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NCMRWF Weekly Data Monitoring Report
21/05/2007 to 27/05/2007
Data Processing and Monitoring Group
Permission to quote from this reportShould be obtained from Head, NCMRWF
NATIONAL CENTRE FOR MEDIUM RANGE WEATHER FORECASTING
(MINISTRY OF EARTH SCIENCES) A-50, Institutional Area,
Phase-II, Sector-62,
NOIDA (U.P.) – 201307 INDIA
2
CONTENTS
Page
1. Introduction . . . . . . . . . . . . . 3
2. NCMRWF Monitoring Statistics . . . . . . . . . 4
3. Table-1: Results of Complex Quality Control of Radiosonde . . 5
4. Table-2: Total Upper Air Data Reports . . . . . . . 6-7
5. Table-3a: 100 hPa Geo-potential Height Increments (00z) . . . 8
6. Table-3b: 100 hPa Geo-potential Height Increments (12z) . . . 9
7. Table-4a: 500 hPa Geo-potential Height Increments (00z) . . . 10
8. Table-4b: 500 hPa Geo-potential Height Increments (12z) . . . 11
9. Table-5a: 100 hPa Dry Temperature Increments (00z) . . . . 12
10. Table-5b: 100 hPa Dry Temperature Increments (12z) . . . . 13
11. Table-6a: 500 hPa Dry Temperature Increments (00z) . . . . 14
12. Table-6b: 500 hPa Dry Temperature Increments (12z) . . . . 15
13. Table-7a: 100 hPa Zonal Wind Increments (00z) . . . . . 16
14. Table-7b: 100 hPa Zonal Wind Increments (12z) . . . . . 17
15. Table-8a: 500 hPa Zonal Wind Increments (00z) . . . . . 18
16. Table-8b: 500 hPa Zonal Wind Increments (12z) . . . . . 19
17. Table-9a: 100 hPa Meridional Wind Increments (00z) . . . . .20
18. Table-9b: 100 hPa Meridional Wind Increments (12z) . . . . .21
19. Table-10a: 500 hPa Meridional Wind Increments (00z) . . . .22
20. Table-10b: 500 hPa Meridional Wind Increments (12z) . . . .23
21. Explanatory note on tables and figures . . . . . . . 24-25
22. Global Charts for Five Types of Observations . . . . . . Fig. 1.1 –
1.7
23. Histograms for all Seven Types of Observations . . . . . Fig. 2.1 – 2.7
3
1. INTRODUCTION
As a weekly publication, the NCMRWF Data Monitoring Report presents a
general view of the data availability for the whole month as well as its quality. Data produced
by the Global Observing System, transmitted by the Global Telecommunication System and
received by the India meteorological Department at New Delhi is relayed to the NCMRWF
data processing system. This report consists of the results of quantity monitoring of all the
data received at the NCMRWF including delayed data upto a period of three days. It may
however be mentioned that data which goes into the analysis-forecast system is likely to be
less because of the cut-off time. Besides quantity monitoring, the report also presents results
of quality monitoring for the Indian subcontinent (blocks 42 and 43) data only. For quality
monitoring only those data, which are received at the NCMRWF within the cut-off time are
used.
The zone of responsibility of the RTH New Delhi as far as the collection
(through the main telecommunication network) and processing of observational data is
concerned includes India, Pakistan, Bangladesh, Nepal, Bhutan, Sri Lanka, Maldives, Burma
and adjoining sea and ocean areas. Objective monitoring of the quality of the data ( for block
42 and 43 only) is undertaken by the NCMRWF as a weekly activity. Tables are prepared
following the Commission for Basic System (CBS) recommended format so that the
monitoring results can be immediately compared with those from other meteorological
centers. This is an important task, because frequent comparisons of this kind are absolutely
necessary for improvement of the quality of tropical data.
Following the establishment procedure at other major weather forecasting
centers the model first guess has been used in determining data quality. This approach
assumes a very accurate first guess, which is not necessarily valid in data sparse regions like
the tropics and also due to model systematic errors. As a result the quality monitoring of
tropical data is a difficult task, and any judgment has to be arrived at carefully.
This report is an outcome of the combined effort of the Data Processing
and Monitoring Group of the NCMRWF. Cooperation of the other groups at the NCMRWF
as well as that of the Computer Maintenance Corporation is acknowledged. Comments and
suggestions are welcome and should be sent to :
Head, NCMRWF
Attn: Data Processing and Monitoring Group
NCMRWF,
A-50, Institutional Area,
Phase-II, Sector-62
NOIDA (U.P.) – 201307 INDIA
4
2. NCMRWF MONITORING STATISTICS
Availability (global) and data quality (for WMO blocks 42 and 43 only) are
presented in figures and tables of which only very brief descriptions are
given below. Complete explanations are given at the end of this report.
Data Availability (Global observations, weekly average)
Figs. 1.1 – 1.7 are global charts for all seven types of observations, received
at the NCMRWF. Each number is the average for 24 hours, over all
observations of the particular type received in a 5-degree87 box.
Fig Observation Type Parameter Level/Layer
1.1 SYNOP / SHIP MSL Pressure Surface
1.2 TEMP Geo-potential 500 hPa
1.3 TEMP / PILOT Wind 300 hPa
1.4 AIREP Wind 300 – 150 hPa
1.6 (a) SATOB Wind 400 – 150 hPa
1.6 (b) SATOB Wind 1000 – 700 hPa
1.7 DRIBU MSL Pressure Surface
Data Availability (Number of daily reports)
Figs. 2.1 – 2.7 are histograms for all seven types of reports received at the
NCMRWF. Each figure represents number of reports of the particular type
for each day of the month.
