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

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Ship Observations Team (SOT)

NORTHWEST SANDPIPER(VNVG), PX11
Observation period : 2019/11/29 to 2019/12/3

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

Overall statistics

Number of profiles	Number of data	AVE	RMSD	MAXD	MIND
9	2482	0.23	0.69	2.84	-2.38

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	225	-0.30	0.33	0.22	-2.12
50-100	225	0.01	0.68	1.56	-2.38
100-150	225	0.60	0.86	2.26	-0.88
150-200	218	0.61	1.18	2.84	-1.20
200-250	200	0.36	0.90	1.79	-1.26
250-300	200	0.23	0.66	1.56	-0.73
300-350	200	0.21	0.63	1.47	-0.80
350-400	199	0.20	0.47	1.06	-0.57
400-450	175	0.24	0.34	0.90	-0.56
450-500	175	0.22	0.28	0.79	-0.43
500-550	65	0.18	0.27	0.79	-0.24
550-600	60	0.23	0.28	0.86	-0.10
600-650	60	0.22	0.35	0.90	-0.27
650-700	53	0.12	0.27	0.87	-0.23
700-750	50	0.11	0.17	0.35	-0.16
750-800	50	0.10	0.19	0.37	-0.18
800-850	50	0.12	0.21	0.39	-0.23
850-900	45	0.23	0.18	0.45	-0.14
900-950	7	0.40	0.03	0.47	0.38
950-1000	0	-	-	-	-

Results of QC

A total of 9 profiles (306 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 306

Position on land test

On land: 0 of 9

Invalid position: 0 of 9

Regional range test

Error data (low): 0 of 306

Error data (high): 0 of 306

Gradient test

Error data: 0 of 306

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 100 and 200 m in areas south of 6°N and depths around 150 m in areas around 20°N, there were differences above 2°C between observation data and the results of assimilation. The observation data showed 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 MOVE-NP	◊Distribution of differences (Obs. - Assim.) by depth

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