MIRAI MR08-05 Conductivity-Temperature-Depth Profiler (CTD)

Last Modified: 2017-06-22
: MR08-05
: Processed (DMO)-QCed
: Pressure, Temperature, Salinity, Dissolved oxygen
:
OCEANS > OCEAN CHEMISTRY > OXYGEN
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > SALINITY

For Using Data

Data Management Office
See Terms and Conditions about constrain of use.
See Terms and Conditions about data citation.
Instrument:
Water sampling system with CTD (30 litters * 24 bottles)
Instrument:
Water sampling system with CTD (12 litters * 36 bottles)
Instrument:
Water sampling system with CTD (12 litters * 12 bottles)
Instrument:
Conductivity temperature depth measurements (CTD)
CTD(Conductivity-Temperature-Depth profiler) is used to observe the vertical profiles of temperature and conductivity.
Usually, this system is operated with multicylinder water sampler.
Observed signal is transmitted from sensor to the operation room on board using wire cable, and electric power is supplied from vessel to sensor.
Details of sensors attached to CTD system for MR08-05 cruise are presented in “System”.
The following software, developed and supplied by the Sea-Bird Electronics, Inc., was used in MR08-05.
SEASAVE(ver 5.27b) for data acquisition
SEASOFT(ver 5.27b) for data processing
Data presented on this website is averaged over 1db.

• Pressure sensor
Model : SBE9plus, Sea-Bird Electronics,Inc.
Serial number : 79492
Measurement range : up to 10500m
Accuracy : 0.015% F.S.
Resolution : 0.001% F.S.
• Pressure sensor
Model : SBE9plus, Sea-Bird Electronics,Inc.
Serial number : 79511
Measurement range : up to 10500m
Accuracy : 0.015% F.S.
Resolution : 0.001% F.S.
• Temperature sensor
Model : SBE3, Sea-Bird Electronics,Inc.
Serial number : 031464
Measurement range : -5.0 to +35degC
Accuracy : 0.001degC
Resolution : 0.0002degC
• Salinity sensor
Model : SBE4, Sea-Bird Electronics,Inc.
Serial number : 042435
Measurement range : 0.0 to 7 S/m
Accuracy : 0.0003 S/m
Resolution : 0.00004 S/m
• Salinity sensor
Model : SBE4, Sea-Bird Electronics,Inc.
Serial number : 043036
Measurement range : 0.0 to 7 S/m
Accuracy : 0.0003 S/m
Resolution : 0.00004 S/m
• Salinity sensor
Model : SBE4, Sea-Bird Electronics,Inc.
Serial number : 042854
Measurement range : 0.0 to 7 S/m
Accuracy : 0.0003 S/m
Resolution : 0.00004 S/m
• DO sensor
Model : SBE43, Sea-Bird Electronics,Inc.
Serial number : 430330
Measurement range : 120% of surface saturation
Accuracy : 2% of saturation

