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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 : 2020/1/21 to 2020/1/28

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
29	5092	0.26	0.87	6.00	-2.25

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	425	0.11	0.30	1.50	-1.32
50-100	425	0.69	1.42	6.00	-1.36
100-150	425	0.85	1.68	5.84	-2.01
150-200	413	0.39	1.20	3.01	-2.25
200-250	400	0.31	0.72	2.15	-1.71
250-300	400	0.16	0.60	1.40	-1.41
300-350	400	0.10	0.61	1.55	-0.93
350-400	400	-0.05	0.48	0.97	-0.91
400-450	400	0.01	0.48	1.29	-0.77
450-500	374	0.11	0.37	1.14	-0.54
500-550	140	0.20	0.32	1.05	-0.33
550-600	140	0.27	0.32	1.11	-0.15
600-650	140	0.32	0.30	1.01	-0.06
650-700	140	0.27	0.29	0.96	-0.17
700-750	140	0.23	0.25	0.77	-0.21
750-800	140	0.16	0.21	0.66	-0.22
800-850	124	0.12	0.20	0.51	-0.30
850-900	66	0.09	0.24	0.45	-0.40
900-950	0	-	-	-	-
950-1000	0	-	-	-	-

Results of QC

A total of 29 profiles (985 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 985

Position on land test

On land: 0 of 29

Invalid position: 0 of 29

Regional range test

Error data (low): 0 of 985

Error data (high): 0 of 985

Gradient test

Error data: 0 of 985

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 50 and 200 m in areas south of 8°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