GTSPP Data Product CentreGTSPP Data Product Centre
GTSPP Data Product Centre for the North Pacific Region hosted by the Japan Meteorological Agency
TACOMA TRADER(9V2401), PX40
Observation period : 2016/6/26 to 2016/7/8
Observation period : 2016/6/26 to 2016/7/8
This page shows results for the PX40 line based on monitoring by the TACOMA TRADER and comparison with the result of assimilation by MOVE-NP.
Overall statistics
| Number of profiles | Number of data | AVE | RMSD | MAXD | MIND |
|---|---|---|---|---|---|
| 190 | 51971 | -0.13 | 0.90 | 3.06 | -26.21 |
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 range | Number of data | AVE | RMSD | MAXD | MIND |
|---|---|---|---|---|---|
| 0-50 | 3956 | -0.29 | 2.32 | 1.96 | -26.21 |
| 50-100 | 3925 | -0.03 | 0.87 | 2.79 | -3.27 |
| 100-150 | 3925 | -0.13 | 0.85 | 3.06 | -3.16 |
| 150-200 | 3925 | -0.23 | 0.82 | 2.93 | -3.15 |
| 200-250 | 3925 | -0.19 | 0.75 | 2.16 | -2.69 |
| 250-300 | 3925 | -0.16 | 0.68 | 2.13 | -3.03 |
| 300-350 | 3925 | -0.17 | 0.68 | 1.96 | -3.19 |
| 350-400 | 3925 | -0.12 | 0.65 | 1.44 | -3.07 |
| 400-450 | 3925 | -0.08 | 0.61 | 1.48 | -2.67 |
| 450-500 | 3925 | -0.05 | 0.58 | 1.87 | -2.28 |
| 500-550 | 1570 | -0.06 | 0.54 | 1.98 | -2.03 |
| 550-600 | 1570 | -0.13 | 0.50 | 2.45 | -2.13 |
| 600-650 | 1560 | -0.17 | 0.47 | 2.53 | -1.86 |
| 650-700 | 1559 | -0.12 | 0.40 | 2.60 | -1.62 |
| 700-750 | 1550 | -0.09 | 0.28 | 0.84 | -0.98 |
| 750-800 | 1550 | -0.07 | 0.27 | 0.95 | -1.06 |
| 800-850 | 1546 | -0.00 | 0.24 | 1.08 | -0.79 |
| 850-900 | 1510 | 0.03 | 0.22 | 1.36 | -0.75 |
| 900-950 | 272 | 0.16 | 0.38 | 2.44 | -0.27 |
| 950-1000 | 3 | 2.47 | 0.01 | 2.49 | 2.46 |
Results of QC
A total of 190 profiles (133910 data, reported by BATHY or TESAC) were received from the TACOMA TRADER.
The results of JMA quality control are as follows.
The results of JMA quality control are as follows.
- Grounded test
- Position on land test
- Regional range test
- Gradient test
Error data: 0 of 133910
On land: 0 of 190
Invalid position: 0 of 190
Error data (low): 0 of 133910
Error data (high): 0 of 133910
Error data: 68 of 133910
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 gradient test. The main cause will be "hitting bottom" of XBT.
- There were large differences between observation data and the results of assimilation in areas south of the Kuroshio extension (west of 154°E) due to cold and warm eddies.
- There are large differences at depths of between 50 and 300m in the seas east from 177°E. The observation data shows sharper thermocline better than the assimilation 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 PX40 moved the entire profile by 5 degree Celsius. |
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| ◊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. |
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| ◊Vertical sections for the result of assimilation by MOVE-NP | ◊Distribution of differences (Obs. - Assim.) by depth |
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| ◊Vertical sections of differences (Obs. - Assim.) | ◊Distribution of differences (Obs. - Assim.) by temperature |
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