MIRAI MR01-K04 Leg2 Conductivity-Temperature-Depth Profiler (CTD)

Last Modified: 2017-06-22
: MR01-K04 Leg2
: 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 MR01-K04 Leg2 cruise are presented in “System”.
The following software, developed and supplied by the Sea-Bird Electronics, Inc., was used in MR01-K04 Leg2.
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 : SBE13, Sea-Bird Electronics,Inc.
Serial number : 130540
Measurement range : 0 to 15ml/l
Accuracy : 0.1ml/l
Resolution : 0.01ml/l

Sensors used in each cast is as follows.
Cast name Serial number of sensor
Pressure Temperature Salinity Dissolved Oxygen
000S01 42423 031359 041202 130540
001S01 42423 031359 041202 130540
001S02 42423 031359 041202 130540
002S01 42423 031359 041202 130540
003S01 42423 031359 041202 130540
003S02 42423 031359 041202 130540
004S01 42423 031359 041202 130540
004S02 42423 031359 041202 130540
005S01 42423 031359 041202 130540
005S02 42423 031359 041202 130540
005S03 42423 031359 041202 130540
006S01 42423 031359 041202 130540
006S02 42423 031359 041202 130540
007S01 42423 031359 041202 130540
007S02 42423 031359 041202 130540
008S01 42423 031359 041202 130540
009S01 42423 031359 041202 130540
009S02 42423 031359 041202 130540
K01S01 42423 031359 041202 130540
K01S02 42423 031359 041202 130540
K01S03 42423 031359 041202 130540
K02S01 42423 031359 041202 130540
K02S02 42423 031359 041202 130540
K02S03 42423 031359 041202 130540
K02S04 42423 031359 041202 130540
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.
section Extract rows of data from 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.
loopedit Mark a scan with badflag if scan fails pressure reversal or minimum velocity tests.
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.
: MR01-K04 Leg2
: 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
000S01.dat
001S01.dat
001S02.dat
002S01.dat
003S01.dat
003S02.dat
004S01.dat
004S02.dat
005S01.dat
005S02.dat
005S03.dat
006S01.dat
006S02.dat
007S01.dat
007S02.dat
008S01.dat
009S01.dat
009S02.dat
K01S01.dat
K01S02.dat
K01S03.dat
K02S01.dat
K02S02.dat
K02S03.dat
K02S04.dat
ex_read2.f (Sample Program)
Observation List
The list of observation is shown as follows.
Observation Time and Date Lat. [°] Lon. [°]
000S01 2001-08-28 21:04 54.2876 -166.6793
001S01 2001-08-29 02:04 55.0023 -165.9948
001S02 2001-08-29 04:00 54.9995 -166.0001
002S01 2001-08-29 09:09 55.4996 -165.9993
003S01 2001-08-29 17:14 55.9991 -166.0018
003S02 2001-08-29 18:37 55.9980 -166.0015
004S01 2001-08-30 01:22 56.4996 -165.9960
004S02 2001-08-30 03:09 56.5001 -166.0006
005S01 2001-08-30 16:15 56.9995 -166.0004
005S02 2001-08-30 17:57 56.9996 -166.0011
005S03 2001-08-30 18:17 56.9981 -166.0048
006S01 2001-08-30 21:11 57.4978 -166.0025
006S02 2001-08-30 22:43 57.4998 -166.0065
007S01 2001-08-31 05:16 57.9995 -166.0043
007S02 2001-08-31 06:44 57.9998 -166.0011
008S01 2001-08-31 10:12 58.5001 -166.0000
009S01 2001-08-31 14:11 58.9990 -165.9990
009S02 2001-08-31 15:34 58.9998 -165.9975
K01S01 2001-09-03 22:16 51.2988 165.3013
K01S02 2001-09-04 05:44 51.2991 165.1615
K01S03 2001-09-05 05:47 51.3361 165.2024
K02S01 2001-09-07 19:13 46.8661 159.9813
K02S02 2001-09-08 03:13 46.9363 159.9836
K02S03 2001-09-09 03:21 47.0096 159.9720
K02S04 2001-09-10 11:01 46.8721 159.8646
: MR01-K04 Leg2
: 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.
2014-07-16
An observation data was registerd.
2014-02-06
An observation data was registerd.
2014-02-05
An observation data was registerd.
2012-12-25
An observation data was registerd.