TALLAHASSEE(9V5027, CGU7DKF), PX40
Observation period : 2023/3/12 to 2023/3/26

This page shows results for the PX40 line based on monitoring by the TALLAHASSEE and comparison with the result of assimilation by NPR-4DVAR.

Overall statistics

Number of profilesNumber of dataAVERMSDMAXDMIND
107348350.050.648.62-2.57

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
0-5026710.220.471.34-0.94
50-1002650-0.010.531.57-2.56
100-1502650-0.030.723.52-2.57
150-2002650-0.020.632.68-2.45
200-2502650-0.080.601.90-2.46
250-3002650-0.070.542.15-1.78
300-35026500.040.513.09-1.61
350-40026500.090.574.49-1.21
400-45026500.110.605.13-1.07
450-50026500.100.615.54-0.97
500-55010600.100.645.96-0.75
550-60010300.050.696.50-0.74
600-65010300.010.726.99-0.94
650-70010300.020.777.45-1.05
700-75010300.050.797.84-1.12
750-80010300.100.828.20-0.74
800-85010300.160.848.43-0.60
850-90010010.180.868.62-0.42
900-950730.130.171.21-0.10
950-10000----


Results of QC

A total of 107 profiles (47488 data, reported by BATHY or TESAC) were received from the TALLAHASSEE.
The results of JMA quality control are as follows.
  • Grounded test

    • Error data: 0 of 47488

  • Position on land test

    • On land: 0 of 107

    Invalid position: 0 of 107

  • Regional range test

    • Error data (low): 0 of 47488

    Error data (high): 3 of 47488

  • Gradient test

    • Error data: 2 of 47488

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


Summary of QC

  • QC detected some unnatural profiles shown in 'Results of QC'.
  • One of the observations at around 24°N, 178°W was considered to be erroneous data.
  • At the depths between 100 m and 200 m in the seas east of the International Date Line, there were differences above 2°C between observation data and the results of assimilation.


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 NPR-4DVAR ◊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)