Fig Observation Type Parameter
2.1 SYNOP / SHIP MSL Pressure
2.2 TEMP Geo-potential / Wind
2.3 PILOT Wind
2.4 AIREP Wind
2.6 SATOB Wind
2.7 DRIBU MSL Pressure
5
TABLE 1 RESULTS OF COMPLEX QUALITY CONTROL OF RADIOSONDE
MANDATORY LEVEL HEIGHTS AND TEMPERATURES FOR 21 5 2007 TO 27 5 2007
Total Number of Reports for Land Stations by WMO Block (00Z and 12Z)
0 1 2 3 4 5 6 7 8 9 0 0 90 67 76 81 0 51 96 102 0 10 146 63 63 18 18 27 125 90 0 0 20 33 28 88 98 133 55 70 125 83 126 30 122 128 70 50 103 51 11 28 19 0 40 189 60 228 196 26 14 0 357 124 0 50 56 98 126 98 168 28 140 182 182 112 60 67 99 70 20 25 53 0 0 94 0 70 194 391 879 0 60 0 45 0 94 0 80 12 14 106 183 0 42 0 29 7 87 90 0 220 0 56 276 7 122 83 7 0
Error Counts by WMO Block (all hydrostatic error types)
0 1 2 3 4 5 6 7 8 9 0 0 1 1 2 4 0 3 3 2 0 10 5 5 16 0 1 1 7 4 0 0 20 5 0 3 0 51 0 0 1 6 3 30 11 11 2 4 7 0 0 0 0 0 40 5 11 113 36 0 6 0 43 108 0 50 0 0 0 1 6 1 2 25 60 23 60 5 29 11 6 14 42 0 0 23 0 70 3 33 157 0 3 0 4 0 77 0 80 4 1 37 29 0 3 0 1 0 0 90 0 43 0 2 18 0 105 42 11 0
Percent of Confident Corrections by WMO Block
0 1 2 3 4 5 6 7 8 9 0 0 100 0 0 100 0 0 0 100 0 10 0 100 0 0 0 100 0 0 0 0 20 0 0 0 0 66 0 0 0 75 0 30 19 99 100 0 100 0 0 0 0 0 40 33 0 60 66 0 0 0 53 42 0 50 0 0 0 0 50 0 0 33 100 100 60 100 50 50 0 0 41 0 0 0 0 70 0 50 36 0 50 0 0 0 0 0 80 0 100 100 14 0 100 0 0 0 0 90 0 50 0 0 50 0 39 64 50 0
6
TABLE 2: TOTAL UPPER AIR REPORTS RECEIVED 21 5 2007 TO 27 5 2007 FOR WMO BLOCK 42 AND 43 STATIONS ONLY
WMO STATION AT 00Z AT 06Z AT 12Z AT 18Z IDENT NAME T P T P T P T P
42027 SRINAGAR 7 6 0 0 7 6 0 0 42033 SASOUMA 0 0 0 0 0 0 0 0 42055 JAMMU 0 0 0 0 0 0 0 0 42057 PATHANKOT 0 0 0 0 0 0 0 0 42065 MANALI 5 5 0 0 0 0 0 0 42071 AMRITSAR 0 7 0 0 0 4 0 0 42073 ADAMPUR 0 0 0 0 0 0 0 0 42098 HALWARA 0 0 0 0 0 0 0 0 42101 PATIALA 7 7 0 0 4 7 0 0 42103 AMBALA 0 3 0 0 0 5 0 0 42105 CHANDIGARH 0 0 0 0 0 0 0 0 42111 DEHRA DUN 0 6 0 0 0 7 0 0 42123 GANGANAGAR 0 0 0 0 0 0 0 0 42165 BIKANER 0 2 0 0 0 2 0 0 42170 CHURU 0 7 0 0 0 7 0 0 42182 NEW DELHI/SAF 6 7 0 0 7 7 0 0 42189 BAREILLY 0 4 0 0 0 4 0 0 42260 AGRA 0 1 0 0 0 0 0 0 42273 BAHRAICH 0 7 0 0 0 7 0 0 42299 GANGTOK 0 0 0 0 0 0 0 0 42314 DIBRUGR/MOHAN 6 5 0 0 6 6 0 0 42328 JAISALMER 0 6 0 0 0 7 0 0 42339 JODHPUR 4 6 0 0 6 5 0 0 42348 JAIPUR/SNGNER 6 7 0 0 0 7 0 0 42361 GWALIOR 5 5 0 0 0 0 0 0 42369 LUCKNOW/AMAUS 7 4 0 0 6 5 0 0 42379 GORAKHPUR 7 7 0 0 0 7 0 0 42397 SILIGURI 7 1 0 0 7 5 0 0 42398 BAGDOGRA 0 0 0 0 0 0 0 0 42410 GAUHATI 5 6 0 0 7 7 0 0 42416 TEZPUR/BINDUK 0 0 0 0 0 0 0 0 42423 JORHAT 0 0 0 0 0 0 0 0 42435 BARMER 0 7 0 0 0 7 0 0 42452 KOTA AERODROM 0 6 0 0 0 7 0 0 42475 ALLAHABAD/BAM 0 4 0 0 0 7 0 0 42492 PATNA 7 7 0 0 7 7 0 0 42498 BHAGALPUR 0 0 0 0 0 0 0 0 42539 DEESA 0 1 0 0 0 2 0 0 42542 UDAIPUR DABOK 0 6 0 0 0 7 0 0 42591 GAYA 0 6 0 0 0 7 0 0 42623 IMPHAL TULIHL 0 1 0 0 0 3 0 0 42634 BHUJ-RUDRAMTA 0 6 0 0 0 7 0 0 42647 AHMADABAD 5 7 0 0 0 7 0 0 42667 BHOPAL/BAIRGR 7 7 0 0 6 7 0 0 42675 JABALPUR 0 7 0 0 0 7 0 0 42701 RANCHI 7 7 0 0 7 7 0 0 42706 BANKURA 0 0 0 0 0 0 0 0 42724 AGARTALA 7 6 0 0 7 7 0 0 42734 JAMNAGAR 0 0 0 0 0 0 0 0
