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

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100m TS by NPR-4DVAR

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Ship Observations Team (SOT)

NORTHWEST SANDPIPER(VNVG), PX11
Observation period : 2023/3/10 to 2023/3/15

This page shows results for the PX11 line based on monitoring by the NORTHWEST SANDPIPER and comparison with the result of assimilation by NPR-4DVAR.

Overall statistics

Number of profiles	Number of data	AVE	RMSD	MAXD	MIND
12	3391	0.13	0.84	5.34	-4.02

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	300	0.10	0.47	1.21	-0.92
50-100	300	0.20	0.91	1.83	-3.41
100-150	300	0.14	1.22	4.01	-1.99
150-200	286	0.05	1.67	5.34	-4.02
200-250	275	-0.09	1.23	3.05	-2.59
250-300	275	0.15	0.77	1.72	-1.71
300-350	261	0.11	0.48	1.02	-1.38
350-400	250	0.30	0.35	1.03	-0.37
400-450	249	0.34	0.39	1.08	-0.39
450-500	225	0.15	0.34	0.85	-0.39
500-550	90	0.18	0.31	0.74	-0.51
550-600	90	0.08	0.36	0.63	-0.63
600-650	90	0.00	0.38	0.55	-0.68
650-700	90	-0.01	0.37	0.70	-0.60
700-750	90	-0.00	0.26	0.38	-0.50
750-800	90	0.02	0.26	0.45	-0.40
800-850	82	0.10	0.26	0.54	-0.34
850-900	43	0.16	0.18	0.58	-0.12
900-950	5	0.17	0.03	0.20	0.12
950-1000	0	-	-	-	-

Results of QC

A total of 12 profiles (385 data, reported by BATHY or TESAC) were received from the NORTHWEST SANDPIPER.
The results of JMA quality control are as follows.

Grounded test

Error data: 0 of 385

Position on land test

On land: 0 of 12

Invalid position: 0 of 12

Regional range test

Error data (low): 0 of 385

Error data (high): 0 of 385

Gradient test

Error data: 0 of 385

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

Summary of QC

QC detected no unnatural profiles.
One of the observations at around 14°N, 130°E was considered to be erroneous data.
At depths of between 160 and 220 m in the seas around 4°N, there were differences above 2°C between observation data and the results of assimilation.

Figures

◊Station map	◊Vertical temperature profile Vertical profile of temperature along the observing line of PX11 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