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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)

CAP PASADO(V2DV4), PX13
Observation period : 2016/12/18 to 2017/1/5

This page shows results for the PX13 line based on monitoring by the CAP PASADO and comparison with the result of assimilation by MOVE-NP.

Overall statistics

Number of profiles	Number of data	AVE	RMSD	MAXD	MIND
321	66906	-0.15	0.73	7.42	-6.52

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	5275	-0.02	0.37	1.39	-2.45
50-100	5273	-0.33	0.91	1.73	-6.52
100-150	5217	-0.65	1.11	2.33	-6.16
150-200	5132	-0.57	1.10	2.32	-4.90
200-250	5100	-0.26	0.69	3.24	-3.72
250-300	5068	-0.11	0.54	4.44	-2.62
300-350	5040	-0.05	0.49	5.33	-1.72
350-400	5025	-0.04	0.54	6.27	-0.99
400-450	5006	-0.03	0.58	7.00	-1.07
450-500	4979	-0.04	0.61	6.86	-1.31
500-550	1990	-0.01	0.59	6.85	-1.09
550-600	1990	0.04	0.54	6.64	-0.61
600-650	1974	0.05	0.52	7.06	-0.54
650-700	1970	0.06	0.54	7.42	-0.55
700-750	1970	0.06	0.54	7.23	-0.38
750-800	1970	0.07	0.52	6.91	-0.41
800-850	1970	0.07	0.52	6.86	-0.47
850-900	1792	0.07	0.54	6.94	-0.41
900-950	165	0.13	0.61	6.93	-0.20
950-1000	0	-	-	-	-

Results of QC

A total of 321 profiles (143530 data, reported by BATHY or TESAC) were received from the CAP PASADO.
The results of JMA quality control are as follows.

Grounded test

Error data: 1650 of 143530

Position on land test

On land: 0 of 321

Invalid position: 0 of 321

Regional range test

Error data (low): 0 of 143530

Error data (high): 186 of 143530

Gradient test

Error data: 151 of 143530

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.
Among the data that passed JMA's automated quality control procedures, some "hitting bottom" data are found in the seas near the west coast of the United States (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 50 and 200m in the seas south from 12°N. 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 PX13 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