Sensors used in each cast is as follows.
Cast name Serial number of sensor
Pressure Temperature Salinity Dissolved Oxygen
S01M01 79492 031464 042435 430330
S01M02 79492 031464 042435 430330
S01M03 79492 031464 042435 430330
S01M04 79492 031464 042435 430330
S01M05 79492 031464 042435 430330
S01M06 79492 031464 042435 430330
S02M01 79492 031464 042435 430330
S03M01 79492 031464 042435 430330
S04M03 79511 031464 042435 430330
S05M01 79511 031464 042435 430330
S06M01 79511 031464 042435 430330
S07M01 79511 031464 042435 430330
S07M02 79511 031464 042435 430330
S07M03 79511 031464 042435 430330
S07M04 79511 031464 042435 430330
S07M05 79511 031464 043036 430330
S07M06 79492 031464 042854 430330
S08M01 79492 031464 042854 430330
S09M01 79492 031464 042854 430330
S10M01 79492 031464 042854 430330
S11M01 79492 031464 042854 430330
S11M02 79492 031464 042854 430330
S11M03 79492 031464 042854 430330
S11M04 79492 031464 042854 430330
S11M05 79492 031464 042854 430330
S11M06 79492 031464 042854 430330
S11M07 79492 031464 042854 430330
S11M08 79492 031464 042854 430330
S11M09 79492 031464 042854 430330
S11M10 79492 031464 042854 430330
S12M01 79492 031464 042854 430330
S13M01 79492 031464 042854 430330
S14M01 79492 031464 042854 430330
S14M02 79492 031464 042854 430330
S14M03 79492 031464 042854 430330
S15M01 79492 031464 042854 430330
S15M02 79492 031464 042854 430330
Calibration Information is as follows.
(1) Data processing sequence for SEASOFT is as follows;
("∗" is not SEASOFT original procedure.)
command function
datcnv Convert raw data to engineering units, and store converted data in file.
tcorp Corrected the pressure sensitivity of the temperature(SBE3) sensor.
alignctd Align data relative to pressure(typically used for conductivity, temperature, and oxygen).
wildedit Mark a data value with badflag to eliminate wild points.
celltm Perform conductivity thermal mass correction.
filter Low-pass filter columns of data.
wfilter Median filter removes spikes of fluorometer data.
section Extract rows of data from file.
loopedit Mark a scan with badflag if scan fails pressure reversal or minimum velocity tests.
despike Remove spikes of the data.
derive Calculate oxygen. (with oxygen sensor)
binavg Average data, basing bins on pressure, depth, scan number, or time range.
derive Calculate salinity, density, etc..
split Split data in file into upcast and downcast files.
(2) Quality control
QCed data were added flag according to the NODC (National Oceanographic Data Center) quality control procedure.
1) The gradient check of adjacent depth data
2) The density inversion check
3) The broad range check set up at given ocean space and depth
Please see the site of NODC of the following link for quality control procedure in detail.
In addition, an abnormal value is identified by a visual check, and the data after visual QC is released.
(1) In this cruise, there is extra data (fluorescence intensity, transmittance, distance to bottom) in additional to temperature, salinity, dissolved oxygen that has been opened to the public. Please contact us from "Contact Us" above if necessary.
: MR08-05
: Processed (DMO)-QCed
: Pressure, Temperature, Salinity, Dissolved oxygen
:
OCEANS > OCEAN CHEMISTRY > OXYGEN
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > SALINITY

Observation Map

  1. Clicking the icon displays a balloon with observation information.
  2. Then click the observation name, figures will be displayed.
Imagery reproduced from ...

Figures

Data List

File names
S01M01.dat
S01M02.dat
S01M03.dat
S01M04.dat
S01M05.dat
S01M06.dat
S02M01.dat
S03M01.dat
S04M03.dat
S05M01.dat
S06M01.dat
S07M01.dat
S07M02.dat
S07M03.dat
S07M04.dat
S07M05.dat
S07M06.dat
S08M01.dat
S09M01.dat
S10M01.dat
S11M01.dat
S11M02.dat
S11M03.dat
S11M04.dat
S11M05.dat
S11M06.dat
S11M07.dat
S11M08.dat
S11M09.dat
S11M10.dat
S12M01.dat
S13M01.dat
S14M01.dat
S14M02.dat
S14M03.dat
S15M01.dat
S15M02.dat
ex_read2.f (Sample Program)
Observation List
The list of observation is shown as follows.
Observation Time and Date Lat. [°] Lon. [°]
S01M01 2008-10-14 16:55 56.9978 176.0043
S01M02 2008-10-14 22:46 56.9995 175.9886
S01M03 2008-10-15 00:29 57.0003 175.9965
S01M04 2008-10-15 05:07 57.0381 175.9898
S01M05 2008-10-15 06:54 56.9998 176.0056
S01M06 2008-10-15 17:19 57.0055 176.0020
S02M01 2008-10-16 16:52 56.0006 174.6693
S03M01 2008-10-17 00:55 55.0155 173.3574
S04M03 2008-10-17 21:14 53.9981 171.9988
S05M01 2008-10-18 05:21 53.0015 170.6688
S06M01 2008-10-18 12:03 52.0043 169.3400
S07M01 2008-10-19 05:16 51.0000 165.0011
S07M02 2008-10-19 17:23 51.0003 165.0000
S07M03 2008-10-19 21:01 51.0316 165.0041
S07M04 2008-10-20 02:03 50.9970 165.0505
S07M05 2008-10-20 07:57 50.9880 165.0650
S07M06 2008-10-20 22:27 51.0478 165.2889
S08M01 2008-10-21 14:33 50.0011 163.7491
S09M01 2008-10-22 00:09 49.0058 162.5070
S10M01 2008-10-22 09:50 48.0020 161.2520
S11M01 2008-10-23 22:00 46.9975 160.0016
S11M02 2008-10-24 04:10 46.9923 160.0040
S11M03 2008-10-24 08:30 46.9998 160.0026
S11M04 2008-10-25 01:58 47.0126 159.9928
S11M05 2008-10-26 04:58 46.9991 159.9983
S11M06 2008-10-26 06:25 47.0021 160.0173
S11M07 2008-10-26 18:21 47.0023 160.0073
S11M08 2008-10-26 20:55 46.9991 160.0003
S11M09 2008-10-27 20:55 46.9965 160.0165
S11M10 2008-10-28 03:22 46.9988 159.9298
S12M01 2008-10-29 19:58 46.0096 158.3551
S13M01 2008-10-30 06:36 44.9996 156.6681
S14M01 2008-10-30 22:44 44.0010 154.9961
S14M02 2008-10-31 00:48 44.0158 154.9836
S14M03 2008-10-31 03:31 44.0396 154.9975
S15M01 2008-11-02 21:12 41.1173 142.1361
S15M02 2008-11-03 00:03 41.1140 142.1328
: MR08-05
: Processed (DMO)-QCed

