Action Sheet of the Implementation Co-Ordination Meeting on the MTN (ICM MTN) (Geneva

WORLD METEOROLOGICAL ORGANIZATION ICT-ISS 2002/Doc. 2(1) ______(4.IX.2002) ______

COMMISSION FOR BASIC SYSTEMS ITEM 2 OPAG ON INFORMATION SYSTEMS & SERVICES

IMPLEMENTATION-COORDINATION TEAM ON ENGLISH only INFORMATION SYSTEMS & SERVICES

GENEVA, 9-13 SEPTEMBER 2002

WWW monitoring results

(Submitted by the Secretariat)

Summary and Purpose of Document

This document includes information on WWW monitoring results.

ACTION PROPOSED

The meeting is invited to review the information on WWW monitoring results given in the attached document CBS-XII/Doc. 5, which will be submitted to the Extraordinary session of CBS (Cairns, 4 to 12 December 2002). More detailed information on the analysis of the WWW monitoring results ise available:

 For the Annual Global Monitoring (AGM) on the WMO Web server through the page http://www.wmo.ch/web/www/ois/monitor/agm/agm.htm

 For the Special MTN Monitoring on the WMO FTP server under the sub-directory GTS_monitoring/SMM/From_WMO. The Secretariat is preparing the presentation of the analysis of the SMM results on the Web server. WORLD METEOROLOGICAL ORGANIZATION CBS-Ext.(02)/Doc. 5 ______(29.VIII.2002) ____ COMMISSION FOR BASIC SYSTEMS ITEM 5 EXTRAORDINARY SESSION Original: ENGLISH CAIRNS, 4 TO 12 DECEMBER 2002

STATUS OF WORLD WEATHER WATCH PROGRAMME IMPLEMENTATION AND OPERATION

(Submitted by the Secretary-General)

Summary and Purpose of Document

This document includes the results of the monitoring of the operation of the World Weather Watch as regards the availability of the observational data.

ACTION PROPOSED

The Commission is invited to review the results of the monitoring of the operation of the World Weather Watch as regards the availability of the observational data and to consider recommendations to overcome the deficiencies revealed by the monitoring results.

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Appendix: Draft text for inclusion in the general summary of CBS-Ext.(02) CBS-Ext.(02)/Doc. 5, APPENDIX

DRAFT TEXT FOR INCLUSION IN THE GENERAL SUMMARY OF CBS-XII

5. STATUS OF WORLD WEATHER WATCH IMPLEMENTATION AND OPERATION (agenda item 5)

Results of the monitoring of the availability of observational data

5.1 The Commission was informed of the results of the monitoring of the operation of the World Weather Watch. The monitoring activities include two types of monitoring exercises: the Annual Global Monitoring (AGM) and the Special MTN Monitoring (SMM). About 100 WWW centres provided monitoring results for the AGM exercises, which are carried out from 1 to 15 October each year. Eight MTN centres from Regions I, II, V and VI participated in the SMM exercises, which are carried out from 1 to 15 February, April, July and October.

[The percentages of SYNOP and TEMP reports received by MTN centres during the 1991 to 1999 AGM exercises and the February and April 2000 SMM exercises are given by Regions in Figures 1 and 2. The percentages of SYNOP and TEMP reports received from each station included in the Regional Basic Synoptic Networks (RBSNs) are shown in Figures 3 and 4. The percentages are calculated with reference to the numbers of reports required from the stations comprising the RBSNs. The number of surface (SYNOP) RBSN stations increased from 3948 to 4004 from 2000 to 2002. The number of upper-air (TEMP) RBSN stations decreased from 864 to 820 from 2000 to 2002. ]

5.2 The percentage of SYNOP reports available at MTN centres in comparison with the number of reports required from RBSN stations remained at the same level (about 75 per cent) during the period 2000-2002. There were still deficiencies in the availability of SYNOP reports from areas in Region I (51 per cent in July 2002), in Region III (62 per cent) and in Region V (68 per cent).

5.3 The percentage of TEMP reports available at MTN centres decreased from 65 per cent to 57 per cent during the period 1992-1999 and has increased from 57 per cent to 63 per cent since 1999. This evolution was mainly due to changes in the operation of the upper-air observation network in the northern part of Region II. The availability of TEMP reports was relatively satisfactory for the eastern and southern parts of Region II, the northern part of Region IV, some countries in Region V and the western part of Region VI. The availability of TEMP reports was generally insufficient for most of the other parts of the world.

[The daily average numbers of SHIP, TEMP SHIP, BUOY, AMDAR and AIREP reports received by MTN centres during the SMM exercises since 1996 are given in Figure 5. The daily average numbers of AMDAR reports received by MTN centres from the Australian area, the European area and other areas are given in Figure 6. The SMM centres do not yet monitor the aircraft reports presented in BUFR code.

