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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)

NORTHEWEST SANDERLING(VNVZ), PX11
Observation period : 2019/12/19 to 2019/12/23

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

Overall statistics

Number of profiles	Number of data	AVE	RMSD	MAXD	MIND
18	5207	0.30	0.97	10.02	-2.91

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	450	-0.08	0.50	1.26	-2.79
50-100	450	0.36	1.47	5.21	-2.91
100-150	449	0.96	2.17	10.02	-2.40
150-200	404	0.37	0.94	4.35	-1.85
200-250	400	0.31	0.76	2.43	-1.64
250-300	400	0.30	0.74	1.80	-1.60
300-350	400	0.30	0.67	1.55	-1.00
350-400	400	0.24	0.61	1.46	-1.47
400-450	400	0.23	0.55	1.41	-1.11
450-500	364	0.25	0.43	1.41	-0.70
500-550	140	0.24	0.33	1.10	-0.30
550-600	140	0.23	0.28	0.80	-0.65
600-650	140	0.19	0.28	0.74	-0.54
650-700	140	0.15	0.32	0.91	-0.58
700-750	140	0.14	0.32	0.86	-0.40
750-800	140	0.13	0.27	0.79	-0.42
800-850	135	0.14	0.23	0.44	-0.37
850-900	101	0.14	0.24	0.45	-0.40
900-950	14	0.17	0.20	0.42	-0.35
950-1000	0	-	-	-	-

Results of QC

A total of 18 profiles (584 data, reported by BATHY or TESAC) were received from the NORTHEWEST SANDERLING.
The results of JMA quality control are as follows.

Grounded test

Error data: 0 of 584

Position on land test

On land: 0 of 18

Invalid position: 0 of 18

Regional range test

Error data (low): 0 of 584

Error data (high): 0 of 584

Gradient test

Error data: 0 of 584

For details of JMA's quality control procedures, please refer to this page.

Summary of QC

QC detected no unnatural profiles.
One of the observations at around 11°N, 131°E was considered to be erroneous data.
At depths of between 50 and 200 m in areas south of 10°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