CTD DMO


Format Description for the Corrected Data
Provided in the Exchange Format of CCHDO (CLIVAR and Carbon Hydrographic Data Office). Please see the following link for details of Exchange Format.
Data in following cruise is not expressed with Exchange Format. Please see the site of each cruise for format.
MR02-K05 Leg1
MR04-05
Format Description for the QCed Data
Each data file contains one line header (meta data) followed by data lines for each cast.
The number of data lines are recorded in the header.
  1. Header part
No. Column Content Format Remarks
1 1 Header ID a1 fixed as '#'
2 3 - 6 Data ID a4 CTD
3 8 - 22 Cruise ID a15 MRYY-(K)XX(_legx)
4 24 - 31 Cast name a8
5 33 - 40 Date i8 YYYYMMDD (UTC)
6 42 - 45 Time i4 hhmm (UTC)
7 47 - 55 Latitude i2,a1,f5.2,a1 dd-mm.mmN(S)
8 57 - 66 Longitude i3,a1,f5.2,a1 ddd-mm.mmE(W)
9 68 - 71 Number of data lines i4
10 72 - 73 Terminator - CR+LF
  1. Data part
No. Column Content Unit Format Remarks
1 1 - 11 Pressure dbar f11.3
2 12 - 22 Temperature deg-C f11.4 ITS-90
3 23 - 33 Salinity PSU f11.4 PSS-78
4 34 - 44 Dissolved oxygen umol/kg f11.3
5 45 - 55 Flag - i11 1 - 7 : space
8 : flag of pressure
9 : flag of temperature
10 : flag of salinity
11 : flag of dissolved oxygen
* reference : 'Definition of Quality Control Flags'
6 56 - 57 Terminator - - CR+LF
  1. Each contents of the data part is stored in 11 bytes.
  2. Missing value is presented by '-5', and error value is presented by '-9'.

Definition of Quality Control Flags
  1. Depth Flags
  2. 0 - accepted value
    1 - error in recorded depth ( same or less than previous depth )
    2 - density inversion

  3. Observed Level Flags
  4. N - missing value
    0 - accepted value
    1 - range outlier ( outside of broad range check )
    2 - failed inversion check
    3 - failed gradient check
    4 - zero anomaly
    5 - failed combined gradient and inversion checks
    6 - failed range and inversion checks
    7 - failed range and gradient checks
    8 - failed range and zero anomaly checks
    9 - failed range and combined gradient and inversion checks
    A - failed visual check

    QCed data were added flag according to the NODC (National Oceanographic Data Center) quality control procedure, additionally visually checked. Please see the site of NODC of the following link for quality control procedure.

Related Information

Update History

2017-06-22
An observation data was registerd.
2014-08-02
An observation data was registerd.
2014-02-15
An observation data was registerd.
2014-02-13
An observation data was registerd.
2013-03-27
An observation data was registerd.
2013-03-26
An observation data was registerd.
2012-10-27
An observation data was registerd.