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 SANDERLING(VNVZ), PX11
Observation period : 2023/5/27 to 2023/6/4

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

Overall statistics

Number of profiles	Number of data	AVE	RMSD	MAXD	MIND
26	4596	0.30	0.82	3.50	-3.54

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	375	0.30	0.42	1.23	-0.60
50-100	375	0.51	0.83	2.38	-2.56
100-150	375	0.39	1.32	3.03	-3.54
150-200	375	0.39	1.23	3.06	-2.54
200-250	375	0.24	1.21	3.50	-2.30
250-300	375	0.37	0.88	2.42	-2.04
300-350	375	0.35	0.72	1.76	-1.05
350-400	375	0.28	0.64	1.49	-0.88
400-450	353	0.27	0.50	1.46	-0.62
450-500	350	0.33	0.50	1.19	-0.60
500-550	126	0.32	0.45	1.25	-0.46
550-600	120	0.23	0.41	1.37	-0.36
600-650	120	0.11	0.37	1.07	-0.39
650-700	120	0.07	0.34	0.84	-0.44
700-750	120	-0.01	0.32	0.63	-0.64
750-800	115	-0.02	0.30	0.42	-0.68
800-850	99	-0.01	0.29	0.50	-0.66
850-900	71	0.09	0.27	0.61	-0.45
900-950	2	-0.02	0.18	0.16	-0.20
950-1000	0	-	-	-	-

Results of QC

A total of 26 profiles (852 data, reported by BATHY or TESAC) were received from the NORTHWEST SANDERLING.
The results of JMA quality control are as follows.

Grounded test

Error data: 0 of 852

Position on land test

On land: 0 of 26

Invalid position: 0 of 26

Regional range test

Error data (low): 0 of 852

Error data (high): 2 of 852

Gradient test

Error data: 0 of 852

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

Summary of QC

QC detected no unnatural profiles.
QC detected some unnatural profiles shown in 'Results of QC'.
There was no significant bias in comparison with the results of assimilation by JMA.
At the depths between 180 m and 300 m in the seas around 5°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