Metadata Report for BODC Series Reference Number 1224376

• 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

Problem Reports

No Problem Report Found in the Database

Data Access Policy

Open 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.

If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:

"Contains public sector information licensed under the Open Government Licence v1.0."

Narrative Documents

Instrument Description

A Sea and Sun Technology MSS 90L Microstructure Profiler equipped with two velocity microstructure shear sensors, a microstructure temperature sensor, standard CTD sensors for precision measurements, a turbidity (light scattering) sensor, a vibration control sensor, and a two component tilt sensor was used for all casts. All sensors were mounted at the measuring head of the profiler (sensor end). The microstructure sensors were placed at the tip of a slim shaft, about 150 mm in front of the CTD sensors.

Calibration of the shear sensors was performed by ISW Wassermesstechnik using a special shear probe calibration system. The probe rotates about its axis of symmetry at 1Hz under an angle of attack in a water jet of constant velocity. At different angles of attack the rms voltage output of the probe is measured. The probe sensitivity is the slope of the regression (best fit of a cubic approximation) of the sensor output versus the angle of attack. The calibration constants for the shear sensors used during cruise are given in the table below. The calibration of the CTD sensors was to be carried out by Sea and Sun Technology GmbH using standard calibration equipment and procedures for CTD probes post cruise. The vibration control sensor and the tilt sensors were calibrated by ISW Wassermesstechnik using special calibration equipment for both sensors.

Calibration constants for velocity microstructure shear sensors

Microstructure Profiler MSS 90 and Sensors