continued…
7
Continued from pre page…
WMO STATION AT 00Z AT 06Z AT 12Z AT 18Z IDENT NAME T P T P T P T P
42798 JAMSHEDPUR 0 7 0 0 0 4 0 0 42802 KALAIKUNDA 0 0 0 0 0 0 0 0 42809 CALCUTTA/DMDM 7 7 0 0 7 7 0 0 42867 NAGPUR SONEGN 7 7 0 0 4 7 0 0 42874 RAIPUR 7 6 0 0 0 7 0 0 42886 JHARSUGUDA 0 0 0 0 0 0 0 0 42895 BALASORE 0 3 0 0 0 5 0 0 42909 VERAVAL 0 6 0 0 0 6 0 0 42971 BHUBANESWAR 7 7 0 0 7 7 0 0 43003 BOMBAY/SANTCR 7 7 0 0 7 6 0 0 43014 AURNGABAD/AER 6 5 0 0 0 0 0 0 43041 JAGDALPUR 7 6 0 0 0 0 0 0 43049 GOPALPUR 0 5 0 0 0 7 0 0 43063 POONA 0 7 0 0 0 7 0 0 43110 RATNAGIRI 0 7 0 0 0 7 0 0 43128 HYDERABAD AER 4 7 0 0 4 7 0 0 43150 VISHAKHAPATNM 6 7 0 0 6 7 0 0 43185 MACHILIPATNAM 7 7 0 0 6 6 0 0 43192 GOA/PANJIM 7 6 0 0 0 0 0 0 43194 GOA/DABOLIM 0 0 0 0 0 0 0 0 43201 GADAG 0 7 0 0 0 6 0 0 43237 ANANTAPUR 0 6 0 0 0 5 0 0 43279 MADRAS/MINAMB 7 7 0 0 7 7 0 0 43284 MANG/BAJPE 0 0 0 0 0 0 0 0 43285 MANG/PANAMBUR 7 6 0 0 7 7 0 0 43295 BANGALORE 7 7 0 0 7 7 0 0 43311 AMINI DIVI 6 6 0 0 6 7 0 0 43333 PORT BLAIR 7 7 0 0 7 7 0 0 43344 TIRUCHIRAPLLI 0 7 0 0 0 7 0 0 43346 KARAIKAL 7 7 0 0 5 7 0 0 43353 COCHIN/WILING 7 5 0 0 7 5 0 0 43368 CAR NICOBAR 0 0 0 0 0 0 0 0 43369 MINICOY 7 7 0 0 6 7 0 0 43371 TRIVANDRUM 6 7 0 0 7 7 0 0 43373 TRIVANDRUM/TH 0 0 0 0 0 0 0 0
8
TABLE 3a: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA GEOPOTENTIAL HEIGHT INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS GEOPOTENTIAL METERS
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 2 50 92.9 -433.9 443.7 42101 4 50 272.7 351.2 444.6 42182 4 0 112.1 141.2 180.3 42314 4 0 143.4 -83.9 166.1 42339 3 33 394.1 -138.5 417.7 42369 3 33 212.1 -157.6 264.2 42379 3 0 89.8 -155.6 179.7 42410 3 33 67.9 59.7 90.4 42492 7 0 138.0 8.1 138.3 42667 1 0 0.0 -30.4 30.4 42701 7 0 95.8 169.0 194.3 42724 5 0 101.2 -1.2 101.2 42809 5 40 123.8 89.0 152.5 42867 4 0 53.9 -43.5 69.3 42874 3 33 142.2 91.1 168.9 42971 6 33 70.3 147.9 163.8 43003 5 20 96.7 -165.8 192.0 43041 3 0 66.2 17.0 68.4 43128 2 50 304.4 -1.9 304.4 43150 4 50 95.8 87.7 129.9 43185 6 17 163.4 2.0 163.4 43192 4 0 529.4 -331.9 624.8 43279 5 0 88.0 64.2 109.0 43285 4 25 160.4 -30.0 163.1 43295 4 0 40.2 44.3 59.8 43333 6 0 107.0 -133.5 171.1 43346 3 0 58.4 231.0 238.2 43353 2 0 117.3 -80.5 142.3 43369 5 0 212.9 -334.6 396.6 43371 6 17 192.5 -147.7 242.6
9
TABLE 3b: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA GEOPOTENTIAL HEIGHT INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS GEOPOTENTIAL METERS
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 2 0 8.6 -213.7 213.8 42101 2 0 77.9 251.3 263.1 42182 7 14 75.4 122.2 143.6 42314 2 0 55.8 -410.6 414.4 42339 5 20 121.5 132.3 179.6 42369 3 33 102.7 -36.5 109.0 42397 1 0 0.0 74.3 74.3 42410 5 60 223.5 -286.9 363.7 42492 4 50 86.2 -125.1 151.9 42667 3 33 105.9 93.8 141.5 42701 4 75 64.9 72.4 97.3 42724 4 25 107.4 -118.7 160.1 42809 5 0 173.9 -136.5 221.1 42867 3 0 68.1 59.4 90.4 42971 5 60 60.1 -40.5 72.4 43003 4 0 43.2 47.4 64.1 43128 2 0 79.7 230.9 244.3 43150 3 33 2.1 64.2 64.2 43185 5 0 83.5 61.2 103.5 43279 6 17 134.4 21.7 136.2 43285 4 0 51.8 181.9 189.1 43295 4 25 91.9 -22.4 94.6 43311 1 0 0.0 -219.9 219.9 43333 6 0 49.2 -125.9 135.2 43346 1 0 0.0 87.2 87.2 43353 3 0 113.8 -131.5 173.9 43369 5 20 37.9 -38.2 53.9 43371 5 0 84.0 -29.0 88.9
