Report
on the Quality of Land Surface Observations
in Region V
January-June 2010
Report No. 27
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-June 2010. The locations of the suspect stations are shown in Figure1 and diagrams of the residuals for each station are in Figures 2-6.
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 91434 1.1 154.8 3 ALL MSLP 299 0 0 0.8 3.8 3.8 91574 -20.0 158.5 4 ALL MSLP 724 227 31 8.5 -3.2 9.0 96207 -2.8 101.4 782 ALL MSLP 479 0 0 1.3 6.7 6.8 97780 -3.9 136.4 1770 ALL MSLP 186 152 82 1.2 14.2 14.3 98132 20.8 121.8 124 ALL MSLP 681 0 0 1.3 3.1 3.3
Table 1. List of land surface stations reporting suspect observations of mean sea level pressure over the period January-June 2010.
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 2010
********************
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 2010
-----------------------------------------------------------
WMO REGION 1
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
61099 11.9 3.5 203 ALL MSLP 697 0 0 1.6 -3.9 4.2
62730 15.5 36.4 500 ALL MSLP 395 0 0 1.7 3.1 3.5
62760 13.6 25.3 730 ALL MSLP 231 0 0 1.3 -3.3 3.5
63330 13.5 39.5 2070 ALL MSLP 227 193 85 3.4 12.8 13.3
63331 12.6 37.4 1967 ALL MSLP 184 99 54 2.1 12.9 13.1
63333 11.1 39.7 1903 ALL MSLP 359 0 0 2.1 4.3 4.8
63340 9.1 36.5 2080 ALL MSLP 399 0 0 2.6 8.0 8.5
63402 7.7 36.8 1725 ALL MSLP 155 3 2 2.2 -8.3 8.6
63478 5.9 43.6 295 ALL MSLP 143 1 1 1.5 5.0 5.2
67273 -16.2 39.9 62 ALL MSLP 121 0 0 0.8 -4.3 4.4
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 717 0 0 5.1 0.8 5.2
30650 53.2 112.8 923 ALL MSLP 724 1 0 3.6 -3.2 4.8
38944 37.5 69.4 448 ALL MSLP 700 1 0 2.4 -6.4 6.8
40754 35.7 51.3 1191 ALL MSLP 664 1 0 2.4 -4.4 5.0
40757 35.5 53.4 1171 ALL MSLP 500 0 0 2.6 -4.2 4.9
40789 33.8 55.1 921 ALL MSLP 503 0 0 2.1 -3.6 4.2
40791 33.6 56.9 711 ALL MSLP 495 0 0 2.3 -3.1 3.9
40792 34.0 58.2 1293 ALL MSLP 496 0 0 2.5 -3.2 4.1
40800 32.6 51.7 1590 ALL MSLP 647 0 0 2.6 -4.5 5.2
40818 31.2 52.7 2004 ALL MSLP 501 0 0 3.0 -3.7 4.8
40835 30.4 50.8 738 ALL MSLP 491 0 0 1.6 -3.6 3.9
40854 29.1 58.4 1067 ALL MSLP 490 1 0 2.3 -4.2 4.8
40859 29.0 53.7 1383 ALL MSLP 489 0 0 2.6 -3.2 4.1
41530 34.0 71.6 360 ALL MSLP 670 3 0 3.4 -3.4 4.8
42111 30.3 78.0 682 ALL MSLP 713 0 0 2.7 -3.3 4.3
44207 50.4 100.2 1687 ALL MSLP 723 4 1 5.5 2.9 6.2
44212 49.8 92.1 936 ALL MSLP 723 129 18 5.3 4.1 6.7
44213 49.7 94.4 1232 ALL MSLP 724 77 11 5.1 5.2 7.3
44215 49.1 91.7 1591 ALL MSLP 724 10 1 5.4 0.5 5.4
