RRS James Clark Ross JR19950921 (AMT1, JRXX1)

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS James Clark Ross (74JC)

Cruise identifier

JR19950921 (AMT1, JRXX1)

Cruise period

1995-09-21 — 1995-10-24

Status

Completed

Port of departure

Grimsby, United Kingdom

Port of return

Stanley, Falkland Islands (Malvinas)

Purpose

Research

Objectives

Atlantic Meridional Transect (AMT)

The primary objective of the AMT programme is to investigate basic biological processes in the open Atlantic Ocean over very broad spatial scales. For AMT-1, the meridional range covered was approximately 50° N to 50° S or nearly 8000 nmi. The measurements to be taken during the AMT cruises are fundamental for the calibration, validation, and continuing understanding of remotely sensed observations of biological oceanography. They are also important for understanding plankton community structure over latitudinal scales and the role of the world ocean in global carbon cycles. During AMT-1 a variety of instruments were used to map the physical, chemical, and biological structure of the upper 200m of the water column. Ocean colour measurements, photosynthetic activity and primary productivity, samples and data for planktonic assemblages, pCO2 and light attenuation were also measured. The AMT programme is also attempting to meet the needs of international agencies in their implementation of Sensor Intercomparison and Merger for Biological and Interdisciplinary Ocean Studies (SIMBOS), a programme to develop a methodology and operational capability to combine data products from the various ocean colour satellite missions. The AMT programme also forms a significant component of two NERC Special Topic PRIME projects, P19 and P20.

Objectives:
1. Acquire data for the calibration of remotely sensed observations (primary validation)
2. Secondary validation of remotely sensed products (e.g., chlorophyll concentration)
3. Develop models that enable the interpretation of satellite imagery in terms of total water column properties
4. Interpret basin-scale remote sensing observations
5. Understand further the interaction between physica processes and biological production
6. Identify and quantify latitudinal changes in biogeochemical provinces
7. Determine phytoplankton characteristics and photosynthetic parameters
8. Relate the partial pressure of CO2 (pCO2) in surface waters with the biological production
9. Identify nutrient regimes
10. Characterise plankton community structure, including the accurate determination of carbon values in accordance with Joint Global Ocean Flux Study (JGOFS) protocols

Chief scientist

David Robins (Plymouth Marine Laboratory)

Project

AMT

Cruise report

(4.18 MB)

Ocean/sea areas

General

North Atlantic Ocean
South Atlantic Ocean

Track charts

(0.07 MB)

Measurements

Physical oceanography

Bathythermograph

Quantity: number of deployments = 87
Description: XBT were deployed at a number of locations.

Water bottle stations

Quantity: number of stations = 25
Description: CTD bottle rosette readings were recorded. Depth range 7-200m.

CTD stations

Quantity: number of stations = 25
Description: CTD bottle rosette readings were recorded. Depth range 7-200m.

Contamination

Suspended matter

Quantity: number of measurements = 25
Description: Particulate carbon log. Depth Range 7-160m.

Biology and fisheries

Zooplankton

Quantity: number of measurements = 25
Description: Zooplankton carbon log. Depth range 98-205m.

Data held at BODC

Get data

Series/Profiles

50 Bottle station

Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Quality control flags

[Show series]

[Hide series]