10
TABLE 4a: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA GEOPOTENTIAL HEIGHT INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS GEOPOTENTIAL METERS
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 7 14 22.8 -96.6 99.3 42065 5 60 63.7 -128.9 143.8 42101 7 29 75.4 30.2 81.2 42182 6 67 14.5 10.1 17.7 42314 6 0 48.9 21.2 53.3 42339 4 50 41.6 12.5 43.4 42348 4 50 160.8 131.6 207.7 42361 5 0 21.4 55.6 59.6 42369 6 67 73.6 -39.3 83.5 42379 5 0 26.5 -19.3 32.8 42397 7 86 27.7 -125.7 128.8 42410 5 80 16.8 -58.7 61.0 42492 7 43 22.1 -9.1 23.9 42647 2 100 35.2 62.7 71.8 42667 4 0 20.9 37.0 42.5 42701 7 43 16.5 26.0 30.8 42724 7 29 18.2 14.1 23.0 42809 7 86 28.1 39.2 48.3 42867 6 0 24.0 -1.8 24.1 42874 7 57 21.1 39.1 44.5 42971 7 43 34.6 50.7 61.4 43003 7 71 44.3 -27.9 52.4 43014 6 33 30.4 28.6 41.7 43041 7 14 20.9 21.5 30.0 43128 3 33 35.8 5.8 36.3 43150 6 100 12.8 -11.6 17.2 43185 7 57 40.9 45.4 61.1 43192 7 71 21.5 -15.7 26.6 43279 7 71 29.6 44.3 53.2 43285 7 100 25.8 29.4 39.1 43295 7 71 10.4 26.9 28.8 43311 4 100 15.7 -10.6 18.9 43333 7 0 19.3 4.6 19.8 43346 7 100 5.9 34.9 35.4 43353 7 71 23.6 12.3 26.6 43369 7 100 30.7 16.3 34.7 43371 6 50 24.5 34.8 42.6
11
TABLE 4b: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA GEOPOTENTIAL HEIGHT INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS GEOPOTENTIAL METERS
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 7 14 24.8 -67.3 71.7 42101 4 75 21.0 13.6 25.0 42182 7 100 173.9 -61.0 184.3 42314 4 0 29.6 -9.7 31.2 42339 5 100 26.7 15.9 31.0 42369 5 40 1884.5 928.4 2100.8 42397 7 14 49.7 -115.7 126.0 42410 7 43 101.8 -87.4 134.1 42492 7 71 25.2 -16.8 30.3 42667 5 0 28.8 -3.7 29.1 42701 7 57 36.9 23.8 44.0 42724 7 71 370.1 151.3 399.9 42809 7 57 56.1 -19.9 59.6 42867 4 50 34.4 2.8 34.5 42971 6 67 29.6 6.2 30.2 43003 6 67 10.0 -14.5 17.6 43128 3 0 42.6 68.8 80.9 43150 5 80 30.6 2.9 30.7 43185 6 83 19.2 39.4 43.8 43279 7 100 34.1 23.4 41.4 43285 7 57 22.5 38.1 44.2 43295 7 86 11.6 7.2 13.7 43311 6 83 40.0 -17.7 43.8 43333 7 0 24.3 -2.5 24.5 43346 5 80 13.4 20.8 24.7 43353 6 33 34.9 0.6 34.9 43369 6 83 24.5 23.0 33.6 43371 7 71 22.4 3.5 22.7
12
TABLE 5a: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA DRY TEMPERATURE INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS DEGREES KELVIN
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 2 0 1.8 -4.7 5.0 42101 4 0 2.6 4.9 5.5 42182 4 0 1.7 1.0 2.0 42314 4 0 1.9 -1.7 2.5 42339 3 0 2.7 0.8 2.9 42369 3 0 7.3 4.6 8.6 42379 3 0 1.6 -1.6 2.2 42410 3 0 4.4 0.4 4.4 42492 7 0 2.6 0.8 2.7 42667 1 0 0.0 -1.3 1.3 42701 7 0 2.9 1.5 3.3 42724 5 20 3.6 0.5 3.6 42809 5 20 1.4 -1.5 2.1 42867 4 0 2.1 -2.0 2.9 42874 3 0 7.1 7.2 10.1 42971 6 17 5.1 -2.9 5.8 43003 5 0 9.8 1.6 10.0 43041 3 0 5.0 1.6 5.3 43128 2 0 5.1 5.6 7.6 43150 4 0 4.4 -2.0 4.8 43185 6 0 6.2 0.5 6.3 43192 4 0 8.4 0.6 8.4 43279 5 0 1.4 -0.2 1.4 43285 4 0 1.9 -4.9 5.2 43295 4 0 2.5 -0.9 2.7 43333 6 17 3.1 -1.6 3.5 43346 3 0 7.3 3.5 8.1 43353 2 0 1.7 -6.1 6.3 43369 5 20 6.4 -2.0 6.7 43371 6 0 5.6 -2.6 6.2