44218 48.0 91.7 1406 ALL MSLP 721 7 1 5.9 1.1 6.0
44224 48.8 90.1 1928 ALL MSLP 709 81 11 5.0 3.5 6.1
44225 48.7 98.3 1723 ALL MSLP 713 78 11 5.3 3.9 6.5
44265 46.1 91.6 1186 ALL MSLP 719 38 5 5.1 4.3 6.6
44272 47.8 96.8 1753 ALL MSLP 714 3 0 5.0 -0.9 5.1
44275 46.8 98.1 2255 ALL MSLP 716 10 1 5.3 0.6 5.4
44277 46.4 96.3 2147 ALL MSLP 724 55 8 5.4 4.1 6.8
44284 46.7 100.1 2117 ALL MSLP 718 53 7 4.7 5.4 7.1
44285 46.9 102.8 1655 ALL MSLP 723 1 0 4.0 3.1 5.1
44287 46.1 100.7 1860 ALL MSLP 722 3 0 4.4 3.1 5.4
44294 47.3 107.5 1427 ALL MSLP 724 11 2 3.7 4.0 5.4
44302 47.8 112.1 926 ALL MSLP 697 0 0 2.5 5.0 5.6
44336 45.5 103.9 1316 ALL MSLP 710 0 0 3.3 3.1 4.5
44352 45.7 112.4 1096 ALL MSLP 721 1 0 3.2 3.4 4.7
44416 28.6 81.6 720 ALL MSLP 224 15 7 5.1 -4.5 6.8
47075 38.4 127.3 371 ALL MSLP 691 47 7 3.3 -9.4 9.9
51087 47.0 89.5 827 ALL MSLP 720 1 0 3.5 3.3 4.8
51334 44.6 82.9 321 ALL MSLP 713 4 1 4.4 3.3 5.5
51379 44.0 89.6 794 ALL MSLP 712 3 0 3.7 4.3 5.6
51811 38.4 77.3 1232 ALL MSLP 722 1 0 5.0 -1.5 5.2
51818 37.6 78.3 1376 ALL MSLP 713 1 0 5.1 -1.3 5.3
51828 37.1 79.9 1375 ALL MSLP 722 4 1 5.0 -1.9 5.4
52652 38.9 100.4 1483 ALL MSLP 720 17 2 4.8 3.3 5.8
53192 44.0 114.9 1128 ALL MSLP 723 0 0 2.5 3.2 4.0
56287 30.0 103.0 629 ALL MSLP 720 3 0 3.4 4.5 5.6
56763 25.7 101.9 1120 ALL MSLP 721 0 0 2.8 -3.6 4.5
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 387 0 0 1.8 -4.3 4.7
80423 10.6 -62.3 14 ALL MSLP 337 2 1 1.2 -5.8 5.9
80434 9.2 -66.0 125 ALL MSLP 363 0 0 1.3 -5.6 5.8
82287 -2.9 -41.6 22 ALL MSLP 336 0 0 0.8 -3.8 3.9
82594 -5.1 -36.6 6 ALL MSLP 362 0 0 0.8 3.0 3.1
82704 -7.6 -72.7 170 ALL MSLP 522 0 0 1.8 -3.7 4.1
82789 -7.8 -38.1 1020 ALL MSLP 508 0 0 1.6 -7.9 8.1
83264 -12.2 -56.5 415 ALL MSLP 525 0 0 1.3 3.4 3.6
83388 -15.1 -42.8 604 ALL MSLP 538 1 0 1.3 -3.8 4.1
83574 -20.0 -48.9 543 ALL MSLP 285 0 0 1.5 8.0 8.2
84390 -4.6 -81.3 90 ALL MSLP 122 0 0 2.2 4.3 4.8
84401 -5.2 -80.6 55 ALL MSLP 533 0 0 2.0 5.6 6.0
84425 -5.9 -76.1 184 ALL MSLP 193 0 0 2.2 3.5 4.2
84455 -6.4 -76.4 282 ALL MSLP 390 0 0 2.0 4.9 5.3
85836 -43.6 -71.8 277 ALL MSLP 174 3 2 2.0 6.4 6.7
87418 -32.8 -68.8 704 ALL MSLP 694 1 0 3.2 -3.8 5.0
88986 -59.5 -27.3 27 ALL MSLP 475 338 71 4.8 8.7 9.9
WMO REGION 4
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
71177 57.1 -61.5 834 ALL MSLP 607 0 0 3.1 -3.3 4.5
71826 66.2 -65.7 32 ALL MSLP 722 0 0 1.8 -3.9 4.3
72370 35.3 -113.9 1033 ALL MSLP 714 0 0 2.6 -3.2 4.1
72375 35.1 -11.2 2139 ALL MSLP 717 83 12 6.7 -2.6 7.1
72462 37.4 -105.9 2299 ALL MSLP 716 2 0 5.8 -2.0 6.1
