Report
on the Quality of Land Surface Observations
in Region V
January
to June 2006
Report No. 19
WMC Melbourne
Lead Centre for Monitoring of the Quality of Land Surface Observations in RA-V
Data Management Section
Communications & Computing Systems Branch
Bureau of Meteorology, Australia
Distrtibution List
| Mr D. Schiessl | Director, World Weather Watch, WMO |
| Dr A.I. Gusev | President CBS |
| Dr E. I. Sarukhanian | WWW Department, WMO |
| Mr S. L. Woon | President of RA V |
| Mr F. Lalaurette | ECMWF |
| Mr I. Gitonga | Kenya Meteorological Department |
| Mr H. Sasaki | Japanese Meteorological Agency |
| Mr A. Rabiolo | Servicio Meteorologico Nacional, Argentina |
| Dr B. Ballish | NCEP, Washington |
| Mr G. Verner | Canadian Meteorological Centre |
| Mr B. Richter | Deutscher Wetterdienst, German |
| Mr H. Benichou | Meteo-France |
| Dr B. Macpherson | UK Meteorological Office |
| Focal Points for Data Quality Monitoring in RA-V | |
For further information or comments on this report please contact:
Data Management Section
Communications & Computing Systems Branch
Bureau of Meteorology
G.P.O. Box 1289K
Melbourne, VIC 3001
Email: stdm@bom.gov.au
- Introduction
Within the Data Management Section of the Bureau of Meteorology lie responsibilities for collecting a full set of meteorological data in real-time from the WMO Global Observing System, and for making such data available to the Analysis-Prognosis models along with some indication as to reliability of report content.
Real-time judgement as to whether a reported element be assimilated by models relies largely on first guess fields, supplemented by observations from any neighbouring stations. Additionally, listings of platforms, which are currently considered suspect, are presented to the Analysis model.
To monitor platform performance, and also to expose likely positional errors, selected reported elements are paired with the
interpolated first-guess value from the global model (6 hour forecast field) and analysed statistically each 6 months in a format which accords with the CBS recommended standards for the exchange of monitoring results. All observations used are unvalidated or "raw" data. This report covers a consolidated list of the suspect stations for the period January to June 2006. The locations of the suspect stations are shown in Figure1 and diagrams of the residuals for each of station are in Figures 2-4.
As part of WMO responsibilities as a WMC, copies of this report are made available to major GDPS Centres participating in data monitoring activities.
- Monitoring Methods
The decision as to whether a station is 'suspect' is from determination of the deviations of Mean Sea Level Pressure (MSLP) from the GASP first-guess fields (Observation minus Guess), hereafter called O-G. Deviations are accessed relative to the first guess fields.
To achieve more complete reporting profiles for the investigation of suspect stations, observations were not retrieved for statistical analysis until 24 hours after real-time, thus not all values used in such computations may have been available to the assimilation processing.
The selection criteria for deciding whether a station is suspect or not are as follows:
Number of observations (NOBS) >= 120, and one or more of the following:
1. the mean of O-G |BIAS| >= 3.0 hPa
2. the standard deviation of O-G SD >= 5.0 hPa
3. the percentage of gross errors PGE >= 25%
BIAS and SD are calculated excluding gross error data.
The complete criteria for quality control are given on the header page of Table 2. Stations which exhibited 100% gross errors for the 6 months are included, with asterisks substituted for their poorly defined statistical measures.
- Monitoring Results
Table 1 contains a list of synoptic stations, which are considered to have reported suspect observations of mean sea level pressure (MSLP) during the 6 months.WMO REGION 5 STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS 91336 6.9 152.7 1 ALL MSLP 188 0 0 2.1 3.2 3.9 96505 3.7 115.7 1020 ALL MSLP 120 1 1 2.8 11.7 12.0 97008 3.6 125.5 38 ALL MSLP 511 0 0 0.9 3.5 3.6
Table 1. List of land surface stations reporting suspect observations of mean sea level pressure over the period January to June 2006.
Table 2 details a Global coverage of synoptic stations, which are considered to have reported suspect observations of mean sea level pressure (MSLP) during the 6 months.