BODC id	Date/Time	Location
1632111	1995-09-30 13:37	33° 35' 49" N 20° 52' 39" W
1632147	1995-10-04 11:36	19° 29' 59" N 20° 23' 39" W
1632227	1995-10-12 15:37	15° 34' 49" S 33° 26' 58" W
1632307	1995-10-23 16:35	46° 0' 28" S 56° 17' 1" W
1093203	1995-10-24 14:27	50° 48' 29" S 57° 25' 10" W
1093320	1995-10-07 14:31	5° 21' 23" N 23° 57' 59" W
1093332	1995-10-08 14:29	1° 23' 32" N 25° 42' 4" W
1093393	1995-10-15 15:31	27° 7' 2" S 40° 8' 16" W
1632252	1995-10-15 15:31	27° 7' 2" S 40° 8' 16" W
1093264	1995-09-29 13:37	37° 54' 38" N 19° 59' 25" W
1632055	1995-09-25 12:57	48° 55' 52" N 9° 8' 45" W
1632276	1995-10-17 15:36	33° 10' 48" S 46° 24' 55" W
1093240	1995-09-27 11:14	47° 0' 47" N 19° 59' 5" W
1093252	1995-09-28 13:53	42° 15' 16" N 20° 1' 52" W
1093276	1995-10-02 14:47	27° 22' 24" N 21° 49' 52" W
1093344	1995-10-09 14:31	2° 47' 24" S 27° 31' 37" W
1093356	1995-10-11 15:43	11° 28' 10" S 31° 33' 16" W
1093400	1995-10-16 15:31	30° 17' 24" S 43° 23' 22" W
1093424	1995-10-23 16:35	46° 0' 28" S 56° 17' 1" W
1632067	1995-09-26 12:51	47° 55' 18" N 14° 51' 10" W
1632079	1995-09-27 11:14	47° 0' 47" N 19° 59' 5" W
1632215	1995-10-11 15:43	11° 28' 10" S 31° 33' 16" W
1093215	1995-09-30 13:37	33° 35' 49" N 20° 52' 39" W
1093288	1995-10-04 11:36	19° 29' 59" N 20° 23' 39" W
1093319	1995-10-06 14:34	9° 14' 17" N 22° 12' 54" W
1093381	1995-10-13 15:38	19° 38' 40" S 35° 21' 42" W
1632080	1995-09-28 13:53	42° 15' 16" N 20° 1' 52" W
1632159	1995-10-05 16:38	13° 2' 31" N 20° 26' 10" W
1632264	1995-10-16 15:31	30° 17' 24" S 43° 23' 22" W
1093307	1995-10-05 16:38	13° 2' 31" N 20° 26' 10" W
1093436	1995-10-03 13:29	23° 16' 59" N 21° 9' 48" W
1632123	1995-10-02 14:47	27° 22' 24" N 21° 49' 52" W
1632160	1995-10-06 14:34	9° 14' 17" N 22° 12' 54" W
1632196	1995-10-09 14:31	2° 47' 24" S 27° 31' 37" W
1632203	1995-10-10 14:33	7° 0' 47" S 29° 30' 40" W
1632288	1995-10-22 17:50	40° 57' 4" S 55° 15' 35" W
1093184	1995-10-10 14:33	7° 0' 47" S 29° 30' 40" W
1093196	1995-10-22 17:50	40° 57' 4" S 55° 15' 35" W
1093227	1995-09-25 12:57	48° 55' 52" N 9° 8' 45" W
1632092	1995-09-29 13:37	37° 54' 38" N 19° 59' 25" W
1632135	1995-10-03 13:29	23° 16' 59" N 21° 9' 48" W
1632184	1995-10-08 14:29	1° 23' 32" N 25° 42' 4" W
1632239	1995-10-13 15:38	19° 38' 40" S 35° 21' 42" W
1093239	1995-09-26 12:51	47° 55' 18" N 14° 51' 10" W
1093368	1995-10-12 15:37	15° 34' 49" S 33° 26' 58" W
1093412	1995-10-17 15:36	33° 10' 48" S 46° 24' 55" W
1093448	1995-10-14 15:36	23° 47' 25" S 37° 23' 15" W
1632172	1995-10-07 14:31	5° 21' 23" N 23° 57' 59" W
1632240	1995-10-14 15:36	23° 47' 25" S 37° 23' 15" W
1632319	1995-10-24 14:27	50° 48' 29" S 57° 25' 10" W

24 CTD/STD cast

Temperature of the water column
Vertical spatial coordinates
Salinity of the water column
Density of the water column

[Show series]

Temperature of the water column
Vertical spatial coordinates
Salinity of the water column
Density of the water column

[Hide series]

