GTSPP Data Product Centre

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

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The last 30 days SOOP observation

Data on SOOP lines

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100m TS by NPR-4DVAR

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OceanOPS

Ship Observations Team (SOT)

KEIFU MARU(JPBN), PX45
Observation period : 2022/1/8 to 2022/2/3

This page shows results for the PX45 line based on monitoring by the KEIFU MARU and comparison with the result of assimilation by NPR-4DVAR.

Overall statistics

Number of profiles	Number of data	AVE	RMSD	MAXD	MIND
41	14391	0.10	0.57	4.81	-2.62

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	1025	-0.00	0.34	1.13	-1.07
50-100	1025	-0.10	0.80	4.79	-1.77
100-150	1025	-0.12	0.96	4.81	-2.40
150-200	1025	0.06	0.76	3.77	-2.62
200-250	1025	0.24	0.76	4.00	-1.20
250-300	1025	0.30	0.69	2.64	-1.52
300-350	1025	0.27	0.55	2.26	-1.15
350-400	1025	0.18	0.46	1.11	-1.41
400-450	1025	0.15	0.40	1.13	-1.42
450-500	1025	0.12	0.35	0.80	-1.13
500-550	410	0.15	0.33	1.03	-0.95
550-600	410	0.09	0.31	1.02	-0.88
600-650	410	0.07	0.28	0.97	-0.83
650-700	410	0.04	0.26	0.79	-0.50
700-750	410	0.05	0.25	0.87	-0.53
750-800	410	0.07	0.24	0.86	-0.60
800-850	410	0.08	0.22	0.84	-0.49
850-900	410	0.09	0.20	0.78	-0.35
900-950	410	0.09	0.18	0.70	-0.24
950-1000	410	0.08	0.16	0.59	-0.25

Results of QC

A total of 41 profiles (946 data, reported by BATHY or TESAC) were received from the KEIFU MARU.
The results of JMA quality control are as follows.

Grounded test

Error data: 0 of 946

Position on land test

On land: 0 of 41

Invalid position: 0 of 41

Regional range test

Error data (low): 0 of 946

Error data (high): 0 of 946

Gradient test

Error data: 0 of 946

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

Summary of QC

QC detected no unnatural profiles.
At depths of between 70 and 120 m in areas south of 8°N, there were differences above 3°C between observation data and the results of assimilation. The observation data showed deeper mixed layer than the assimilation data.

Figures

◊Station map	◊Vertical temperature profile Vertical profile of temperature along the observing line of PX45 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 NPR-4DVAR	◊Distribution of differences (Obs. - Assim.) by depth

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