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GTSPP Data Product Centre for the North Pacific Region hosted by the Japan Meteorological Agency

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100m TS by NPR-4DVAR

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Ship Observations Team (SOT)

E.R. WILHELMSHAVEN(ELZY3), PX09
Observation period : 2015/5/11 to 2015/5/22

This page shows results for the PX09 line based on monitoring by the E.R. WILHELMSHAVEN and comparison with the result of assimilation by MOVE-NP.

Overall statistics

Number of profiles	Number of data	AVE	RMSD	MAXD	MIND
219	34013	-0.05	0.69	4.18	-6.45

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	2600	0.12	1.32	0.81	-4.35
50-100	2600	-0.34	1.07	3.14	-6.45
100-150	2600	-0.26	1.14	3.56	-4.96
150-200	2600	-0.26	0.94	3.93	-3.62
200-250	2600	-0.14	0.67	4.05	-3.17
250-300	2591	-0.03	0.35	4.18	-2.64
300-350	2575	-0.01	0.30	1.02	-1.48
350-400	2575	-0.03	0.33	0.60	-1.16
400-450	2575	-0.02	0.36	0.74	-1.20
450-500	2575	0.06	0.22	0.88	-1.08
500-550	1030	0.06	0.30	1.04	-0.93
550-600	1030	0.04	0.28	1.11	-0.82
600-650	1030	0.06	0.25	1.21	-0.71
650-700	1030	0.06	0.23	1.00	-0.64
700-750	1030	0.07	0.22	1.13	-0.55
750-800	1030	0.07	0.21	1.22	-0.44
800-850	1030	0.07	0.16	1.41	-0.40
850-900	832	0.07	0.06	1.14	-0.34
900-950	80	0.15	0.00	0.85	-0.19
950-1000	0	-	-	-	-

Results of QC

A total of 219 profiles (100364 data, reported by BATHY or TESAC) were received from the E.R. WILHELMSHAVEN.
The results of JMA quality control are as follows.

Grounded test

Error data: 234 of 100364

Position on land test

On land: 0 of 219

Invalid position: 0 of 219

Regional range test

Error data (low): 0 of 100364

Error data (high): 8 of 100364

Gradient test

Error data: 55 of 100364

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

Summary of QC

Some erroneous profiles are detected by JMA's automated quality control procedures. These are checked by the grounded test, regional range test and the gradient test. The main cause will be "hitting bottom" of XBT.
There are large differences at depths of between 100 and 200m. The observation data shows sharper thermocline better than the assimilation data.
With the exception of the above errors and differences, 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 PX09 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