BODC id	Date/Time	Location
1056561	1995-10-03 13:16	23° 16' 58" N 21° 9' 48" W
1056573	1995-10-04 11:24	19° 29' 58" N 20° 23' 39" W
1056665	1995-10-13 15:26	19° 38' 40" S 35° 21' 42" W
1056708	1995-10-17 15:24	33° 10' 48" S 46° 24' 55" W
1056721	1995-10-22 17:39	40° 57' 4" S 55° 15' 35" W
1056548	1995-10-02 14:34	27° 22' 24" N 21° 49' 52" W
1056585	1995-10-05 16:24	13° 2' 31" N 20° 26' 10" W
1056628	1995-10-09 14:18	2° 47' 24" S 27° 31' 37" W
1056493	1995-09-26 12:38	47° 55' 18" N 14° 51' 10" W
1056524	1995-09-29 13:24	37° 54' 38" N 19° 59' 25" W
1056653	1995-10-12 15:25	15° 34' 49" S 33° 26' 58" W
1056597	1995-10-06 14:22	9° 14' 17" N 22° 12' 53" W
1056512	1995-09-28 13:40	42° 15' 16" N 20° 1' 52" W
1056536	1995-09-30 13:25	33° 35' 49" N 20° 52' 40" W
1056604	1995-10-07 14:18	5° 21' 22" N 23° 57' 59" W
1056616	1995-10-08 14:18	1° 23' 32" N 25° 42' 4" W
1056733	1995-10-23 16:23	46° 0' 28" S 56° 17' 1" W
1056641	1995-10-11 15:35	11° 28' 10" S 31° 33' 16" W
1056689	1995-10-15 15:20	27° 7' 2" S 40° 8' 16" W
1056690	1995-10-16 15:20	30° 17' 24" S 43° 23' 22" W
1056500	1995-09-27 11:01	47° 0' 47" N 19° 59' 5" W
1056677	1995-10-14 15:24	23° 47' 25" S 37° 23' 16" W
1056745	1995-10-24 14:18	50° 48' 29" S 57° 25' 10" W
1056481	1995-09-25 12:47	48° 55' 52" N 9° 8' 45" W

1 Meteorological data logger

Horizontal spatial co-ordinates
Air pressure
Visible waveband radiance and irradiance measurements in the atmosphere
Date and time
Air temperature
Wind strength and direction
Solar Radiation

[Show series]

Horizontal spatial co-ordinates
Air pressure
Visible waveband radiance and irradiance measurements in the atmosphere
Date and time
Air temperature
Wind strength and direction
Solar Radiation

[Hide series]

BODC id	Date/Time	Location	Doc.
1222738	1995-09-21 12:05:30 — 1995-10-24 23:59:30	53° 34' 41" N 0° 4' 22" W — 51° 54' 12" S 58° 29' 20" W

1 Multiple instrument types

Horizontal spatial co-ordinates
Date and time
Salinity of the water column
Temperature of the water column
Raw fluorometer output
Chlorophyll pigment concentrations in water bodies

[Show series]

Horizontal spatial co-ordinates
Date and time
Salinity of the water column
Temperature of the water column
Raw fluorometer output
Chlorophyll pigment concentrations in water bodies

[Hide series]

BODC id	Date/Time	Location	Doc.
1222763	1995-09-21 12:05:30 — 1995-10-24 23:59:30	53° 34' 41" N 0° 4' 22" W — 51° 54' 12" S 58° 29' 20" W

1 Pumped water sample

Horizontal spatial co-ordinates
Date and time
Phaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies

[Show series]

Horizontal spatial co-ordinates
Date and time
Phaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies

[Hide series]

BODC id	Date/Time	Location	Doc.
1665128	1995-09-24 17:00 — 1995-10-24 18:25	51° 37' 56" S 57° 36' 9" W — 50° 9' 24" N 3° 35' 58" W

1 Single-beam echosounder

Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation

[Show series]

Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation

[Hide series]

BODC id	Date/Time	Location	Doc.
1222751	1995-09-21 12:05:30 — 1995-10-24 23:59:30	53° 34' 41" N 0° 4' 22" W — 51° 54' 12" S 58° 29' 20" W

Discrete samples

25 CTD frame plus rosette sampler

Reference numbers
Carotenoid and flavenoid pigment concentrations in water bodies
Particulate total and organic nitrogen concentrations in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Phytoplankton taxonomic abundance in water bodies
Silicate concentration parameters in the water column
Phytoplankton generic abundance in water bodies
Density of the water column
Bacteria taxonomic abundance in water bodies
Microzooplankton taxonomic abundance in water bodies
Phaeopigment concentrations in the water column
Metadata parameters
Nitrate concentration parameters in the water column
Primary production in the water column
Particulate total and organic carbon concentrations in the water column
Chlorophyll pigment concentrations in water bodies

86 Expendable Bathythermograph

Temperature of the water column

421 Sample taken from ship's non-toxic supply

Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Phaeopigment concentrations in the water column
Nitrate concentration parameters in the water column
Chlorophyll pigment concentrations in water bodies

25 WP-2 zooplankton net

Zooplankton taxonomy-related abundance per unit volume of the water column
Zooplankton non taxonomy-related abundance per unit volume of the water column
Fish abundance in water bodies

Resources

RRS James Clark Ross JR19950921 (AMT1, JRXX1)

Cruise summary report

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