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

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NORTHWEST SANDPIPER(VNVG), PX11
Observation period : 2021/10/24 to 2021/10/31

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
25	5489	0.34	0.88	4.46	-2.81

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	463	-0.15	0.37	1.57	-1.84
50-100	428	-0.03	0.92	2.28	-2.81
100-150	425	0.87	1.32	3.96	-2.64
150-200	425	0.91	1.45	4.46	-2.52
200-250	425	0.77	1.34	4.41	-2.53
250-300	425	0.59	0.98	3.09	-1.02
300-350	425	0.41	0.58	2.17	-0.69
350-400	425	0.26	0.37	1.45	-0.41
400-450	425	0.27	0.54	2.20	-0.56
450-500	425	0.23	0.37	1.52	-0.52
500-550	170	0.12	0.25	0.79	-0.49
550-600	170	0.12	0.20	0.63	-0.24
600-650	170	0.07	0.17	0.65	-0.21
650-700	162	0.05	0.16	0.51	-0.24
700-750	160	0.09	0.19	0.51	-0.32
750-800	160	0.11	0.20	0.50	-0.44
800-850	142	0.14	0.19	0.51	-0.47
850-900	57	0.18	0.17	0.54	-0.12
900-950	7	0.16	0.10	0.24	-0.07
950-1000	0	-	-	-	-

Results of QC

A total of 25 profiles (824 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 824

Position on land test

On land: 0 of 25

Invalid position: 0 of 25

Regional range test

Error data (low): 0 of 824

Error data (high): 0 of 824

Gradient test

Error data: 0 of 824

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 140 and 280 m in areas south of 6°N, there were differences above 3°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 MOVE-NP	◊Distribution of differences (Obs. - Assim.) by depth

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