Report
on the Quality of Land Surface Observations
in Region V
July to
December 2003
Report No. 14
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 July to December 2003. The locations of the suspect stations are shown in Figure1 and diagrams of the residuals for each of station are in Figures 2-5.
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 96753 -6.5 106.8 250 ALL MSLP 212 0 0 1.6 4.9 5.1 96947 -8.0 112.7 526 ALL MSLP 145 0 0 1.4 4.0 4.2 97378 -10.7 123.1 1 ALL MSLP 261 229 88 1.5 -14.1 14.2 98132 20.8 121.8 124 ALL MSLP 685 2 0 1.6 3.2 3.6
Table 1. List of land surface stations reporting suspect observations of mean sea level pressure over the period July to December 2003.
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
JULY to DECEMBER 2003
*********************
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 JUL to DEC 2003
-----------------------------------------------------------
WMO REGION 1
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
61492 16.1 -13.5 18 ALL MSLP 372 0 0 1.5 4.2 4.4
61829 10.4 -9.3 384 ALL MSLP 171 0 0 1.4 3.4 3.6
62271 24.2 23.3 436 ALL MSLP 313 1 0 1.6 3.4 3.8
62733 15.3 35.6 451 ALL MSLP 219 0 0 2.3 3.2 3.9
62751 14.4 33.5 408 ALL MSLP 232 0 0 2.5 3.3 4.1
62781 12.7 28.4 564 ALL MSLP 240 0 0 2.3 3.4 4.1
62790 12.1 24.9 674 ALL MSLP 228 0 0 2.7 3.3 4.2
62810 11.0 29.7 499 ALL MSLP 154 0 0 2.7 3.6 4.5
62840 9.6 31.6 388 ALL MSLP 228 0 0 2.1 3.5 4.1
64108 -3.3 17.4 324 ALL MSLP 143 0 0 1.7 4.9 5.2
64222 -5.0 18.8 449 ALL MSLP 192 0 0 1.7 6.5 6.7
64228 -6.4 20.9 481 ALL MSLP 194 0 0 2.1 4.2 4.7
64650 4.4 18.5 366 ALL MSLP 308 0 0 1.5 3.5 3.9
64654 8.4 20.6 511 ALL MSLP 137 0 0 2.1 8.4 8.6
64655 6.5 22.0 584 ALL MSLP 155 0 0 1.8 3.6 4.0
64656 4.7 22.8 500 ALL MSLP 156 0 0 1.6 3.7 4.0
64662 5.1 21.2 449 ALL MSLP 121 0 0 1.5 4.7 4.9
64750 9.1 18.4 365 ALL MSLP 518 0 0 2.7 3.5 4.4
64754 11.0 20.3 436 ALL MSLP 235 0 0 2.9 4.1 5.0
64860 9.3 13.4 244 ALL MSLP 417 1 0 1.7 3.1 3.6
65404 10.1 -2.5 323 ALL MSLP 514 0 0 1.2 3.2 3.4
65416 9.0 -2.5 301 ALL MSLP 168 0 0 1.2 3.6 3.8
65418 9.5 -0.9 173 ALL MSLP 224 0 0 1.2 4.3 4.5
65432 7.8 -2.1 340 ALL MSLP 167 0 0 1.3 3.1 3.4
67241 -15.0 40.7 11 ALL MSLP 333 1 0 1.3 -3.3 3.5
68016 -19.3 12.7 0 ALL MSLP 230 3 1 1.8 3.4 3.8
WMO REGION 2
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
24688 63.3 143.1 741 ALL MSLP 730 95 13 5.0 1.9 5.4
40700 39.7 48.1 45 ALL MSLP 669 0 0 1.6 -3.8 4.1
40726 36.8 45.7 1385 ALL MSLP 636 1 0 2.6 3.9 4.7
40741 36.5 61.2 236 ALL MSLP 657 0 0 1.9 -4.2 4.6
44215 49.1 91.7 1591 ALL MSLP 707 35 5 5.1 0.2 5.1
44217 48.3 89.5 2148 ALL MSLP 125 19 15 5.6 4.4 7.1