The locations of the SHIP, BUOY, TEMP SHIP, AIREP and AMDAR reports received by MTN centres during the April 2000 SMM exercise are shown in Figures 7 to 10.]

5.4 There was no major evolution in the availability of SHIP and TEMP SHIP reports during the period 1996-2002. The numbers of AMDAR and BUOY reports have doubled since 1996. The availability of AIREP reports, which had been constant during the period 1996-200, decreased in 2001 and 2002. Except for BUOY reports, a large part of the reports from mobile stations are CBS-XII/Doc. 5, APPENDIX, p. 2 issued from the Northern Hemisphere. In the case of AMDAR reports, 60 percent of the reports are from Europe.

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List of Figures

Figure 1: Percentage of SYNOP reports received from each WMO Region during the 1991 to 2001 AGM, and the February, April and July 2000 to 2002 SMM, in comparison with the numbers of reports required from the RBSN stations

Figure 2: Percentage of TEMP reports received from each WMO Region during the 1991 to 2001 AGM, and the February, April and July 2000 to 2002 SMM, in comparison with the number of reports required from RBSN stations

Figure 3: Percentage of SYNOP reports received for 00, 06, 12 and 18 UTC from each RBSN station during the July 2002 SMM in comparison with the numbers of reports required

Figure 4: Percentage of parts A of SYNOP reports received for 00 and 12 UTC from each RBSN station during the July 2002 SMM in comparison with the numbers of reports required

Figure 5: Daily average number of reports received by SMM centres from mobile stations since 1996

Figure 6: Daily average number of AMDAR reports received by SMM centres since 1996

Figure 7: Locations from which SHIP reports were received for 00, 06, 12 and 18 UTC during the July 2002 SMM

Figure 8: Locations from which BUOY reports were received during the July 2002 SMM

Figure 9: Locations from which TEMP SHIP reports were received during the July 2002 SMM

Figure 10: Locations from which AIREP and AMDAR reports were received during the July 2002 SMM CBS-XII/Doc. 5, Figure 1

Percentage of SYNOP reports received during the 1991 to 2001 AGM, and the February, April and July 2000 to 2002 SMM in comparison with the numbers of reports required from the RBSN stations

1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 0 0 1 1 2 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 0 0 0 0 0 t- r- t- r- t- r- t- r- t- r- t- r- t- r- t- r- t- r- t- r- t- r- c p c p c p c p c p c p c p c p c p c p c p O A O A O A O A O A O A O A O A O A O A O A

Oct-91 Oct-92 Oct-93 Oct-94 Oct-95 Oct-96 Oct-97 Oct-98 Oct-99 Feb-00 Apr-00 Jul-00 Oct-00 Feb-01 Apr-01 Jul-01 Oct-01 Feb-02 Apr-02 Jul-02 Region I 31% 44% 45% 44% 44% 45% 45% 50% 52% 49% 47% 49% 49% 52% 50% 48% 50% 58% 53% 51% Region II 80% 80% 83% 83% 79% 81% 77% 79% 82% 77% 80% 79% 81% 82% 82% 81% 82% 82% 81% 81% Region III 50% 46% 50% 52% 53% 48% 56% 54% 59% 60% 64% 63% 64% 61% 63% 58% 63% 60% 61% 62% Region IV 62% 72% 73% 72% 71% 71% 78% 84% 83% 76% 82% 83% 85% 84% 82% 81% 83% 85% 85% 84% Region V 73% 69% 73% 73% 72% 51% 49% 52% 63% 59% 67% 66% 63% 60% 67% 67% 63% 64% 67% 68% Region VI 91% 90% 91% 88% 89% 90% 89% 94% 92% 92% 88% 91% 93% 92% 92% 91% 91% 87% 89% 90% Total 68% 71% 73% 71% 70% 69% 69% 72% 73% 71% 72% 74% 75% 74% 75% 74% 75% 75% 75% 75% CBS-XII/Doc. 5, Figure 2

Percentage of Parts A of TEMP reports received during the 1991 to 2001 AGM, and the February, April and July 2000 to 2002 SMM , in comparison with the number of reports required from RBSN stations 100%

1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 0 0 1 1 2 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -0 -0 -0 -0 -0 ct pr ct pr ct pr ct pr ct pr ct pr ct pr ct pr ct pr ct pr ct pr O A O A O A O A O A O A O A O A O A O A O A