Table 2
MONITORING OF SURFACE DATA
SUSPECT LIST
MONITORING CENTRE: MELBOURNE
JANUARY to JUNE 2006
********************
MONITORING PROCEDURES :-
PERIOD : SIX CALENDAR MONTHS
DATA MONITORED : REPORTS FROM EACH UNIQUE IDENTIFIER
FOR SYNOP
AREA : FULL GLOBAL
STANDARD OF COMPARISON : +6H FIRST GUESS FIELD FROM THE AUSTRALIAN GLOBAL
ASSIMILATION PREDICTION (GASP) MODEL
OBSERVATION TIMES : 00, 06, 12, 18 UTC
ELEMENT MONITORED : MSLP - MEAN SEA LEVEL PRESSURE (hPa)
PARAMETERS MONITORED :-
NOBS : NUMBER OF OBSERVATIONS RECEIVED (WITH FIRST
GUESS AVAILABLE) EXCLUDING DUPLICATES
NGE : NUMBER OF OBSERVATIONS WITH GROSS ERRORS
PGE : PERCENTAGE OF OBSERVATIONS WITH GROSS ERRORS
SD : STANDARD DEVIATION OF DIFFERENCE BETWEEN
OBSERVATIONS AND BACKGROUND FIELD
EXCLUDING OBSERVATIONS WITH GROSS ERRORS
BIAS : MEAN OF DIFFERENCE BETWEEN
OBSERVATIONS AND BACKGROUND FIELD
EXCLUDING OBSERVATIONS WITH GROSS ERRORS
RMS : ROOT MEAN SQUARE OF DIFFERENCE BETWEEN
OBSERVATIONS AND BACKGROUND FIELD
EXCLUDING OBSERVATIONS WITH GROSS ERRORS
GROSS ERROR LIMIT : 15.0 hPa
SELECTION CRITERIA : NOBS >= 120 AND ONE OR MORE OF THE FOLLOWING:
1. |BIAS| >= 3.0hPa
2. SD >= 5.0hPa
3. PGE >= 25%
LIST OF SUSPECT LAND SURFACE STATIONS FOR JAN to JUN 2006
-----------------------------------------------------------
WMO REGION 1
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
62760 13.6 25.3 730 ALL MSLP 268 0 0 1.5 -3.2 3.6
62803 11.9 31.0 885 ALL MSLP 318 0 0 1.7 -3.2 3.7
63330 13.5 39.5 2070 ALL MSLP 287 88 31 2.3 11.9 12.1
63333 11.1 39.7 1903 ALL MSLP 415 3 1 2.1 4.3 4.8
63402 7.7 36.8 1725 ALL MSLP 295 39 13 3.1 -9.7 10.2
63478 5.9 43.6 295 ALL MSLP 188 0 0 1.9 5.7 6.0
63671 1.8 40.1 244 ALL MSLP 658 2 0 1.6 -5.4 5.6
WMO REGION 2
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
28666 55.3 67.3 140 ALL MSLP 717 2 0 2.7 3.4 4.4
31137 56.3 131.1 850 ALL MSLP 712 3 0 4.6 3.6 5.9
38944 37.5 69.4 448 ALL MSLP 572 6 1 2.7 -7.0 7.5
40700 39.7 48.1 45 ALL MSLP 663 0 0 1.7 -4.9 5.1
40739 36.4 55.0 1345 ALL MSLP 666 0 0 2.8 -3.4 4.4
40740 37.1 58.5 1287 ALL MSLP 671 0 0 2.2 -3.4 4.0
40754 35.7 51.3 1191 ALL MSLP 667 2 0 2.8 -4.5 5.3
40757 35.5 53.4 1171 ALL MSLP 670 0 0 3.0 -4.3 5.3
40789 33.8 55.1 845 ALL MSLP 659 0 0 2.8 -3.6 4.6
40791 33.6 56.9 711 ALL MSLP 644 0 0 2.6 -3.4 4.3
40800 32.6 51.7 1590 ALL MSLP 672 1 0 2.9 -3.6 4.6
40818 31.2 52.7 2004 ALL MSLP 651 0 0 3.3 -3.3 4.6
40835 30.4 50.8 738 ALL MSLP 644 0 0 1.8 -3.4 3.8
40854 29.1 58.5 940 ALL MSLP 648 2 0 2.6 -5.5 6.1
