MIRAI MR03-K01 Conductivity-Temperature-Depth Profiler (CTD)

Last Modified: 2017-06-22
: MR03-K01
: 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 MR03-K01 cruise are presented in “System”.
The following software, developed and supplied by the Sea-Bird Electronics, Inc., was used in MR03-K01.
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 : 42423
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 : 031359
Measurement range : -5.0 to +35degC
Accuracy : 0.001degC
Resolution : 0.0002degC
• Salinity sensor
Model : SBE4, Sea-Bird Electronics,Inc.
Serial number : 041202
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 : 430069
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
008M0142423031359041202430069
008M0242423031359041202430069
008M0342423031359041202430069
006M0142423031359041202430069
006M0242423031359041202430069
004M0142423031359041202430069
004M0242423031359041202430069
004M0342423031359041202430069
003M0142423031359041202430069
009M0142423031359041202430069
009M0242423031359041202430069
011M0142423031359041202430069
013M0242423031359041202430069
001M0142423031359041202430069
001M0242423031359041202430069
033M0142423031359041202430069
035M0142423031359041202430069
037M0142423031359041202430069
039M0142423031359041202430069
041M0142423031359041202430069
040M0142423031359041202430069
038M0142423031359041202430069
036M0142423031359041202430069
034M0142423031359041202430069
034M0242423031359041202430069
032M0142423031359041202430069
030M0142423031359041202430069
028M0142423031359041202430069
027M0142423031359041202430069
025M0142423031359041202430069
023M0142423031359041202430069
022M0142423031359041202430069
021M0142423031359041202430069
020M0142423031359041202430069
019M0142423031359041202430069
017M0142423031359041202430069
015M0142423031359041202430069
014M0142423031359041202430069
012M0142423031359041202430069
010M0142423031359041202430069
Calibration Information is as follows.
(1) Data processing sequence for SEASOFT is as follows;
command function
datcnv Convert raw data to engineering units, and store converted data in file.
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.
section Extract rows of data from file.
loopedit Mark a scan with badflag if scan fails pressure reversal or minimum velocity tests.
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) The secondary sensor was adopted as CTD water temperature since the primary sensor had pressure dependency. Please refer to “data correction” in detail.
: MR03-K01
: 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
001M01.dat
001M02.dat
003M01.dat
004M01.dat
004M02.dat
004M03.dat
006M01.dat
006M02.dat
008M01.dat
008M02.dat
008M03.dat
009M01.dat
009M02.dat
010M01.dat
011M01.dat
012M01.dat
013M02.dat
014M01.dat
015M01.dat
017M01.dat
019M01.dat
020M01.dat
021M01.dat
022M01.dat
023M01.dat
025M01.dat
027M01.dat
028M01.dat
030M01.dat
032M01.dat
033M01.dat
034M01.dat
034M02.dat
035M01.dat
036M01.dat
037M01.dat
038M01.dat
039M01.dat
040M01.dat
041M01.dat
ex_read2.f (Sample Program)
Observation List
The list of observation is shown as follows.
Observation Time and Date Lat. [°] Lon. [°]
001M01 2003-03-07 11:47 39.0015 159.9963
001M02 2003-03-07 16:25 39.0456 160.0856
003M01 2003-02-27 23:49 46.9990 164.9986
004M01 2003-02-26 21:46 50.9981 164.9973
004M02 2003-02-27 04:29 51.0093 164.9636
004M03 2003-02-27 07:09 51.0001 164.9991
006M01 2003-02-25 04:05 47.0075 159.8943
006M02 2003-02-25 06:09 47.0075 159.8976
008M01 2003-02-23 13:07 43.9976 154.9991
008M02 2003-02-23 15:28 44.0001 155.0001
008M03 2003-02-23 20:55 44.0001 155.0000
009M01 2003-03-02 07:06 43.0221 155.0161
009M02 2003-03-05 17:56 43.0398 155.0500
010M01 2003-03-23 21:21 42.0001 155.0006
011M01 2003-03-06 03:56 41.0013 155.0013
012M01 2003-03-23 08:53 39.9990 155.0010
013M02 2003-03-06 16:29 39.0001 154.9998
014M01 2003-03-22 20:00 37.9988 155.0013
015M01 2003-03-21 23:20 37.0021 154.9983
017M01 2003-03-20 19:59 35.9965 155.0038
019M01 2003-03-20 04:31 34.9978 155.0013
020M01 2003-03-19 19:55 34.0005 155.0013
021M01 2003-03-19 04:45 32.9985 154.9996
022M01 2003-03-18 19:56 31.9980 154.9996
023M01 2003-03-18 04:48 30.9885 155.0006
025M01 2003-03-17 19:58 30.0008 155.0008
027M01 2003-03-17 04:49 28.9986 155.0000
028M01 2003-03-16 19:56 27.9966 154.9986
030M01 2003-03-16 07:02 26.9983 155.0016
032M01 2003-03-15 22:50 26.0001 155.0031
033M01 2003-03-11 02:45 25.0005 155.0011
034M01 2003-03-15 05:49 24.0038 154.9956
034M02 2003-03-15 09:00 24.0145 154.9788
035M01 2003-03-11 14:58 23.0013 155.0003
036M01 2003-03-14 10:44 21.9951 155.0001
037M01 2003-03-12 02:13 21.0011 155.0015
038M01 2003-03-13 22:02 19.9868 154.9996
039M01 2003-03-12 11:40 19.0021 154.9991
040M01 2003-03-13 08:27 17.9941 154.9976
041M01 2003-03-12 23:18 17.0035 154.9983
: MR03-K01
: 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.
2014-07-23
An observation data was registerd.
2014-01-11
An observation data was registerd.
2013-03-27
An observation data was registerd.
2012-12-25
An observation data was registerd.