44218 48.0 91.7 1406 ALL MSLP 720 37 5 5.5 -0.8 5.5
44224 48.8 90.1 1928 ALL MSLP 141 56 40 8.1 1.6 8.2
44225 48.7 98.3 1723 ALL MSLP 723 103 14 4.8 3.2 5.8
44230 49.6 102.0 1236 ALL MSLP 713 7 1 3.8 3.6 5.2
44232 49.4 102.7 933 ALL MSLP 718 21 3 4.1 3.2 5.2
44265 46.1 91.6 1186 ALL MSLP 696 86 12 3.4 7.5 8.2
44266 46.3 93.9 2222 ALL MSLP 140 1 1 5.3 3.5 6.3
44272 47.8 96.8 1753 ALL MSLP 723 5 1 5.6 0.3 5.6
44275 46.8 98.1 2255 ALL MSLP 720 60 8 5.5 3.0 6.3
44277 46.4 96.3 2147 ALL MSLP 720 4 1 5.0 0.2 5.0
44284 46.7 100.1 2117 ALL MSLP 725 126 17 5.1 4.8 7.0
44285 46.9 102.8 1655 ALL MSLP 725 19 3 4.5 3.7 5.9
44286 47.2 104.2 1357 ALL MSLP 124 3 2 4.2 5.0 6.5
44325 44.9 96.8 1183 ALL MSLP 136 1 1 5.6 4.2 7.0
44336 45.5 103.9 1316 ALL MSLP 670 16 2 3.9 4.6 6.1
48952 15.7 106.4 168 ALL MSLP 231 0 0 1.6 -3.2 3.6
51156 46.8 85.7 1294 ALL MSLP 735 0 0 2.2 3.0 3.7
51379 44.0 89.6 794 ALL MSLP 699 0 0 3.1 3.1 4.4
51495 43.2 91.7 732 ALL MSLP 706 21 3 2.5 7.6 8.0
51818 37.6 78.3 1376 ALL MSLP 709 0 0 3.2 3.4 4.6
52436 40.3 97.0 1527 ALL MSLP 702 0 0 3.4 3.0 4.5
52495 40.8 104.5 1329 ALL MSLP 736 0 0 2.4 3.9 4.5
52533 39.8 98.5 1478 ALL MSLP 734 1 0 3.2 3.6 4.8
52652 38.9 100.4 1483 ALL MSLP 736 3 0 3.5 3.9 5.2
53083 44.6 114.2 1183 ALL MSLP 702 0 0 2.3 3.2 4.0
53192 44.0 114.9 1128 ALL MSLP 736 0 0 2.4 4.1 4.8
53336 41.6 108.5 1290 ALL MSLP 735 0 0 2.0 3.8 4.3
53352 41.7 110.4 1377 ALL MSLP 702 0 0 2.0 3.3 3.9
53391 41.9 114.0 1484 ALL MSLP 736 1 0 1.9 3.5 4.0
53480 41.0 113.1 1416 ALL MSLP 689 0 0 2.1 3.7 4.3
54208 42.2 116.5 1247 ALL MSLP 736 1 0 2.5 3.3 4.2
56287 30.0 103.0 629 ALL MSLP 734 0 0 1.8 3.8 4.1
WMO REGION 3
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
82287 -2.9 -41.6 22 ALL MSLP 540 0 0 0.8 -3.1 3.2
82353 -3.2 -52.2 74 ALL MSLP 527 0 0 1.2 -3.7 3.9
82571 -5.5 -45.3 153 ALL MSLP 532 0 0 1.0 3.1 3.3
82765 -7.3 -47.5 193 ALL MSLP 534 0 0 1.3 4.5 4.6
83319 -14.7 -52.3 315 ALL MSLP 531 0 0 1.5 5.0 5.2
83726 -22.0 -47.9 856 ALL MSLP 336 1 0 1.8 3.1 3.6
83738 -22.5 -44.5 440 ALL MSLP 340 51 15 3.7 -8.9 9.7
84390 -4.6 -81.3 90 ALL MSLP 152 0 0 1.4 4.9 5.1
84401 -5.2 -80.6 55 ALL MSLP 709 0 0 1.5 5.6 5.8
84425 -5.9 -76.1 184 ALL MSLP 230 1 0 2.1 6.4 6.7
84452 -6.8 -79.8 34 ALL MSLP 678 0 0 1.6 4.5 4.8
84455 -6.4 -76.4 282 ALL MSLP 533 1 0 1.9 9.4 9.6
84501 -8.1 -79.0 30 ALL MSLP 539 0 0 1.7 5.3 5.6
84531 -9.2 -78.5 21 ALL MSLP 149 0 0 1.4 3.6 3.9
84628 -12.0 -77.1 13 ALL MSLP 702 0 0 1.6 3.8 4.2
84720 -14.9 -74.9 567 ALL MSLP 349 0 0 2.1 6.3 6.6
84773 -17.7 -71.3 9 ALL MSLP 141 0 0 1.2 4.8 4.9
84782 -18.1 -70.3 458 ALL MSLP 568 0 0 1.9 8.3 8.5
85041 -11.0 -68.8 235 ALL MSLP 349 1 0 2.1 7.1 7.4