13
TABLE 5b: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA DRY TEMPERATURE INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS DEGREES KELVIN
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 2 0 0.8 -4.8 4.9 42101 2 0 0.3 -0.4 0.5 42182 7 0 2.4 1.4 2.8 42314 2 0 0.3 -7.0 7.0 42339 5 0 2.1 2.1 3.0 42369 3 0 4.2 -4.2 5.9 42397 1 0 0.0 5.6 5.6 42410 5 0 10.2 3.8 10.9 42492 4 0 5.3 -2.7 5.9 42667 3 0 1.6 0.5 1.6 42701 4 0 3.1 -2.4 3.9 42724 4 0 1.2 -6.2 6.3 42809 5 20 4386.1 2188.7 4901.8 42867 3 0 2.1 -2.3 3.1 42971 5 0 4.6 -3.9 6.0 43003 4 0 6.2 1.5 6.4 43128 2 0 2.0 -3.2 3.8 43150 3 0 5.5 -6.3 8.4 43185 5 20 3.1 -3.6 4.8 43279 6 0 3.9 -3.0 5.0 43285 4 0 3.1 2.7 4.1 43295 4 50 3.6 -5.7 6.7 43311 1 0 0.0 0.0 0.0 43333 6 0 2.2 -2.3 3.2 43346 1 0 0.0 -2.9 2.9 43353 3 33 7.6 -5.0 9.1 43369 5 0 5.4 2.2 5.9 43371 5 0 6.1 -1.8 6.4
14
TABLE 6a: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA DRY TEMPERATURE INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS DEGREES KELVIN
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 7 0 2.7 -3.2 4.2 42065 5 0 5.1 -3.1 6.0 42101 7 14 3.6 2.5 4.4 42182 6 0 1.4 0.0 1.4 42314 6 0 2.5 -2.2 3.4 42339 4 0 2.7 3.1 4.1 42348 4 0 15.7 11.0 19.2 42361 5 20 2.9 1.6 3.3 42369 6 0 4.4 -0.8 4.5 42379 5 0 2.1 1.4 2.5 42397 7 0 2.5 1.7 3.1 42410 5 0 0.2 1.5 1.5 42492 7 0 1.9 1.4 2.4 42647 2 0 3.9 -0.2 4.0 42667 4 0 0.8 1.2 1.5 42701 7 14 2.2 1.2 2.5 42724 7 0 1.7 0.7 1.8 42809 7 0 2.7 0.5 2.8 42867 6 0 1.3 -1.3 1.8 42874 7 0 1.2 1.4 1.9 42971 7 0 2.8 0.6 2.8 43003 7 14 2.7 -0.3 2.7 43014 6 0 3.0 -1.0 3.2 43041 7 0 2.4 0.4 2.5 43128 3 0 3.8 -0.1 3.8 43150 6 0 1.2 0.9 1.5 43185 7 0 1.6 0.1 1.6 43192 7 0 1.6 -2.1 2.7 43279 7 0 1.2 0.3 1.2 43285 7 0 1.8 -0.7 1.9 43295 7 0 1.2 -0.5 1.3 43311 4 0 1.1 -1.3 1.7 43333 7 0 1.6 -2.4 2.9 43346 7 0 0.6 1.1 1.2 43353 7 0 1.7 -0.8 1.8 43369 7 0 1.8 -1.3 2.2 43371 6 0 1.9 -0.1 2.0
15
TABLE 6b: NCMRWF RADIOSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA DRY TEMPERATURE INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS DEGREES KELVIN
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 7 0 1.3 -0.4 1.4 42101 4 0 2.7 3.0 4.0 42182 7 0 2.1 1.6 2.6 42314 4 0 2.1 -3.7 4.3 42339 5 20 1.3 1.6 2.0 42369 5 0 1.5 0.6 1.6 42397 7 0 3.3 1.1 3.4 42410 7 0 3.9 -1.0 4.1 42492 7 14 1.2 0.1 1.2 42667 5 20 1.6 -2.7 3.1 42701 7 0 4.4 -1.9 4.8 42724 7 0 1.3 -0.6 1.4 42809 7 14 4.0 -1.3 4.3 42867 4 0 0.6 -0.4 0.7 42971 6 0 1.6 -1.8 2.4 43003 6 0 1.9 -0.9 2.2 43128 3 0 5.8 0.1 5.8 43150 5 0 0.9 1.1 1.4 43185 6 0 1.5 0.4 1.6 43279 7 0 2.3 -0.3 2.3 43285 7 0 1.6 0.9 1.8 43295 7 14 1.0 0.3 1.1 43311 6 0 1.9 -1.0 2.1 43333 7 0 0.4 -1.3 1.3 43346 5 20 0.8 1.1 1.3 43353 6 0 1.9 -0.6 2.0 43369 6 0 2.0 -0.2 2.0 43371 7 0 0.9 -0.4 1.0
16
