Metadata Report for BODC Series Reference Number 561337
Metadata Summary
Problem Reports
Data Access Policy
Narrative Documents
Project Information
Data Activity or Cruise Information
Fixed Station Information
BODC Quality Flags
SeaDataNet Quality Flags
Metadata Summary
Data Description |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Data Identifiers |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Time Co-ordinates(UT) |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Spatial Co-ordinates | |||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Parameters |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
|
Problem Reports
No Problem Report Found in the Database
Data Access Policy
Public domain data
These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.
The recommended acknowledgment is
"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."
Narrative Documents
Sea-Bird SBE 25 SEALOGGER CTD
The SBE 25 SEALOGGER is a research-quality CTD profiling system used for coastal, estuarine and, can also be a practical option, for deep-water work. It is easily configured in the field for a wide range of auxiliary sensors. The SEALOGGER is self-powered, requires no conductive cable, and is designed for use up to 6800 meters (10,000 psia). It uses the SBE3F temperature and SBE4 conductivity sensors as well as having an external strain gauge pressure sensor. It provides pump-controlled T-C ducted flow, samples at 8 Hz, records internally and provides simultaneous real-time data via its built-in RS-232 interface.
The standard CTD unit comes with a plastic housing (rated to 600 m), although this can be replaced by aluminium housing for depths up to 6800 m.
Specifications
Parameter | SBE 25 |
---|---|
Temperature | Range: -5 to +35 °C Accuracy: 0.002 °C Resolution: 0.0003 °C |
Conductivity | Range: 0 to 7 S m-1 (0 to 70 mmho cm-1) Accuracy: 0.0003 S m-1 Resolution: 0.00004 S m-1 |
Strain gauge pressure sensor | Range: 0 to 20, 100, 350, 600, 1000, 2000, 3500, 7000 metres (expressed in metres of deployment depth capability) Accuracy: 0.1% of full scale range Resolution: 0.015% of full scale range |
Options and accessories
Additional sensors can be attached to the CTD, including:
- Dissolved Oxygen (SBE 43 DO Sensor)
- pH (SBE 18 pH Sensor or SBE 27 pH/ORP Sensor)
- fluorescence
- radiance (PAR)
- light transmission
- optical backscatter (turbidity)
The SBE 5T titanium pump can be used in place of SBE 5P pump. Further details can be found in the manufacturer's SBE 25 instrument specification.
RV Scotia 16/2000 CTD Data Documentation
Introduction
Documentation for data collected on R.V. Scotia cruise 16/2000 (5 October - 19 October 2000) by Fisheries Research Services, Aberdeen, UK.
Instrumentation and Protocols
For leg A the temperature and salinity data were collected using a SeaBird SBE25 (Sealogger) instrument which was calibrated using bottle samples and thermometer readings to produce the following equations:
T(cal) = T(obs)
C(cal) = 1.000362C(obs) - 0.012190
For leg B the temperature and salinity data were collected using a SeaBird SBE9/11+ instrument which was calibrated using bottle samples and thermometer readings to produce the following equations:
T(cal) = T(obs)
C(cal) = 0.999804C(obs) + 0.010607
For further information contact:
George Slesser
Ocean Climate Group
FRS, Marine Laboratory Aberdeen
PO Box 101
Victoria Road
Aberdeen AB11 9DB
G.Slesser@marlab.ac.uk
Project Information
Monitoring the Atlantic Inflow toward the Arctic (MAIA)
Introduction
MAIA is an EU Fifth Framework Programme supporting Key Action 2 (Global Change, Climate and Biodiversity) of Theme 4: Energy, Environment and Sustainable Development. The overall objective of MAIA is to develop an inexpensive and reliable system based on coastal sea level data for monitoring the inflows of Atlantic water into the northern seas.
Scientific Rationale
The flux of Atlantic Water to the northern seas is vital for the existence of life in northern Europe. More than half of the Atlantic Water appears to enter the Norwegian Sea to the west of the Faroe Islands. A lesser, warmer amount enters along the continental margin past Scotland. There have been several attempts to estimate and monitor these fluxes and see how the ice extent in the north is correlated to them.
The special goals of MAIA are:
-
to monitor the inflow of salt and heat to the northern seas for the analysis of climate variability, distinguishing between warmer (eastern) and cooler (western) inflow past the Faroes, and the major routes through the Barents Sea, with a time resolution better than a week, a spatial resolution of the major routes and an accuracy better than 15%.
-
to understand the causes of errors and recommend strategies to improve the future accuracy of such a monitoring tool.
Project Components
The project was divided into 3 phases:
-
Phase I
Phase I was to analyse historical observations of sea-level fluctuations during the past decade and compare them with available bottom pressure and in situ current velocity measurements in the region of interest.
-
Phase II
Phase II is a dedicated validation study in the Shetland- Iceland region and in the Barents Sea to verify that the system can give the required results to the desired accuracy and resolution. The validation period was from summer 2000 to November 2001.
-
Phase III
Phase III of the project includes evaluating the validations, the effects of external influences and the ice studies, and making recommendations for future monitoring.
Data Activity or Cruise Information
Cruise
Cruise Name | 1600S |
Departure Date | 2000-10-05 |
Arrival Date | 2000-10-19 |
Principal Scientist(s) | George Slesser (Fisheries Research Services Aberdeen Marine Laboratory) |
Ship | FRV Scotia |
Complete Cruise Metadata Report is available here
Fixed Station Information
No Fixed Station Information held for the Series
BODC Quality Control Flags
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
Flag | Description |
---|---|
Blank | Unqualified |
< | Below detection limit |
> | In excess of quoted value |
A | Taxonomic flag for affinis (aff.) |
B | Beginning of CTD Down/Up Cast |
C | Taxonomic flag for confer (cf.) |
D | Thermometric depth |
E | End of CTD Down/Up Cast |
G | Non-taxonomic biological characteristic uncertainty |
H | Extrapolated value |
I | Taxonomic flag for single species (sp.) |
K | Improbable value - unknown quality control source |
L | Improbable value - originator's quality control |
M | Improbable value - BODC quality control |
N | Null value |
O | Improbable value - user quality control |
P | Trace/calm |
Q | Indeterminate |
R | Replacement value |
S | Estimated value |
T | Interpolated value |
U | Uncalibrated |
W | Control value |
X | Excessive difference |
SeaDataNet Quality Control Flags
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
Flag | Description |
---|---|
0 | no quality control |
1 | good value |
2 | probably good value |
3 | probably bad value |
4 | bad value |
5 | changed value |
6 | value below detection |
7 | value in excess |
8 | interpolated value |
9 | missing value |
A | value phenomenon uncertain |
B | nominal value |
Q | value below limit of quantification |