Report
on the Quality of Land Surface Observations
in Region V
January
to June 2003
Report No. 13
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 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 126 0 0 0.9 5.2 5.3 97008 3.6 125.5 38 ALL MSLP 434 0 0 1.0 3.1 3.3 97378 -10.7 123.1 1 ALL MSLP 139 125 90 0.3 -14.5 14.5 98553 11.6 125.4 7 ALL MSLP 669 0 0 2.9 -3.5 4.6
Table 1. List of land surface stations reporting suspect observations of mean sea level pressure over the period January to June 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
JANUARY TO JUNE 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 JAN to JUN 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 329 0 0 1.7 4.0 4.3
62271 24.2 23.3 436 ALL MSLP 274 1 0 1.8 3.9 4.3
62770 13.5 22.5 805 ALL MSLP 207 0 0 2.0 3.5 4.0
63160 10.4 45.0 9 ALL MSLP 167 1 1 2.4 -3.0 3.9
64108 -3.3 17.4 324 ALL MSLP 167 0 0 2.1 4.2 4.7
64222 -5.0 18.8 449 ALL MSLP 181 0 0 2.5 5.4 6.0
64228 -6.4 20.9 481 ALL MSLP 157 0 0 2.3 3.6 4.2
64650 4.4 18.5 366 ALL MSLP 251 0 0 1.9 3.5 4.0
64654 8.4 20.6 511 ALL MSLP 188 0 0 2.2 3.1 3.8
64655 6.5 22.0 584 ALL MSLP 210 0 0 1.8 3.3 3.8
64656 4.7 22.8 500 ALL MSLP 158 0 0 1.9 3.6 4.1
64662 5.1 21.2 449 ALL MSLP 250 0 0 2.2 3.6 4.2
65416 9.0 -2.5 301 ALL MSLP 306 0 0 1.3 3.5 3.8
65418 9.5 -0.9 173 ALL MSLP 139 0 0 1.3 3.8 4.0
67241 -15.0 40.7 11 ALL MSLP 224 0 0 1.2 -3.2 3.4
67308 -22.1 31.7 453 ALL MSLP 121 120 99 0.0 0.5 0.5
68016 -19.3 12.7 0 ALL MSLP 295 0 0 1.7 3.4 3.8
WMO REGION 2
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
24671 64.0 135.9 402 ALL MSLP 511 2 0 4.3 4.5 6.2
24688 63.3 143.1 741 ALL MSLP 709 122 17 6.1 3.2 6.9
30967 49.9 115.8 623 ALL MSLP 224 1 0 2.6 -7.6 8.0
31137 56.3 131.1 850 ALL MSLP 687 14 2 5.4 2.8 6.1
36096 51.7 94.5 628 ALL MSLP 698 42 6 5.5 1.5 5.7
36859 44.2 80.1 645 ALL MSLP 700 3 0 2.9 -3.2 4.3
40700 39.7 48.1 45 ALL MSLP 540 2 0 1.8 -3.9 4.3
40726 36.8 45.7 1385 ALL MSLP 494 0 0 2.6 3.8 4.5
40741 36.5 61.2 236 ALL MSLP 488 0 0 2.4 -4.1 4.8
40836 30.8 51.7 1880 ALL MSLP 491 1 0 2.5 3.6 4.4
41396 16.0 49.0 700 ALL MSLP 261 2 1 1.5 3.6 3.9
44203 51.1 99.7 1583 ALL MSLP 685 122 18 5.4 3.7 6.6
44207 50.4 100.2 1687 ALL MSLP 687 23 3 4.7 4.5 6.5
44212 49.8 92.1 936 ALL MSLP 691 188 27 5.8 3.1 6.6
44213 49.7 94.4 1232 ALL MSLP 697 164 24 5.9 2.9 6.5
44215 49.1 91.7 1591 ALL MSLP 689 53 8 5.9 0.7 6.0