TABLE 7a: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA ZONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42101 4 25 5.5 0.8 5.6 42182 4 0 14.9 -13.5 20.1 42339 3 0 1.5 -11.0 11.1 42369 3 0 6.8 -10.0 12.1 42410 3 33 1.7 -4.5 4.8 42667 1 0 0.0 -10.0 10.0 42701 4 0 11.2 -6.1 12.7 42724 4 0 1.9 -6.1 6.4 42809 5 0 4.2 -4.8 6.4 42867 3 0 4.5 -7.5 8.8 42971 5 0 6.0 -5.0 7.8 43003 5 0 3.3 -4.3 5.4 43041 3 0 3.0 -5.4 6.1 43128 2 0 3.1 -7.0 7.6 43150 4 0 3.6 -12.9 13.4 43185 5 0 6.5 -5.9 8.8 43192 4 0 6.8 -7.6 10.2 43279 2 0 9.0 -2.0 9.3 43285 4 0 2.6 -1.5 3.0 43295 4 0 2.5 -0.2 2.5 43333 6 0 4.4 -4.0 6.0 43346 1 0 0.0 -6.9 6.9 43369 5 0 8.8 -8.5 12.2 43371 4 0 20.1 -12.1 23.5
17
TABLE 7b: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA ZONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42101 2 0 3.2 -9.0 9.6 42182 7 0 67.0 16.3 69.0 42339 5 0 4.2 -11.3 12.0 42369 3 0 2.9 -8.2 8.7 42410 5 0 4.7 -3.7 6.0 42667 1 0 0.0 -8.5 8.5 42701 3 0 3.4 -4.6 5.7 42724 3 33 5.7 -1.1 5.8 42809 5 0 6.3 -1.6 6.5 42867 3 0 4.7 -6.3 7.9 42971 5 0 5.8 -1.6 6.0 43003 4 0 2.1 -5.8 6.2 43128 2 0 4.4 -1.9 4.8 43150 3 0 2.1 -6.4 6.8 43185 5 0 2.2 -1.0 2.4 43285 2 0 5.2 -4.4 6.8 43295 4 0 8.8 -5.1 10.2 43333 6 0 6.0 -3.7 7.0 43346 1 0 0.0 -6.5 6.5 43369 5 0 6.5 -5.0 8.2 43371 5 0 6.4 -12.8 14.3
18
TABLE 8a: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA ZONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 5 0 4.1 -4.7 6.3 42065 4 0 1.7 -7.4 7.6 42101 7 0 2.4 -1.6 2.9 42182 6 0 3.4 -1.7 3.8 42339 4 0 27.4 15.1 31.3 42348 1 0 0.0 2.0 2.0 42361 5 0 2.8 -0.3 2.8 42369 6 0 10.8 8.9 14.0 42379 3 0 8.5 12.7 15.3 42410 5 0 2.7 -2.8 3.9 42492 3 0 3.4 -0.7 3.5 42647 2 0 2.6 -4.8 5.5 42667 2 0 2.5 4.2 4.8 42701 7 0 2.3 1.5 2.7 42724 5 0 4.5 -0.1 4.5 42809 7 14 3.1 1.1 3.3 42867 6 0 2.7 -0.2 2.7 42874 5 0 4.9 -0.8 4.9 42971 7 0 3.1 1.5 3.4 43003 7 0 2.3 -0.4 2.3 43014 4 0 2.0 -0.6 2.1 43041 7 0 4.8 0.3 4.8 43128 3 0 2.1 -2.7 3.4 43150 6 0 6.1 3.5 7.0 43185 7 0 2.5 1.2 2.8 43192 6 0 1.9 1.8 2.6 43279 4 0 0.8 1.4 1.6 43285 6 0 2.4 1.8 3.0 43295 7 14 3.3 3.6 4.9 43311 4 0 1.4 0.4 1.5 43333 7 0 2.0 0.1 2.0 43346 6 0 2.6 0.5 2.7 43353 1 0 0.0 2.1 2.1 43369 7 0 3.0 2.0 3.6 43371 6 0 2.4 0.3 2.4
19
TABLE 8b: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA ZONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 6 0 4.8 -2.1 5.2 42101 4 0 2.2 -4.2 4.7 42182 7 0 6.7 -2.0 7.0 42314 2 0 3.9 3.0 4.9 42339 5 0 2.6 0.4 2.6 42369 5 0 14.9 7.6 16.7 42397 1 0 0.0 -2.1 2.1 42410 7 0 4.4 -1.8 4.8 42492 4 0 8.3 2.5 8.7 42667 3 0 0.8 1.9 2.0 42701 7 0 2.8 1.6 3.2 42724 6 0 3.5 1.3 3.7 42809 7 0 3.5 0.4 3.5 42867 4 0 3.2 -0.2 3.2 42971 6 0 2.4 -1.2 2.7 43003 6 0 3.3 0.7 3.4 43128 3 0 3.5 -1.2 3.7 43150 5 0 1.1 0.8 1.4 43185 6 0 3.6 -0.7 3.6 43279 4 0 4.1 -0.9 4.2 43285 7 0 3.0 0.8 3.1 43295 5 0 3.1 0.9 3.3 43311 6 0 1.1 1.0 1.5 43333 7 0 1.6 -1.2 2.0 43346 4 0 3.0 -0.2 3.0 43353 2 0 4.6 2.1 5.1 43369 5 0 4.1 -1.3 4.3 43371 7 0 2.1 -0.4 2.2
20
