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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 : 2018/8/31 to 2018/9/5

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
26	5290	-0.23	1.19	2.41	-7.99

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	640	-0.25	1.03	1.07	-7.61
50-100	606	-0.64	1.59	1.70	-7.99
100-150	533	-0.70	1.57	1.73	-5.99
150-200	484	-0.55	1.40	1.40	-5.56
200-250	441	-0.20	1.26	2.23	-4.02
250-300	425	-0.10	1.18	2.34	-3.02
300-350	392	-0.07	1.05	2.41	-2.38
350-400	347	-0.02	0.88	2.19	-1.44
400-450	325	0.02	0.87	2.02	-1.42
450-500	325	0.16	0.75	1.82	-1.45
500-550	123	0.19	0.68	1.80	-0.99
550-600	110	0.13	0.52	1.53	-0.65
600-650	109	0.12	0.45	1.54	-0.42
650-700	100	-0.07	0.15	0.26	-0.35
700-750	100	-0.07	0.15	0.23	-0.27
750-800	100	-0.04	0.15	0.22	-0.20
800-850	79	0.01	0.18	0.32	-0.22
850-900	46	0.09	0.18	0.35	-0.17
900-950	5	0.10	0.10	0.22	0.01
950-1000	0	-	-	-	-

Results of QC

A total of 26 profiles (839 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 839

Position on land test

On land: 0 of 26

Invalid position: 0 of 26

Regional range test

Error data (low): 0 of 839

Error data (high): 0 of 839

Gradient test

Error data: 0 of 839

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 south of 10°N, there were differences above 2°C between observation data and the results of assimilation. The observation data showed sharper thermocline better than the assimilation data.
With the exception of the above differences and the vertical sections at around 1°N, there were no significant biases in comparison with the results of assimilation by JMA.

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