Identification

Title

2001 - 2001 Centre for Environment, Fisheries & Aquaculture Science (Cefas) RV CIROLANA 01/2001 Low Resolution Conductivity-Temperature-Depth (CTD) Data

Abstract

The data in this archive was collected from CEFAS (Or DFR) research surveys. It broadly covers the European Shelf with some data from the Iberian Abyssal Plain. Data was collected using the lowered CTD rosette system which is used when the vessel is stationary. Usually bottles were fired at particular depths and samples taken for calibration. In early years only a limited set of parameters were collected. Notably Pressure (Depth), Temperature and Conductivity (CTD). From Conductivity Salinity can be calculated using the UNESCO 1978,1983 formulations . In subsequent years more sensors have been added, notably fluorometers, Optical back scatter or transmissometers and Light (PAR, photo synthetically available radiation). The exact configuration varies between cruises and this is reflected in the data format of the output files. Data was collected from research vessels on station, a profile from the surface to near the sea bed is undertaken. The down cast data should be a clean profile. Water bottles for sample collection and calibration are fired on the up cast.

Resource type

dataset

Resource locator

http://data.cefas.co.uk/#/View/887/

function: order

Unique resource identifier

code

CEFAS81b7c5cc-5464-4f3f-97e8-605e65e5deb5

codeSpace

http://www.cefas.co.uk/

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::4326

Classification of spatial data and services

Topic category

oceans

Keywords

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

SeaDataNet P021 parameter discovery vocabulary

reference date

date type

revision

effective date

2011-03-25

Keyword set

keyword value

originating controlled vocabulary

title

GEMET, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Geographic location

West bounding longitude

-2.5

East bounding longitude

6

North bounding latitude

57

South bounding latitude

50.5

Extent

Extent group

authority code

title

SeaVoX Vertical Co-ordinate Coverages

reference date

date type

revision

effective date

2010-05-18

code identifying the extent

Temporal reference

Temporal extent

Begin position

2001-01-05

End position

2001-01-13

Dataset reference date

date type

publication

effective date

2016-07-14

Frequency of update

notPlanned

Quality and validity

Lineage

Data was collected via the CTD rosette system using either a Guildine CTD or from approximately 1993 an Falmouth Scientific Instruments Integrated CTD. In addition to the CTD, additional instruments are Sea Point Fluorometers, Dr Haardt Fluorometers, Transmissometers, Sea Point Optical Backscatter, LICOR Light Sensors (PAR) Instruments were usually calibrated where possible before the cruise and post cruise, in a water bath, for Temperature and using a pressure test vessel for pressure. Calibrations for Salinity were performed with reference to Salinity samples collected. Calibration of the fluorescence to generate chlorophyll was by comparison to the collected samples. Similarly suspend load would be calibrated to samples collected and filtered. The light sensor was calibrated in a dark light box. The specific calibration values (where available) are stored with each cruise data set. Processing of the data was initially performed using the instrument specific programs to generate ASCII files (e.g FSIpost) a suite of programs developed at CEFAS was then used to generate calibrated files and generate the processed information. +------------+---------+--------------------------------+ |Pres |DBAR |Pressure in Dbar | +------------+---------+--------------------------------+ |Temp |Deg C |Temperature in Celsius | +------------+---------+--------------------------------+ |SALT | |Salinity (PSS 78) | +------------+---------+--------------------------------+ |PTEMP |Deg C |Potential Temperature | +------------+---------+--------------------------------+ |SNDVEL |m/sec |Sound Velocity | +------------+---------+--------------------------------+ |SIG-TH |KG/m3 |Density Sigma theta | +------------+---------+--------------------------------+ |SIGM |KG/m3 |Density Sigma T | +------------+---------+--------------------------------+ |SVAN |10*8 |Specific Volume Anomaly | +------------+---------+--------------------------------+ |DYNHT |m |Dynamic Height | +------------+---------+--------------------------------+ |BVF |CPH |Brunt Vaisala Frequency | +------------+---------+--------------------------------+ |Depth |m |Depth (integrated from density) | +------------+---------+--------------------------------+ |Transmission|raw | | | |volts | | +------------+---------+--------------------------------+ |Susp Load |mg/l |Calibrated transmission (or | | | |OBS) | +------------+---------+--------------------------------+ |RADI |lng A |raw light sensor | +------------+---------+--------------------------------+ |PAR |uE/M2/S |Calibrated light | +------------+---------+--------------------------------+ |Fluor |Volt |Uncalibrated fluorometer | +------------+---------+--------------------------------+ |Chl |mg/m3 |Calibrated fluorometer | +------------+---------+--------------------------------+

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Constraint set

Limitations on public access

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Responsible organisations

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2016-07-14T12:28:23

Metadata language

eng