TABLE 9a: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA MERIDIONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42101 4 0 4.3 5.7 7.1 42182 4 0 10.1 -1.5 10.2 42339 3 0 0.9 1.6 1.9 42369 3 0 0.1 1.6 1.6 42410 3 0 0.3 -6.9 6.9 42667 1 0 0.0 4.9 4.9 42701 4 0 0.3 -2.5 2.5 42724 4 0 5.0 1.6 5.2 42809 5 0 5.5 -6.6 8.6 42867 3 0 3.5 -3.8 5.2 42971 5 0 4.5 -3.7 5.8 43003 5 0 5.3 -2.3 5.8 43041 3 0 2.6 -4.0 4.8 43128 2 0 0.5 -4.4 4.4 43150 4 0 2.6 -5.1 5.7 43185 5 0 2.2 -2.3 3.2 43192 4 0 4.2 -2.8 5.0 43279 2 0 0.3 -7.1 7.1 43285 4 0 6.4 -2.6 6.9 43295 4 0 4.6 -4.1 6.1 43333 6 0 9.3 -4.6 10.3 43346 1 0 0.0 -6.8 6.8 43369 5 0 7.8 -10.1 12.8 43371 4 0 5.3 -6.0 8.0
21
TABLE 9b: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
100 HPA MERIDIONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42101 2 0 3.1 4.3 5.2 42182 7 14 54.5 23.2 59.2 42339 5 0 4.2 2.0 4.6 42369 3 0 5.4 -1.7 5.7 42410 5 0 3.8 -0.3 3.8 42667 1 0 0.0 2.3 2.3 42701 3 0 6.7 2.3 7.1 42724 3 0 3.5 -0.3 3.5 42809 5 0 4.4 -5.3 6.9 42867 3 0 1.6 -3.3 3.6 42971 5 0 4.2 -3.0 5.2 43003 4 0 2.9 -5.2 5.9 43128 2 0 1.8 -1.6 2.4 43150 3 0 4.6 -5.0 6.8 43185 5 0 2.5 -1.0 2.7 43285 2 0 1.2 -5.7 5.8 43295 4 0 2.9 -6.0 6.7 43333 6 0 4.2 -0.3 4.2 43346 1 0 0.0 -11.0 11.0 43369 5 0 3.9 -13.7 14.3 43371 5 0 2.8 -4.3 5.1
22
TABLE 10a: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA MERIDIONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(00Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 5 0 2.5 1.0 2.7 42065 4 0 5.6 2.0 5.9 42101 7 0 1.9 0.6 2.0 42182 6 0 3.3 3.7 4.9 42339 4 0 10.6 4.5 11.5 42348 1 0 0.0 -0.3 0.3 42361 5 0 2.6 1.9 3.2 42369 6 0 3.4 -4.3 5.5 42379 3 0 4.0 -11.7 12.4 42410 5 0 2.6 4.4 5.1 42492 3 0 1.9 -1.4 2.4 42647 2 0 8.7 10.3 13.5 42667 2 0 2.3 1.0 2.5 42701 7 0 3.5 -2.2 4.1 42724 5 0 3.8 0.2 3.8 42809 7 0 2.6 0.0 2.6 42867 6 0 2.5 -0.4 2.6 42874 5 0 4.4 -2.6 5.1 42971 7 0 3.3 0.1 3.3 43003 7 0 2.5 1.1 2.7 43014 4 0 3.3 -0.5 3.4 43041 7 0 2.4 -0.4 2.4 43128 3 0 4.1 0.6 4.2 43150 6 0 2.6 0.3 2.6 43185 7 0 2.2 -0.2 2.2 43192 6 0 1.5 2.0 2.5 43279 4 0 0.9 -0.9 1.3 43285 6 0 2.1 0.3 2.1 43295 7 0 2.3 -1.0 2.5 43311 4 0 2.0 -0.7 2.1 43333 7 0 2.5 0.8 2.6 43346 6 0 0.9 -1.2 1.4 43353 1 0 0.0 -1.9 1.9 43369 7 0 2.2 -2.5 3.3 43371 6 0 2.3 -0.7 2.4
23
TABLE 10b: NCMRWF RAWINSONDE MONITORING STATISTICS FOR WMO BLOCK 42 AND 43 STATIONS ONLY
500 HPA MERIDIONAL WIND INCREMENTS - 21 5 2007 TO 27 5 2007(12Z)
UNIT IS METERS/SEC
WMO OBS % SD BIAS RMS IDENT RECD REJ 42027 6 0 3.3 3.0 4.5 42101 4 0 4.3 -3.0 5.3 42182 7 0 4.0 2.3 4.6 42314 2 0 3.3 2.2 4.0 42339 5 0 4.2 -1.3 4.4 42369 5 0 6.1 -6.5 9.0 42397 1 0 0.0 1.7 1.7 42410 7 0 6.2 -0.6 6.3 42492 4 0 4.8 -2.6 5.5 42667 3 0 1.4 -1.6 2.2 42701 7 0 3.4 -1.4 3.7 42724 6 0 3.3 2.4 4.1 42809 7 0 1.2 0.6 1.3 42867 4 0 3.2 -1.6 3.6 42971 6 0 4.7 1.0 4.8 43003 6 0 1.0 -1.0 1.4 43128 3 0 2.3 -1.2 2.5 43150 5 0 2.3 0.5 2.3 43185 6 0 1.6 -0.3 1.6 43279 4 0 1.5 -0.4 1.5 43285 7 0 2.7 1.3 3.0 43295 5 0 5.1 0.6 5.2 43311 6 0 3.0 2.1 3.7 43333 7 0 2.2 2.2 3.1 43346 4 0 1.1 -0.1 1.1 43353 2 0 5.7 4.8 7.5 43369 5 0 2.0 0.4 2.0 43371 7 0 1.8 1.6 2.4
24
14. Explanatory Note On Tables And Figures
General
The material presented in this report is based on the data that is received by
the India Meteorological department and relayed to the NCMRWF in a delayed mode.