85210 -16.3 -58.4 124 ALL MSLP 342 0 0 1.7 3.2 3.6
85365 -22.0 -63.7 645 ALL MSLP 319 0 0 3.0 3.9 4.9
85394 -22.8 -64.3 381 ALL MSLP 259 1 0 3.4 3.1 4.6
85406 -18.4 -70.3 55 ALL MSLP 714 0 0 2.1 5.6 6.0
85418 -20.5 -70.2 48 ALL MSLP 713 0 0 1.5 4.0 4.3
85442 -23.4 -70.4 140 ALL MSLP 722 2 0 1.6 3.0 3.4
87222 -28.6 -65.8 454 ALL MSLP 710 1 0 2.2 -3.5 4.1
87904 -50.3 -72.1 204 ALL MSLP 719 245 34 4.4 1.6 4.7
WMO REGION 4
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
71023 65.9 -89.4 18 ALL MSLP 733 101 14 7.3 1.6 7.4
71048 61.6 -125.8 610 ALL MSLP 635 0 0 2.9 4.9 5.7
71060 65.6 -118.1 230 ALL MSLP 725 68 9 6.8 2.1 7.1
71786 51.5 -116.3 1615 ALL MSLP 733 1 0 3.1 4.0 5.0
72374 35.0 -110.7 1488 ALL MSLP 720 0 0 3.1 3.7 4.8
72375 35.1 -11.2 2139 ALL MSLP 723 38 5 6.0 -1.3 6.1
72376 36.2 -111.8 2181 ALL MSLP 710 2 0 4.6 5.3 7.0
72462 37.4 -105.9 2299 ALL MSLP 724 12 2 4.6 6.5 8.0
72475 38.4 -113.0 1536 ALL MSLP 718 0 0 3.7 3.9 5.4
72486 39.3 -114.8 1909 ALL MSLP 706 0 0 3.8 3.7 5.3
72564 41.2 -104.8 1872 ALL MSLP 710 2 0 4.0 3.2 5.1
72570 40.5 -107.5 1915 ALL MSLP 714 0 0 4.1 6.8 7.9
72576 42.8 -108.7 1694 ALL MSLP 721 0 0 4.7 3.1 5.6
72578 42.9 -112.6 1365 ALL MSLP 707 0 0 4.0 4.0 5.6
72583 40.9 -117.8 1322 ALL MSLP 721 0 0 3.4 3.3 4.8
72772 46.6 -112.0 1188 ALL MSLP 707 0 0 3.2 3.1 4.4
76220 29.0 -107.8 1932 ALL MSLP 235 64 27 2.9 9.8 10.2
76225 28.6 -106.1 1435 ALL MSLP 424 1 0 4.5 -4.6 6.4
76323 26.9 -105.7 1661 ALL MSLP 442 7 2 3.6 5.3 6.4
76625 20.6 -100.4 1880 ALL MSLP 195 0 0 2.4 -3.4 4.1
76634 20.1 -98.4 2181 ALL MSLP 227 0 0 2.1 5.5 5.9
76658 19.2 -103.7 494 ALL MSLP 152 0 0 1.1 5.0 5.1
76687 19.5 -96.9 1389 ALL MSLP 600 0 0 1.6 4.1 4.4
76762 17.5 -99.5 1265 ALL MSLP 383 0 0 2.1 3.8 4.4
76843 16.8 -93.1 528 ALL MSLP 457 0 0 1.3 5.8 5.9
76848 16.3 -92.1 1646 ALL MSLP 394 0 0 1.7 -3.5 3.9
76903 14.9 -92.3 118 ALL MSLP 395 0 0 1.3 6.0 6.2
78588 17.2 -87.5 1 ALL MSLP 727 642 88 0.8 0.4 0.9
WMO REGION 5
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
96753 -6.5 106.8 250 ALL MSLP 212 0 0 1.6 4.9 5.1
96947 -8.0 112.7 526 ALL MSLP 145 0 0 1.4 4.0 4.2
97378 -10.7 123.1 1 ALL MSLP 261 229 88 1.5 -14.1 14.2
98132 20.8 121.8 124 ALL MSLP 685 2 0 1.6 3.2 3.6
WMO REGION 6
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
17042 41.4 41.4 33 ALL MSLP 642 0 0 3.3 4.3 5.4
WMO REGION ANTARCTICA
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
89250 -62.1 -58.4 267 ALL MSLP 354 2 1 2.9 -4.5 5.4
89253 -63.2 -55.4 75 ALL MSLP 345 1 0 3.8 3.6 5.2
89263 -66.0 -66.1 20 ALL MSLP 715 297 42 9.2 2.0 9.4
89512 -70.8 11.8 102 ALL MSLP 733 4 1 3.2 -3.8 5.0
89642 -66.7 140.0 41 ALL MSLP 709 0 0 3.0 -3.2 4.4
