' S, 51° 40' W Click for more
1073318 CTD/STD cast 1999-05-05 17:09Z 30° 43' S, 42° 17' W Click for more
1073331 CTD/STD cast 1999-05-06 14:01Z 28° 51' S, 38° 19' W Click for more
1073343 CTD/STD cast 1999-05-07 13:04Z 26° 54' S, 34° 15' W Click for more
1073355 CTD/STD cast 1999-05-08 14:51Z 24° 33' S, 29° 33' W Click for more
1073367 CTD/STD cast 1999-05-09 13:50Z 22° 13' S, 25° 49' W Click for more
1073379 CTD/STD cast 1999-05-10 11:31Z 19° 12' S, 23° 13' W Click for more
1073380 CTD/STD cast 1999-05-10 14:04Z 18° 59' S, 23° 3' W Click for more
1073392 CTD/STD cast 1999-05-12 10:33Z 13° 10' S, 18° 7' W Click for more
1073411 CTD/STD cast 1999-05-13 10:33Z 9° 51' S, 15° 24' W Click for more
1073423 CTD/STD cast 1999-05-18 13:43Z 7° 37' S, 14° 30' W Click for more
1073435 CTD/STD cast 1999-05-20 10:38Z 0° 4' S, 16° 42' W Click for more
1073447 CTD/STD cast 1999-05-21 10:33Z 3° 54' N, 17° 52' W Click for more
1073459 CTD/STD cast 1999-05-22 10:34Z 7° 37' N, 18° 59' W Click for more
1073460 CTD/STD cast 1999-05-23 10:34Z 11° 33' N, 20° 9' W Click for more
1073472 CTD/STD cast 1999-05-24 10:42Z 15° 9' N, 21° 0' W Click for more
1073484 CTD/STD cast 1999-05-25 10:38Z 18° 48' N, 21° 0' W Click for more
1073496 CTD/STD cast 1999-05-26 10:37Z 22° 54' N, 21° 0' W Click for more
1073503 CTD/STD cast 1999-05-28 10:32Z 30° 28' N, 21° 33' W Click for more
1073515 CTD/STD cast 1999-05-29 10:33Z 34° 22' N, 20° 47' W Click for more
1073527 CTD/STD cast 1999-05-30 10:34Z 38° 10' N, 20° 1' W Click for more
1073539 CTD/STD cast 1999-05-31 10:36Z 42° 0' N, 20° 0' W Click for more
1073540 CTD/STD cast 1999-06-01 10:10Z 45° 56' N, 19° 58' W Click for more
1073552 CTD/STD cast 1999-06-01 18:01Z 47° 0' N, 20° 0' W Click for more
1073564 CTD/STD cast 1999-06-02 10:36Z 47° 27' N, 15° 39' W Click for more
1073576 CTD/STD cast 1999-06-03 10:42Z 48° 9' N, 9° 39' W Click for more
1073588 CTD/STD cast 1999-06-03 15:07Z 48° 15' N, 9° 14' W Click for more
1073607 CTD/STD cast 1999-06-04 10:45Z 48° 58' N, 9° 15' W Click for more
1073619 CTD/STD cast 1999-06-04 13:04Z 48° 58' N, 9° 10' W Click for more
1073620 CTD/STD cast 1999-06-05 09:42Z 49° 42' N, 4° 26' W Click for more
1222984 Single-beam echosounder 1999-04-24 18:25Z to 1999-06-07 08:02Z 51° 41' S to 53° 30' N; 57° 49' W to 0° 25' E Click for more
1222996 Meteorological data logger 1999-04-24 18:25Z to 1999-06-07 08:02Z 51° 41' S to 53° 30' N; 57° 49' W to 0° 25' E Click for more
1223011 Multiple instrument types 1999-04-24 18:25Z to 1999-06-07 08:02Z 51° 41' S to 53° 30' N; 57° 49' W to 0° 25' E Click for more

Project Database

# Events Gear Type Parameters Held
38 CTD frame plus rosette sampler Transmittance and attenuance of the water column
Density of the water column
Visible waveband radiance and irradiance measurements in the water column
Chlorophyll pigment concentrations in water bodies
Raw fluorometer output
Salinity of the water column
Temperature of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Raw light meter output
109 Expendable Bathythermograph
Temperature of the water column
324 Sample taken from ship's non-toxic supply Chlorophyll pigment concentrations in water bodies
Carotenoid and flavenoid pigment concentrations in water bodies

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

References

Track Charts

Track Chart

Reports

Cruise Report

Cruise Report