CEFASb73d9181-d95c-4247-be58-34e596714d12
English
dataset
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
pointOfContact
2016-07-14T12:28:23
MEDIN Discovery Metadata Standard
Version 2.3.7
urn:ogc:def:crs:EPSG::4326
OGP
2004 - 2004 Centre for Environment, Fisheries & Aquaculture Science (Cefas) RV CORYSTES 15/2004 Low Resolution Conductivity-Temperature-Depth (CTD) Data
2016-07-14
publication
CEFASb73d9181-d95c-4247-be58-34e596714d12
http://www.cefas.co.uk/
The data in this archive were collected from CEFAS (Or DFR) research cruises.
They broadly cover the European Shelf with some data from the Iberian Abysal
Plain. Data were 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.
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
originator
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
custodian
notPlanned
NDGO0005
Currents
Horizontal velocity of the water column (currents)
Raw current meter output parameters
Raw temperature and/or salinity instrument output
Salinity of the water column
Temperature of the water column
Water column temperature and salinity
SeaDataNet P021 parameter discovery vocabulary
2011-03-25
revision
Remote Sensing
Advice
Analysis
Management
Monitoring
GEMET, version 1.0
2008-06-01
publication
Oceanographic geographical features
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
otherRestrictions
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
English
oceans
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
revision
Water column
0
3
51
52.5
2004-10-13
2004-10-15
http://data.cefas.co.uk/#/View/764/order
dataset
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 |
+------------+---------+--------------------------------+