SAFMARINE MULANJE(VROX6), PX05
Observation period : 2016/5/11 to 2016/5/23

This page shows results for the PX05 line based on monitoring by the SAFMARINE MULANJE and comparison with the result of assimilation by MOVE-NP.

Overall statistics

Number of profilesNumber of dataAVERMSDMAXDMIND
26154091-0.191.1616.14-4.27

Abbreviations in the table indicate:
AVE: average difference (observation value minus assimilation value)
RMSD: root mean square of difference
MAXD: maximum difference
MIND: minimum difference



Statistics for each depth range

Depth rangeNumber of dataAVERMSDMAXDMIND
0-5041500.010.602.30-3.05
50-1004150-0.200.884.23-3.22
100-1504150-0.571.035.62-4.21
150-2004150-0.821.247.05-4.27
200-2504150-0.361.068.21-3.08
250-3004150-0.111.059.20-3.42
300-3504142-0.111.0910.00-3.65
350-4004125-0.151.0610.24-3.33
400-4504125-0.171.0811.22-2.73
450-5004125-0.131.1112.24-2.68
500-5501650-0.101.1613.11-2.54
550-6001650-0.081.2113.71-2.34
600-6501650-0.071.2414.33-2.02
650-7001650-0.021.2814.83-1.67
700-75016400.021.3215.25-1.52
750-80016400.041.3415.54-1.27
800-85016330.081.3615.77-1.03
850-90010990.221.6715.96-0.77
900-950583.885.8216.13-0.23
950-1000410.235.9116.144.31


Results of QC

A total of 261 profiles (115313 data, reported by BATHY or TESAC) were received from the SAFMARINE MULANJE.
The results of JMA quality control are as follows.
  • Grounded test

    • Error data: 1792 of 115313

  • Position on land test

    • On land: 0 of 261

    Invalid position: 0 of 261

  • Regional range test

    • Error data (low): 0 of 115313

    Error data (high): 152 of 115313

  • Gradient test

    • Error data: 6 of 115313

For details of JMA's quality control procedures, please refer to this page.


Summary of QC

  • Some erroneous profiles are detected by JMA's automated quality control procedures. These are checked by the grounded test, regional range test and the gradient test. The main cause will be "hitting bottom" of XBT.
  • Among the data that passed JMA's automated quality control procedures, some "hitting bottom" data are found in the seas around Izu ridge (Refer to concerned figures). The topography used our grounded test is too rough to catch the error.
  • There are large differences at depths of between 100 and 250m in the seas south of 15°N. The observation data shows sharper thermocline better than the assimilation data.
  • One of the observations at around 32.5°N,140.8°E is considered to be erroneous data.
  • With the exception of the above errors and differences, there were no significant biases in comparison with the results of assimilation by JMA.


Figures

◊Station map ◊Vertical temperature profile

Vertical profile of temperature along the observing line of PX05 moved the entire profile by 5 degree Celsius.
station map water fall
◊Vertical observation sections ◊Summary of differences (Obs. - Assim.) by depth

Dots and error bars represent the averages and root mean squares of the differences, respectively. Crosses represent the maximum/minimum differences.
observation scatter plot (summary of all station)
◊Vertical sections for the result of assimilation by MOVE-NP ◊Distribution of differences (Obs. - Assim.) by depth
result of assimilation scatter plot(depth bases)
◊Vertical sections of differences (Obs. - Assim.) ◊Distribution of differences (Obs. - Assim.) by temperature
differences (Obs. - Assim.) scatter plot (tempereture basis)