Half hourly data are received 48 times a day, with an average delay of almost 20 minutes
from the real time, from 01 April 1997. Analysis is performed for all the four synoptic
hours, and therefore the assimilation cycle is run continuously to produce the first-guess
(six-hour forecast) for the analysis step. The five-day forecast however, is started only
from the 00Z initial conditions.
Data Availability
The average number of reports of each type received per day in a 5-degree
square box and rounded off to the nearest integer is indicated for the whole globe (Fig.
1.1 – 1.7). Four such numbers are actually displayed inside a 10-degree box for
convenience. The integer 0 means that the average number of observations in the smaller
box was less than 0.5. If no observation was received at all in the smaller box, then no
number is printed for that smaller box.
Histograms for the number of daily reports of a particular type received at the
NCMRWF are shown (Fig. 2.1 – 2.7). This is important in monitoring the steadiness of
the reception rate. It can be seen that on some days the number of reports received fall
off drastically. In most of the cases they are traced to computer problems at the data
reception centre.
Monitoring of quality and quantity of Global Radiosonde Reports (land) by
Complex Quality Control (CQC).
Table 1 presents the total number of land radiosonde reports received for the
month (by WMO Blocks), the number of hydrostatic errors detected in these reports by
the CQC and the percent of corrections performed that are confident corrections.
Indian data frequency
Table 2 shows the number of times an upper air station within WMO block 42
or 43 reported in this month. The lists of stations are in accordance with the latest WMO
directory. The numbers for 00Z, 06Z, 12Z and 18Z are listed in separate columns. All
stations that are expected to report are listed including those stations, which did not
report even once during the whole month. It is seen that there are variations in reporting
frequencies.
Indian data Quality
Tables 3-6 represent the results of quality monitoring statistics carried out at
the NCMRWF for the upper air stations under the WMO blocks 42 and 43 only. The
conventional procedure is followed, which is that of first computing the normalized
magnitude of the observation minus, first guess interpolated to the observation point (
the ‘residual’) and then comparing this value against a preset limit as well checking the
consistency of this value against similar values in the neighborhood. The rationale of this
approach is based on the work of A. Hollingsworth et. al., Weekly Weather Review,
Vol.114, No.5, May 1986 where the authors demonstrated the ability of modern data
25
assimilation system to monitor the quality of an observational network. However, in the
tropics these results have to be accepted with caution for two reasons:
(1) As mentioned before, the above procedure assumes high quality first guess,
which is not guaranteed in a data sparse area like the tropics.
(2) Since small scale features like convection play a dominant role in the tropical
atmosphere, sometimes there might be a mismatch between this scale and that of
the first guess which is determined by the forecast model.
Tables 3a and 3b present the number of observations received, rejection by the
analysis (in percentage), total bias, standard deviation and root mean square for the 100
hPa geo-potential heights, for 00Z and 12Z respectively in units of meters. Tables 4a and
4b are similar tables for 500 hPa geo-potential heights. Tables 5a and 5b present similar
results for 100 hPa dry temperatures and tables 6a and 6b present similar results for 500
hPa dry temperatures. Tables 7a and 7b show similar results for 100 hPa zonal winds,
and tables 8a and 8b similar results for 500 hPa zonal winds. Tables 9a and 9b show
similar results for 100 hPa meridional winds and tables 10a and 10b present similar
results for 500 hPa meridional winds.
SYN
OP
- Num
ber o
f Rep
orts
For
21/
05 to
27/
05, 2
007
36800
37000
37200
37400
37600
37800
38000
38200
38400
38600
12
34
56
7
Fig.
2.1
-- Reports -->
TEM
P - N
umbe
r of R
epor
ts F
or 2
1/05
to 2
7/05
, 200
7
1225
1230
1235
1240
1245
1250
1255
1260
12
34
56
7
Fig.
2.2
-- Reports -->
PILO
T - N
umbe
r of R
epor
ts F
or 2
1/05
to 2
7/05
, 200
7
800
820
840
860
880
900
920
940
12
34
56
7
Fig.
2.3
-- Reports -->
AIR
EP -
Num
ber o
f Rep
orts
For
21/
05 to
27/
05, 2
007
0
5000
10000
15000
20000
25000
12
34
56
7
Fig.
2.4
-- Reports -->
SATO
B -
Num
ber o
f Rep
orts
For
21/
05 to
27/
05, 2
007
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
12
34
56
7
Fig.
2.6
-- Reports -->
DR
IBU
- N
umbe
r of R
epor
ts F
or 2
1/05
to 2
7/05
, 200
7
54000
56000
58000
60000
62000
64000
66000
12
34
56
7
Fig.
2.7
-- Reports -->