41530 34.0 71.6 360 ALL MSLP 514 0 0 2.9 -3.8 4.8
44212 49.8 92.1 936 ALL MSLP 715 65 9 5.4 3.4 6.4
44213 49.7 94.4 1232 ALL MSLP 719 17 2 5.1 2.8 5.8
44221 49.7 96.4 1420 ALL MSLP 712 22 3 4.8 3.4 5.9
44224 48.8 90.1 1928 ALL MSLP 691 47 7 6.6 0.5 6.6
44225 48.7 98.3 1723 ALL MSLP 714 71 10 5.3 3.3 6.3
44231 49.6 100.2 1288 ALL MSLP 717 3 0 4.1 -3.1 5.1
44263 46.9 91.1 1951 ALL MSLP 708 19 3 4.9 3.6 6.0
44275 46.8 98.1 2255 ALL MSLP 715 14 2 5.5 0.3 5.5
44284 46.7 100.1 2117 ALL MSLP 715 12 2 5.3 2.3 5.8
47020 41.0 126.6 306 ALL MSLP 654 201 31 2.9 1.4 3.2
48920 8.6 111.9 3 ALL MSLP 602 0 0 2.6 3.8 4.6
48952 15.7 106.4 168 ALL MSLP 276 0 0 1.5 -4.3 4.5
48957 14.8 106.8 105 ALL MSLP 200 0 0 1.3 3.4 3.6
51709 39.5 76.0 1291 ALL MSLP 723 5 1 5.6 -2.0 5.9
51811 38.4 77.3 1232 ALL MSLP 724 13 2 6.0 -1.0 6.1
51818 37.6 78.3 1376 ALL MSLP 720 13 2 6.3 -0.5 6.3
51828 37.1 79.9 1375 ALL MSLP 724 5 1 5.1 -1.3 5.2
52652 38.9 100.4 1483 ALL MSLP 724 9 1 4.6 3.4 5.7
53192 44.0 114.9 1128 ALL MSLP 724 0 0 2.5 3.0 3.9
53352 41.7 110.4 1377 ALL MSLP 720 0 0 2.8 3.2 4.3
56287 30.0 103.0 629 ALL MSLP 724 1 0 3.2 4.2 5.2
56763 25.7 101.9 1120 ALL MSLP 724 0 0 3.4 -3.1 4.6
WMO REGION 3
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
80315 3.0 -75.3 443 ALL MSLP 210 0 0 2.0 -4.1 4.6
82287 -2.9 -41.6 22 ALL MSLP 330 0 0 0.8 -4.0 4.1
82353 -3.2 -52.2 74 ALL MSLP 531 0 0 1.0 -3.5 3.7
82586 -5.2 -39.3 212 ALL MSLP 532 0 0 1.2 -3.1 3.4
82704 -7.6 -72.7 170 ALL MSLP 533 0 0 1.4 -4.9 5.1
83264 -12.2 -56.5 415 ALL MSLP 527 1 0 1.2 3.2 3.4
83388 -15.1 -42.8 604 ALL MSLP 535 0 0 1.3 -4.2 4.3
83405 -16.0 -57.7 118 ALL MSLP 517 1 0 1.5 -3.1 3.4
83538 -18.2 -43.6 1297 ALL MSLP 534 0 0 1.2 -3.1 3.3
83738 -22.5 -44.5 440 ALL MSLP 497 0 0 1.8 -4.7 5.1
83970 -31.3 -50.9 5 ALL MSLP 445 0 0 1.3 -5.6 5.7
84132 -0.9 -75.4 215 ALL MSLP 169 168 99 0.0 -8.8 8.8
84135 -1.0 -80.4 60 ALL MSLP 215 0 0 1.2 -4.2 4.3
84390 -4.6 -81.3 90 ALL MSLP 134 0 0 1.5 3.4 3.7
84401 -5.2 -80.6 55 ALL MSLP 651 3 0 2.0 3.0 3.7
84425 -5.9 -76.1 184 ALL MSLP 130 0 0 1.7 5.1 5.4
84452 -6.8 -79.8 34 ALL MSLP 625 0 0 1.6 4.8 5.0
84455 -6.5 -76.4 282 ALL MSLP 475 2 0 2.0 6.0 6.4
84501 -8.1 -79.0 30 ALL MSLP 484 0 0 1.6 3.4 3.7
84720 -14.9 -74.9 567 ALL MSLP 322 0 0 1.4 4.8 5.0
87222 -28.6 -65.8 454 ALL MSLP 710 0 0 2.3 -3.7 4.4
87418 -32.8 -68.8 704 ALL MSLP 684 2 0 3.3 -3.5 4.8
WMO REGION 4
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
