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Attention:

Please note that operations of the CTD (Conductivity-Temperature-Depth) watersampler requires experienced scientific staff on board. The system is not operated by the ship's crew. Announce operations with the CTD Watersampler to AWI-Logistics prior to the cruise and clarify the data transfer after the cruise.

Summary

The CTD probe measures conductivity and temperature along a vertical transect through the water body. The measured parameter are used to calculate the salinity of the water. Additionally, up to 24 water samples can be taken in different water depths during the CTD measurements.

Manufacturer Seabird
Model SBE911plus mit SBE32
Serial No. n/a
Type CTD
SENSOR-Link ↪

Contacts

Name Institution Role
Mario Hoppmann Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Engineer In Charge
Sandra Tippenhauer Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Engineer In Charge
Alfred Wegener Institute for Polar and Marine Research Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Owner

Components

The system consits of the CTD underwater unit (SBE9), the CTD shipboard equipment (SBE11), the watersampler carousel (SBE32) with 24 x 12 liter bottles (OTE) and the data acquisition computer with installed data acquisition software Seasave (V7.23.1) and data processing software SBE Data Processing (V7.22.5) and ManageCTD.
The CTD underwater unit is equipped with 2 temperature (SBE3plus) and 2 conductivity (SBE4C) sensors by default, which are calibrated on a regular basis. Several external sensors are available, which can be used in water depth up to 6000m: altimeter (Benthos PSA-916D), Fluorometer (Dr. Haardt or Wetlabs EcoFLR), Oxygen sensor (SBE43), Transmissiometer (Weblabs CStar 25cm), mechanical bottom detector.

Subdevices

Name Model Serial Number SENSOR-
Link
Altimeter Teledyne (Benthos) PSA-916 1228 ↪
Fl. Chla. Wetlabs FLRTD 1670 ↪
SBE32 Water sampling frame 657 ↪
SBE3plus temperature sensor SN 2417 SBE3plus n/a ↪
SBE3plus temperature sensor SN 2460 SBE3plus n/a ↪
SBE4 conductivity sensor SN 2054 SBE4 n/a ↪
SBE4 conductivity sensor SN 2055 SBE4 n/a ↪
SBE43 dissolved oxygen sensor SN 048 048 ↪
SBE43 dissolved oxygen sensor SN 743 743 ↪
SBE5 pump 1954 ↪
SBE5 pump 8791 ↪

Position

Infono xyz-position given, device stored on deck E and deployed when needed

Data logging, storage and archiving

Logged parameters

Parameter Sensor Output Type Unit
conductivity conductivity S/m
temperature water temperature °C
altimeter distance m
transmission visibility %
oxygen oxygen ml/l
pressure pressure dbar
fluorescence fluorescence V

Central geographical ship's position and time standard

Time synchronising of the computers is regulated via Windows Domain affiliation. UTC time is supplied via NMEA telegram and processed by Seasave software.
Geographical position is supplied via NMEA telegram and processed by Seasave software.

Rawdata storage on board

Mass data: The ManageCTD software produces data files in the mass storage.

root directory

\\polsrv1\data01\CTD

directory name

CruiseNo
e.g.
ANT-XXVI-1

file name

several files in the following subdirectories:
btl
conf1
dsp
final
mat
odv
work

Data volume (MB per day) ca

50

Number of files per day ca

10

Data archiving on land

After the cruise, the operator transfers the measurement data along with required meta data to AWI after consultaion with the data scientist and AWI Logistics. Then, the data (including meta data) can be made available on https://www.pangaea.de/ (for authorized users only).

File format(s)

raw data: *.hex, *.bl, *.hdr, *.xmlcon; processed data: *.txt

Calibration certificates

YES

Location of certificates

PI (calibration data is stored in *.xmlcon file)

Documentation



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