ncmrwf weekly data monitoring report 21/05/2007 to … · ncmrwf weekly data monitoring report...

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



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




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




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


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




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




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




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


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



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



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


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



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



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



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 -->

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