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GTSPP Data Product Centre for the North Pacific Region hosted by the Japan Meteorological Agency

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Ship Observations Team (SOT)

TACOMA TRADER(9V2401), PX40
Observation period : 2016/11/12 to 2016/11/25

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
188	51272	-0.33	1.03	2.78	-26.87

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	3910	-0.23	2.34	1.33	-26.87
50-100	3875	-0.40	0.99	2.23	-4.27
100-150	3875	-0.50	1.11	2.52	-4.43
150-200	3875	-0.48	1.00	2.32	-4.31
200-250	3875	-0.42	0.96	2.78	-4.03
250-300	3875	-0.37	0.88	1.88	-3.45
300-350	3875	-0.39	0.87	1.78	-3.38
350-400	3875	-0.37	0.85	2.08	-3.20
400-450	3873	-0.32	0.83	2.22	-3.06
450-500	3850	-0.28	0.77	2.72	-2.95
500-550	1540	-0.27	0.76	2.63	-2.83
550-600	1540	-0.29	0.70	2.62	-2.52
600-650	1535	-0.28	0.58	1.84	-2.29
650-700	1530	-0.24	0.49	1.74	-1.89
700-750	1530	-0.19	0.39	1.52	-1.56
750-800	1520	-0.14	0.31	1.20	-1.23
800-850	1520	-0.07	0.23	0.73	-0.99
850-900	1507	-0.04	0.20	1.09	-0.78
900-950	292	0.03	0.20	1.17	-0.49
950-1000	0	-	-	-	-

Results of QC

A total of 188 profiles (127616 data, reported by BATHY or TESAC) were received from the TACOMA TRADER.
The results of JMA quality control are as follows.

Grounded test

Error data: 0 of 127616

Position on land test

On land: 0 of 188

Invalid position: 0 of 188

Regional range test

Error data (low): 0 of 127616

Error data (high): 0 of 127616

Gradient test

Error data: 70 of 127616

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 gradient test.
There were large differences between observation data and the results of assimilation in areas south of the Kuroshio extension (west of 150°E) due to cold and warm eddies.
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.

◊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.

◊Vertical sections for the result of assimilation by MOVE-NP	◊Distribution of differences (Obs. - Assim.) by depth

◊Vertical sections of differences (Obs. - Assim.)	◊Distribution of differences (Obs. - Assim.) by temperature