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
- A summary of BODC data holdings for the cruise from the
- References - including cruise tracks and cruise reports
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 | Plymouth Marine Laboratory, Southampton Oceanography Centre |
| 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 | |
| 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
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
Carotenoid and flavenoid pigment concentrations in water bodies Temperature of the water column Salinity of the water column Visible waveband radiance and irradiance measurements in the water column Density of the water column Raw light meter output Raw fluorometer output Chlorophyll pigment concentrations in water bodies |
| 324 | Sample taken from ship's non-toxic supply |
Carotenoid and flavenoid pigment concentrations in water bodies
Chlorophyll pigment concentrations in water bodies |
| 109 | Expendable Bathythermograph |
Temperature of the water column
|
Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)