72464 38.3 -104.5 1439 ALL MSLP 708 2 0 4.9 -3.9 6.2
72476 39.1 -108.5 1475 ALL MSLP 716 0 0 3.9 -3.8 5.4
72565 39.9 -104.7 1656 ALL MSLP 719 0 0 4.8 -3.9 6.2
76113 30.7 -111.7 419 ALL MSLP 308 0 0 1.5 -4.0 4.3
76225 28.6 -106.1 1435 ALL MSLP 476 0 0 3.7 -3.3 5.0
76382 25.5 -103.4 1124 ALL MSLP 485 3 1 5.6 -1.4 5.7
76525 22.8 -102.6 2612 ALL MSLP 502 2 0 5.1 -0.4 5.1
76632 20.1 -98.7 2417 ALL MSLP 426 2 0 3.8 -3.8 5.3
76680 19.4 -99.2 2303 ALL MSLP 390 2 1 2.9 -6.6 7.2
76685 19.0 -98.2 2179 ALL MSLP 469 0 0 3.9 -3.6 5.3
76726 18.9 -99.2 1618 ALL MSLP 244 0 0 3.6 -4.2 5.6
76750 18.5 -88.3 9 ALL MSLP 491 0 0 1.1 -10.5 10.5
76762 17.5 -99.5 1865 ALL MSLP 410 0 0 1.8 -3.1 3.6
76773 17.8 -97.8 1680 ALL MSLP 423 0 0 3.9 -3.4 5.2
76775 17.1 -96.7 1550 ALL MSLP 469 0 0 3.3 -3.4 4.7
76833 16.2 -95.2 6 ALL MSLP 410 82 20 7.8 0.1 7.8
76848 16.3 -92.1 1646 ALL MSLP 495 0 0 2.1 -4.9 5.3
WMO REGION 5
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
91434 1.1 154.8 3 ALL MSLP 299 0 0 0.8 3.8 3.8
91574 -20.0 158.5 4 ALL MSLP 724 227 31 8.5 -3.2 9.0
96207 -2.8 101.4 782 ALL MSLP 479 0 0 1.3 6.7 6.8
97780 -3.9 136.4 1770 ALL MSLP 186 152 82 1.2 14.2 14.3
98132 20.8 121.8 124 ALL MSLP 681 0 0 1.3 3.1 3.3
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 721 0 0 2.6 -3.6 4.4
15533 43.6 25.4 26 ALL MSLP 724 0 0 1.7 -3.3 3.7
37531 42.0 44.1 590 ALL MSLP 715 1 0 2.3 3.1 3.9
37735 40.7 46.4 311 ALL MSLP 553 1 0 4.5 -6.1 7.6
37749 40.7 47.8 95 ALL MSLP 513 1 0 2.1 3.5 4.1
37756 40.5 48.9 755 ALL MSLP 516 2 0 2.7 5.1 5.8
WMO REGION ANTARCTICA
STN NO. LAT LONG HT(M) TIME ELEM NOBS NGE PGE SD BIAS RMS
88963 -63.4 -57.0 13 ALL MSLP 639 4 1 5.0 2.4 5.5
89004 -71.7 -2.8 817 ALL MSLP 685 8 1 2.8 -4.3 5.1
89269 -64.8 -64.1 8 ALL MSLP 337 43 13 5.5 0.8 5.6
89272 -75.0 -70.8 1395 ALL MSLP 685 574 84 2.9 -11.8 12.2
89332 -82.6 -137.1 549 ALL MSLP 155 0 0 4.2 -3.7 5.5
89345 -89.7 -148.8 620 ALL MSLP 654 635 97 5.0 -11.5 12.5
89377 -82.5 -174.5 55 ALL MSLP 147 6 4 2.9 8.3 8.7
89504 -72.0 2.5 1290 ALL MSLP 723 2 0 3.4 -3.8 5.1
89512 -70.8 11.8 102 ALL MSLP 711 11 2 2.8 -7.0 7.5
89514 -70.8 11.7 117 ALL MSLP 408 5 1 2.5 -6.2 6.7
89592 -66.6 93.0 35 ALL MSLP 700 1 0 2.8 -4.9 5.6
89611 -66.3 110.5 41 ALL MSLP 721 2 0 2.6 -4.2 4.9
89642 -66.7 140.0 43 ALL MSLP 703 12 2 3.5 -6.8 7.7
89768 -78.6 166.7 920 ALL MSLP 162 1 1 3.2 -3.6 4.8
89832 -66.7 139.8 243 ALL MSLP 594 102 17 2.9 -10.0 10.4
89866 -77.4 163.7 120 ALL MSLP 154 0 0 3.3 -4.9 5.9
89879 -71.9 171.2 30 ALL MSLP 139 4 3 2.4 -10.0 10.3
