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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 : 2019/10/14 to 2019/10/18

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
24	7102	0.15	0.71	5.38	-2.49

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	600	-0.29	0.39	0.41	-2.24
50-100	600	0.27	1.11	4.16	-2.31
100-150	576	0.16	1.27	5.38	-2.49
150-200	575	0.22	1.15	4.86	-2.05
200-250	551	0.42	0.71	2.89	-1.43
250-300	550	0.29	0.55	1.48	-1.07
300-350	550	0.16	0.48	1.00	-1.09
350-400	550	0.14	0.39	0.94	-0.78
400-450	550	0.08	0.36	0.98	-0.53
450-500	550	0.13	0.33	0.94	-0.41
500-550	212	0.16	0.31	1.04	-0.34
550-600	204	0.18	0.25	0.93	-0.34
600-650	200	0.18	0.21	0.77	-0.25
650-700	200	0.17	0.18	0.65	-0.14
700-750	192	0.12	0.15	0.68	-0.16
750-800	186	0.09	0.13	0.36	-0.20
800-850	167	0.11	0.14	0.47	-0.17
850-900	89	0.15	0.16	0.55	-0.06
900-950	0	-	-	-	-
950-1000	0	-	-	-	-

Results of QC

A total of 24 profiles (811 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 811

Position on land test

On land: 0 of 24

Invalid position: 0 of 24

Regional range test

Error data (low): 0 of 811

Error data (high): 0 of 811

Gradient test

Error data: 0 of 811

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 250 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