UNDARUM(5BWD2), PX40
Observation period : 2018/12/10 to 2018/12/23

This page shows results for the PX40 line based on monitoring by the UNDARUM and comparison with the result of assimilation by MOVE-NP.

Overall statistics

Number of profilesNumber of dataAVERMSDMAXDMIND
19561449-0.021.2814.56-4.78

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
0-504875-0.030.431.08-2.92
50-1004787-0.190.822.61-4.24
100-1504725-0.190.842.50-4.53
150-2004725-0.130.872.85-4.78
200-2504725-0.220.894.65-4.51
250-3004725-0.180.976.28-4.54
300-3504717-0.081.107.68-4.32
350-4004693-0.011.238.91-4.49
400-45046750.051.349.99-3.77
450-50046750.121.4610.91-3.52
500-55018700.131.5511.46-3.45
550-60018150.091.5811.72-3.36
600-65017970.031.6112.17-3.08
650-70017900.081.6612.73-2.28
700-75017900.161.7213.35-2.16
750-80017900.231.7713.81-1.78
800-85017900.311.8414.14-1.40
850-90013750.442.1214.32-0.88
900-950985.255.6314.52-0.23
950-1000128.225.3214.561.01


Results of QC

A total of 195 profiles (82602 data, reported by BATHY or TESAC) were received from the UNDARUM.
The results of JMA quality control are as follows.
  • Grounded test

    • Error data: 0 of 82602

  • Position on land test

    • On land: 0 of 195

    Invalid position: 0 of 195

  • Regional range test

    • Error data (low): 0 of 82602

    Error data (high): 0 of 82602

  • Gradient test

    • Error data: 1 of 82602

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


Summary of QC

  • QC detected an unnatural profile shown in 'Results of QC'.
  • There were large differences between observation data and the results of assimilation in the areas near the Kuroshio extension (near 147°E).
  • Among the data that passed JMA's automated quality control procedures, some "hitting bottom" data were found in the seas around Hawaiian Islands (Refer to concerned figures) and the seas around Izu ridge (Refer to concerned figures). The topography used our grounded test was too rough to catch the error.


Figures

◊Station map ◊Vertical temperature profile

Vertical profile of temperature along the observing line of PX40 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)