Oct-91 Oct-92 Oct-93 Oct-94 Oct-95 Oct-96 Oct-97 Oct-98 Oct-99 Feb-00 Apr-00 Jul-00 Oct-00 Feb-01 Apr-01 Jul-01 Oct-01 Feb-02 Apr-02 Jul-02 Region I 20% 26% 27% 24% 29% 30% 32% 27% 29% 27% 25% 26% 31% 29% 28% 26% 29% 29% 31% 27% Region II 77% 75% 73% 71% 70% 63% 65% 60% 52% 53% 54% 57% 59% 62% 61% 62% 61% 64% 62% 63% Region III 28% 28% 26% 35% 32% 21% 26% 35% 35% 44% 40% 36% 40% 39% 44% 41% 41% 39% 34% 36% Region IV 80% 81% 84% 76% 82% 83% 86% 84% 84% 82% 83% 84% 86% 84% 83% 82% 83% 83% 84% 84% Region V 52% 52% 51% 54% 54% 55% 56% 52% 57% 56% 55% 57% 58% 59% 58% 57% 58% 63% 64% 63% Region VI 82% 79% 73% 68% 73% 66% 68% 72% 70% 70% 71% 72% 73% 72% 72% 71% 72% 74% 75% 75% Total 66% 65% 64% 62% 64% 60% 62% 59% 57% 58% 58% 59% 61% 62% 61% 61% 61% 63% 63% 63% CBS-XII/Doc. 5, Figure 3 CBS-XII/Doc. 5, Figure 4 CBS-XII/Doc. 5, Figure 5

Daily average number of reports received by SMM centres from mobile stations since 1996

96 7 97 7 97 8 98 8 98 9 99 9 99 0 00 0 00 1 01 1 01 2 02 2 t- -9 - -9 t- -9 - -9 t- -9 - -9 t- -0 - -0 t- -0 - -0 t- -0 - -0 c n pr ul c n pr ul c n pr ul c n pr ul c n pr ul c n pr ul O Ja A J O Ja A J O Ja A J O Ja A J O Ja A J O Ja A J

Oct- Apr- Oct- Apr- Oct- Feb- Apr- Feb- Apr- Oct- Feb- Apr- Oct- Feb- Apr- Jul-98 Jul-99 Jul-00 Jul-01 Jul-02 96 97 97 98 98 99 99 00 00 00 01 01 01 02 02

SHIP reports (00, 06, 12, 18 UTC) 2705 2612 2489 2529 2598 2563 2484 2527 2703 2801 2777 2719 2793 2691 2631 2513 2870 2549 2603 2797 TEMP SHIP reports 16 17 16 21 25 15 19 13 25 18 16 18 14 19 19 17 18 18 17 19 BUOY reports 6046 5934 6878 7010 7256 6906 6573 5715 7628 8094 8405 9215 9542 10436 9613 10374 10919 11337 11620 11924 AMDAR reports 9211 9526 10044 9522 9468 12164 13813 14361 16801 16073 16642 15531 17252 19728 19164 21385 17886 19441 18651 18358 AIREP reports 4064 4210 4514 4421 4673 4573 4144 4309 4573 4031 4294 4484 4278 3935 3751 4128 3475 3149 3270 3561 CBS-XII/Doc. 5, Figure 6

Daily average number of AMDAR reports received by SMM centres since 1996

6 7 7 7 7 8 8 8 8 9 9 9 9 0 0 0 0 1 1 1 1 2 2 2 -9 -9 -9 l-9 -9 -9 -9 l-9 -9 -9 -9 l-9 -9 -0 -0 l-0 -0 -0 -0 l-0 -0 -0 -0 l-0 ct n pr u ct n pr u ct n pr u ct n pr u ct n pr u ct n pr u O Ja A J O Ja A J O Ja A J O Ja A J O Ja A J O Ja A J Feb- Feb- Feb- Feb- Oct-96 Oct-97 Apr-98 Jul-98 Oct-98 Apr-99 Jul-99 Apr-00 Jul-00 Oct-00 Apr-01 Jul-01 Oct-01 Apr-02 Jul-02 99 00 01 02 From Australian zone 4284 5546 4118 3982 4268 4533 4933 4948 4248 3976 4476 5112 4262 4502 4812 1255 1404 971 999 From European zone 2448 2100 2586 2990 5188 6516 6203 8504 8085 8107 6854 7414 9557 8595 10445 10956 12768 12378 11159 From outside Australia and Europe 2480 2398 2818 2496 2707 2764 3225 3349 3740 4559 4200 4725 5908 6067 6129 5675 5269 5302 6200 All reports 9211 10044 9522 9468 12164 13813 14361 16801 16073 16642 15531 17252 19728 19164 21835 17886 19441 18651 18358 CBS-XII/Doc. 5, Figure 7 CBS-XII/Doc. 5, Figure 8 CBS-XII/Doc. 5, Figure 9 CBS-XII/Doc. 5, Figure 10 CBS-XII/Doc. 5, Figure 10