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 : 2022/4/29 to 2022/5/5

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
15	2669	0.23	0.73	2.96	-2.43

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	271	0.27	0.52	1.90	-1.68
50-100	250	0.29	1.04	2.76	-2.43
100-150	230	0.54	0.98	2.96	-1.80
150-200	225	0.29	0.93	2.00	-1.57
200-250	206	0.20	0.93	1.65	-1.27
250-300	200	0.21	0.92	1.36	-1.69
300-350	200	0.15	0.72	1.24	-1.23
350-400	200	0.16	0.42	1.25	-0.64
400-450	200	0.22	0.33	1.03	-0.64
450-500	200	0.27	0.37	1.08	-0.66
500-550	80	0.21	0.44	1.13	-0.63
550-600	80	0.17	0.48	1.44	-0.46
600-650	80	0.21	0.58	1.77	-0.48
650-700	63	0.05	0.41	1.88	-0.55
700-750	60	-0.05	0.22	0.16	-0.53
750-800	60	-0.09	0.25	0.22	-0.69
800-850	51	-0.00	0.24	0.28	-0.83
850-900	13	0.12	0.08	0.29	-0.01
900-950	0	-	-	-	-
950-1000	0	-	-	-	-

Results of QC

A total of 15 profiles (484 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 484

Position on land test

On land: 0 of 15

Invalid position: 0 of 15

Regional range test

Error data (low): 0 of 484

Error data (high): 0 of 484

Gradient test

Error data: 0 of 484

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 40 and 160 m in the seas around 20°N, there were differences above 2°C between observation data and the results of assimilation. The observation data showed deeper mixed layer and sharper thermocline than the assimilation data.

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