44218 48.0 91.7 1406 ALL MSLP 696 60 9 6.3 -0.7 6.3
44225 48.7 98.3 1723 ALL MSLP 692 205 30 5.6 2.5 6.2
44230 49.6 102.0 1236 ALL MSLP 696 9 1 4.4 4.1 6.0
44231 49.6 100.2 1288 ALL MSLP 690 26 4 5.1 2.2 5.6
44232 49.4 102.7 933 ALL MSLP 695 23 3 5.0 3.6 6.2
44265 46.1 91.6 1186 ALL MSLP 681 111 16 3.8 7.3 8.2
44272 47.8 96.8 1753 ALL MSLP 695 35 5 6.5 0.9 6.6
44275 46.8 98.1 2255 ALL MSLP 696 60 9 5.6 2.0 5.9
44277 46.4 96.3 2147 ALL MSLP 697 2 0 5.6 -2.1 6.0
44284 46.7 100.1 2117 ALL MSLP 695 168 24 5.4 4.6 7.1
44287 46.1 100.7 1860 ALL MSLP 698 9 1 4.8 3.3 5.9
44336 45.5 103.9 1316 ALL MSLP 663 0 0 4.0 3.5 5.3
48957 14.8 106.8 105 ALL MSLP 130 0 0 1.9 3.1 3.6
51334 44.6 82.9 321 ALL MSLP 674 0 0 3.4 3.1 4.6
51379 44.0 89.6 794 ALL MSLP 676 0 0 4.0 3.7 5.4
51495 43.2 91.7 732 ALL MSLP 671 89 13 3.3 6.7 7.5
51573 42.9 89.2 37 ALL MSLP 714 5 1 5.5 -1.3 5.6
51709 39.5 76.0 1291 ALL MSLP 714 0 0 5.2 1.0 5.3
51747 39.0 83.7 1099 ALL MSLP 715 3 0 5.0 -1.9 5.4
51777 39.0 88.2 889 ALL MSLP 715 5 1 5.0 -2.6 5.7
52203 42.8 93.5 739 ALL MSLP 714 1 0 5.0 -0.4 5.0
52418 40.2 94.7 1140 ALL MSLP 716 2 0 5.1 -0.8 5.2
53083 44.6 114.2 1183 ALL MSLP 677 2 0 3.3 3.5 4.8
53192 44.0 114.9 1128 ALL MSLP 716 5 1 3.6 4.5 5.7
53336 41.6 108.5 1290 ALL MSLP 716 0 0 2.9 3.2 4.3
53352 41.7 110.4 1377 ALL MSLP 675 0 0 3.1 3.4 4.6
53391 41.9 114.0 1484 ALL MSLP 716 0 0 2.6 3.0 4.0
53480 41.0 113.1 1416 ALL MSLP 678 0 0 2.5 3.4 4.2
54208 42.2 116.5 1247 ALL MSLP 716 1 0 3.4 3.4 4.8
56096 33.4 104.9 1079 ALL MSLP 716 0 0 2.5 -3.0 4.0
56763 25.7 101.9 1120 ALL MSLP 711 0 0 2.3 -3.5 4.2
WMO REGION 3
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
80099 7.1 -70.7 128 ALL MSLP 204 1 0 1.8 -6.4 6.6
80315 3.0 -75.3 443 ALL MSLP 479 0 0 2.0 -4.1 4.6
82287 -2.9 -41.6 22 ALL MSLP 513 1 0 0.9 -3.2 3.3
82353 -3.2 -52.2 74 ALL MSLP 477 0 0 1.4 -3.3 3.6
82765 -7.3 -47.5 193 ALL MSLP 519 0 0 1.4 3.1 3.4
82861 -8.3 -49.3 157 ALL MSLP 478 0 0 1.4 -3.1 3.4
83319 -14.7 -52.3 315 ALL MSLP 509 0 0 1.3 3.4 3.6
84390 -4.6 -81.3 90 ALL MSLP 124 2 2 1.1 4.8 4.9
84401 -5.2 -80.6 55 ALL MSLP 617 0 0 1.6 5.0 5.2
84425 -5.9 -76.1 184 ALL MSLP 433 2 0 1.9 5.2 5.5
84452 -6.8 -79.8 34 ALL MSLP 590 0 0 1.5 4.0 4.3
84455 -6.4 -76.4 282 ALL MSLP 415 1 0 2.1 8.0 8.2
84501 -8.1 -79.0 30 ALL MSLP 459 0 0 1.6 4.8 5.1
84628 -12.0 -77.1 13 ALL MSLP 579 0 0 1.4 3.5 3.7
84720 -14.9 -74.9 567 ALL MSLP 293 1 0 1.9 6.4 6.6
