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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Ship Observations Team (SOT)

NORTHWEST SANDPIPER(VNVG), PX11
Observation period : 2023/2/7 to 2023/2/13

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
8	1531	0.19	0.50	1.90	-2.09

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	150	0.15	0.29	1.63	-0.21
50-100	150	0.26	0.60	1.90	-0.71
100-150	148	0.45	0.62	1.66	-0.99
150-200	125	-0.33	0.80	1.10	-2.09
200-250	125	0.04	0.64	1.06	-1.14
250-300	125	0.25	0.38	0.90	-0.55
300-350	125	0.39	0.26	0.97	-0.14
350-400	102	0.35	0.36	1.06	-0.22
400-450	100	0.26	0.23	0.68	-0.08
450-500	100	0.24	0.30	0.72	-0.17
500-550	40	0.15	0.26	0.58	-0.16
550-600	40	0.05	0.24	0.44	-0.41
600-650	40	0.02	0.25	0.37	-0.38
650-700	40	0.02	0.23	0.32	-0.35
700-750	40	0.06	0.29	0.48	-0.36
750-800	34	0.11	0.33	0.46	-0.36
800-850	24	0.23	0.25	0.40	-0.33
850-900	20	0.31	0.07	0.49	0.23
900-950	3	0.39	0.10	0.53	0.31
950-1000	0	-	-	-	-

Results of QC

A total of 8 profiles (265 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 265

Position on land test

On land: 0 of 8

Invalid position: 0 of 8

Regional range test

Error data (low): 0 of 265

Error data (high): 0 of 265

Gradient test

Error data: 0 of 265

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

Summary of QC

QC detected no unnatural profiles.
At depth of around 200 m in the seas around 8°N, there were large differences 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