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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 : 2017/11/22 to 2017/12/7

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
311	63984	-0.08	0.56	5.14	-4.64

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	5050	0.04	0.44	1.13	-2.47
50-100	5050	-0.31	0.84	3.00	-4.50
100-150	4967	-0.33	0.81	3.90	-4.50
150-200	4907	-0.29	0.95	4.63	-4.64
200-250	4865	-0.24	0.78	5.14	-3.85
250-300	4850	-0.02	0.46	1.88	-1.94
300-350	4850	0.01	0.32	1.81	-1.55
350-400	4835	-0.01	0.30	1.85	-1.00
400-450	4825	-0.03	0.29	1.94	-1.03
450-500	4825	-0.02	0.28	2.03	-0.86
500-550	1924	-0.00	0.26	2.07	-0.61
550-600	1920	0.02	0.24	2.07	-0.65
600-650	1904	0.03	0.22	1.98	-0.49
650-700	1900	0.04	0.20	1.98	-0.49
700-750	1898	0.05	0.20	1.98	-0.42
750-800	1884	0.06	0.19	1.98	-0.32
800-850	1859	0.07	0.19	2.03	-0.30
850-900	1468	0.06	0.18	1.98	-0.36
900-950	201	0.05	0.11	0.34	-0.16
950-1000	2	0.01	0.00	0.02	0.01

Results of QC

A total of 311 profiles (144378 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: 1931 of 144378

Position on land test

On land: 0 of 311

Invalid position: 0 of 311

Regional range test

Error data (low): 0 of 144378

Error data (high): 178 of 144378

Gradient test

Error data: 1 of 144378

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'.
Among the data that passed QC, 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.
Some observations at around 13°N are considered to be erroneous data.
There were large differences at depths of between 50 and 250m. The observation data shows sharper thermocline better than the assimilation data.

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