84773 -17.7 -71.3 9 ALL MSLP 122 0 0 1.4 4.1 4.4
84782 -18.1 -70.3 458 ALL MSLP 468 0 0 1.7 7.9 8.1
85041 -11.0 -68.8 235 ALL MSLP 329 0 0 2.2 6.7 7.0
85141 -14.5 -67.6 204 ALL MSLP 330 0 0 3.8 4.0 5.5
85268 -18.3 -59.8 276 ALL MSLP 318 0 0 1.6 3.1 3.5
85394 -22.8 -64.3 381 ALL MSLP 231 0 0 2.9 4.0 5.0
85406 -18.4 -70.3 55 ALL MSLP 710 0 0 1.8 5.5 5.8
85418 -20.5 -70.2 48 ALL MSLP 707 0 0 1.5 4.4 4.7
85442 -23.4 -70.4 140 ALL MSLP 708 0 0 1.5 3.4 3.7
85486 -28.6 -70.8 526 ALL MSLP 146 0 0 1.7 4.3 4.7
87904 -50.3 -72.1 204 ALL MSLP 701 346 49 7.0 5.7 9.0
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 713 174 24 7.5 -0.1 7.5
71048 61.6 -125.8 610 ALL MSLP 539 0 0 2.7 3.2 4.1
71060 65.6 -118.1 230 ALL MSLP 702 148 21 7.2 -2.5 7.6
71177 57.1 -61.5 834 ALL MSLP 237 0 0 1.9 -4.7 5.1
71179 54.7 -58.3 683 ALL MSLP 217 0 0 2.1 -4.1 4.6
71506 67.0 -136.2 720 ALL MSLP 699 0 0 2.3 -4.7 5.2
72375 35.1 -11.2 2139 ALL MSLP 709 34 5 6.0 -4.0 7.2
72570 40.5 -107.5 1915 ALL MSLP 710 7 1 3.9 3.7 5.4
76220 29.0 -107.8 1932 ALL MSLP 294 41 14 3.7 8.8 9.5
76243 28.7 -100.5 250 ALL MSLP 470 1 0 3.0 3.4 4.5
76323 26.9 -105.7 1661 ALL MSLP 393 4 1 4.0 4.5 6.0
76390 25.5 -101.0 1790 ALL MSLP 379 0 0 2.5 -3.0 3.9
76625 20.6 -100.4 1880 ALL MSLP 174 0 0 2.5 -3.7 4.5
76634 20.1 -98.4 2181 ALL MSLP 371 0 0 3.0 3.9 5.0
76658 19.2 -103.7 494 ALL MSLP 149 0 0 1.4 5.5 5.7
76680 19.4 -99.2 2303 ALL MSLP 137 0 0 2.8 -3.0 4.1
76685 19.0 -98.2 2179 ALL MSLP 468 0 0 3.4 -3.4 4.8
76687 19.5 -96.9 1389 ALL MSLP 546 0 0 1.8 3.3 3.7
76726 18.9 -99.2 1618 ALL MSLP 358 0 0 3.3 -3.2 4.6
76762 17.5 -99.5 1265 ALL MSLP 366 0 0 2.0 3.2 3.8
76773 17.8 -97.8 1680 ALL MSLP 120 0 0 3.0 3.1 4.3
76843 16.8 -93.1 528 ALL MSLP 439 1 0 1.4 5.8 6.0
76848 16.3 -92.1 1646 ALL MSLP 423 0 0 1.6 -3.8 4.2
76903 14.9 -92.3 118 ALL MSLP 409 0 0 1.6 6.0 6.2
78588 17.2 -87.5 1 ALL MSLP 705 306 43 1.0 0.1 1.0
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 126 0 0 0.9 5.2 5.3
97008 3.6 125.5 38 ALL MSLP 434 0 0 1.0 3.1 3.3
97378 -10.7 123.1 1 ALL MSLP 139 125 90 0.3 -14.5 14.5
98553 11.6 125.4 7 ALL MSLP 669 0 0 2.9 -3.5 4.6
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 709 0 0 3.3 3.4 4.7
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 184 0 0 3.0 -4.1 5.1
89263 -66.0 -66.1 20 ALL MSLP 179 11 6 6.1 5.2 8.0
89512 -70.8 11.8 102 ALL MSLP 706 1 0 2.6 -3.0 4.0
