Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Delayed cut-off 4DVAR at 2018-08-21 00:00

Ozone
AURA OMI layer ozone, top pressure 1 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=2696, expected range: 14300.00 27000.00
Considerably: avg_fg_depar_du=-1, expected range: -0.97 1.67
amdar
OVI0S5ZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.29
ID10GCZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.16 1.34
In-Situ measurements
SYNOP Surface pressure (Pa) 02 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=413, expected range: 2800.00 3100.00
SYNOP Surface pressure (Pa) WMO BLOCK 71 0 0 : OutOfRange
Severely: count(*)=1786, expected range: 2300.00 2600.00
SYNOP Surface pressure (Pa) WMO BLOCK 72 0 0 : OutOfRange
Severely: count(*)=324, expected range: 430.00 600.00
All European Wind Profiler Wind Vector difference (m/s) 01 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 08 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 76 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 76 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 76 70000 101325 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 70 0 0 : OutOfRange
Considerably: count(*)=23, expected range: 30.00 57.00
Moored Buoy Surface pressure (Pa) WMO BLOCK 14 0 0 : OutOfRange
Considerably: count(*)=12, expected range: 15.90 30.00
TEMP Land Report Temperature (k) 02 0 40000 : OutOfRange
Considerably: count(*)=308, expected range: 530.00 1340.00
SYNOP Surface pressure (Pa) WMO BLOCK 73 0 0 : OutOfRange
Slightly: count(*)=3, expected range: 4.00 4.10
Drifter Buoy Surface pressure (Pa) WMO BLOCK 72 0 0 : OutOfRange
Slightly: count(*)=32, expected range: 34.00 61.00
Moored Buoy Surface pressure (Pa) WMO BLOCK 13 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=40, expected range: 42.00 53.00
BUOYS
23091 Drifter Buoy Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
4101537 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=237, expected range: 0.00 151.00
3101538 189 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
ship
00000 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=71, expected range: 0.00 50.00
CQAH9 SHIP Report Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
46054 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
08345 170 Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=77, expected range: 0.00 50.00
68674 Land Automatic Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
83971 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
98618 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=5, expected range: -1.71 2.50
Severely: rms(fg_depar)=7, expected range: 0.00 4.40