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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 : 2020/3/16 to 2020/3/23

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
16	2851	0.09	0.70	4.04	-2.00

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	0.01	0.19	0.64	-0.26
50-100	225	0.42	0.95	3.82	-1.02
100-150	225	-0.03	1.43	4.04	-1.95
150-200	225	-0.30	1.28	3.17	-2.00
200-250	225	-0.19	0.71	1.61	-1.94
250-300	225	0.16	0.40	1.08	-0.53
300-350	225	0.13	0.44	1.05	-0.73
350-400	225	0.14	0.33	1.02	-0.44
400-450	225	0.20	0.26	0.77	-0.30
450-500	220	0.21	0.26	0.74	-0.30
500-550	80	0.13	0.19	0.44	-0.32
550-600	80	0.09	0.15	0.31	-0.28
600-650	80	0.11	0.17	0.42	-0.25
650-700	80	0.10	0.21	0.52	-0.20
700-750	80	0.12	0.23	0.64	-0.25
750-800	80	0.14	0.20	0.59	-0.21
800-850	71	0.16	0.17	0.45	-0.14
850-900	47	0.17	0.12	0.39	-0.15
900-950	8	0.23	0.05	0.30	0.16
950-1000	0	-	-	-	-

Results of QC

A total of 16 profiles (544 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 544

Position on land test

On land: 0 of 16

Invalid position: 0 of 16

Regional range test

Error data (low): 0 of 544

Error data (high): 0 of 544

Gradient test

Error data: 0 of 544

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 the seas around 5°S, 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