71023 54.9 -110.0 637 ALL MSLP 676 94 14 5.6 -0.5 5.6
71319 47.3 -70.6 718 ALL MSLP 226 0 0 1.5 -3.2 3.5
71684 50.1 -122.9 1632 ALL MSLP 715 0 0 2.5 -4.4 5.1
71686 50.1 -123.0 907 ALL MSLP 717 0 0 2.1 -4.4 4.9
71746 43.0 -82.3 181 ALL MSLP 720 181 25 7.3 -0.4 7.3
71826 66.2 -65.7 32 ALL MSLP 717 0 0 1.8 -3.4 3.9
72370 35.3 -113.9 1033 ALL MSLP 694 0 0 2.9 -3.3 4.4
72375 35.1 -11.2 2139 ALL MSLP 684 45 7 6.5 -1.9 6.7
72462 37.4 -105.9 2299 ALL MSLP 716 2 0 6.2 -0.5 6.2
72464 38.3 -104.5 1439 ALL MSLP 686 0 0 5.1 -2.9 5.8
72476 39.1 -108.5 1475 ALL MSLP 716 0 0 4.4 -3.4 5.5
72565 39.9 -104.7 1656 ALL MSLP 721 1 0 4.7 -3.1 5.7
72576 42.8 -108.7 1694 ALL MSLP 709 0 0 4.5 -3.2 5.5
76055 31.0 -114.8 440 ALL MSLP 376 0 0 1.9 -3.6 4.1
76113 30.7 -111.7 419 ALL MSLP 272 0 0 1.7 -3.2 3.6
76220 29.0 -107.8 1932 ALL MSLP 526 70 13 4.1 7.2 8.3
76382 25.5 -103.4 1124 ALL MSLP 537 1 0 4.7 -3.1 5.6
76423 24.0 -104.7 1872 ALL MSLP 580 4 1 4.6 -3.8 6.0
76471 23.6 -103.6 2359 ALL MSLP 477 0 0 4.0 -3.5 5.4
76525 22.8 -102.6 2612 ALL MSLP 588 1 0 5.0 -1.6 5.3
76625 20.6 -100.4 1880 ALL MSLP 193 0 0 3.0 -5.5 6.3
76632 20.1 -98.7 2417 ALL MSLP 214 0 0 3.8 -3.6 5.3
76634 20.1 -98.4 2181 ALL MSLP 235 0 0 2.9 3.8 4.8
76658 19.2 -103.7 494 ALL MSLP 124 0 0 1.8 4.0 4.4
76680 19.4 -99.2 2303 ALL MSLP 326 0 0 2.7 -6.2 6.8
76685 19.0 -98.2 2179 ALL MSLP 512 0 0 3.7 -4.3 5.7
76726 18.9 -99.2 1618 ALL MSLP 330 2 1 4.2 -5.2 6.7
76775 17.1 -96.7 1550 ALL MSLP 402 0 0 2.9 -3.3 4.4
76848 16.3 -92.1 1646 ALL MSLP 390 0 0 1.8 -4.5 4.9
78588 17.2 -87.5 1 ALL MSLP 721 721 100 ** ** **
WMO REGION 5
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
91336 6.9 152.7 1 ALL MSLP 188 0 0 2.1 3.2 3.9
96505 3.7 115.7 1020 ALL MSLP 120 1 1 2.8 11.7 12.0
97008 3.6 125.5 38 ALL MSLP 511 0 0 0.9 3.5 3.6
WMO REGION 6
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
04270 61.2 -45.4 32 ALL MSLP 703 0 0 2.7 -3.1 4.1
04330 74.3 -20.2 44 ALL MSLP 662 0 0 1.8 -6.6 6.9
08226 40.7 -3.2 640 ALL MSLP 332 0 0 2.7 -4.7 5.4
11137 47.4 12.9 810 ALL MSLP 692 0 0 2.4 3.2 4.0
40030 35.1 36.8 303 ALL MSLP 590 1 0 1.5 -3.9 4.1
WMO REGION ANTARCTICA
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
89263 -66.0 -66.1 20 ALL MSLP 449 71 16 5.8 4.7 7.4
89272 -74.8 -70.5 1395 ALL MSLP 126 118 94 1.7 -12.4 12.4
89512 -70.8 11.8 102 ALL MSLP 715 6 1 2.3 -4.1 4.7
89514 -70.8 11.7 117 ALL MSLP 645 4 1 2.2 -4.2 4.8
89592 -66.6 93.0 35 ALL MSLP 716 1 0 2.8 -3.7 4.6
89642 -66.7 140.0 41 ALL MSLP 681 3 0 3.2 -5.5 6.4
