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Climate workshop Freetown, Sierra Leone 23-25 April 2012

Climate workshop Freetown, Sierra Leone 23-25 April 2012. Fatou Sima sima_fatou@yahoo.com Meteorologist/Head of Climatology Dept. of Water Resources 7 Marina Parade Banjul, The Gambia Mobile: 00 (220) 799 38 55. Overview of presentation. Introduction Structure of the DWR

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Climate workshop Freetown, Sierra Leone 23-25 April 2012

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  1. Climate workshopFreetown, Sierra Leone 23-25 April 2012 Fatou Sima sima_fatou@yahoo.com Meteorologist/Head of Climatology Dept. of Water Resources 7 Marina Parade Banjul, The Gambia Mobile: 00 (220) 799 38 55

  2. Overview of presentation • Introduction • Structure of the DWR • Network of Met & Rainfall stns • Brief responsibilities of Climate staff • Objective of the workshop • Network of Gauge stations & Meteorological stations • PA’s with associated Meteorological stations • Example of most significant events • Observed extreme events at Meteorological stations associate with Pas • Comparison of model performance for Tmly & Tann • Conclusion/Suggestion

  3. Introduction-Brief Fig 1: The Gambia • Situated, western coast of Africa, btw Lat 13 & 14oN & Long 13 & 17oW. • Occupies a land area of 10,690 square km • Surrounded by Senegal to the E, S & N & Atlantic Ocean on the W part • Within the Sahelian Region and has a soudano climate • 2 seasons; dry: Nov-April, Wet: May-Oct (unimodal). •  Pop: 1.5million • Dry season: avg T’s can reach  18 to 30oC; RH  68 % along the coast & 41% inland • Wet season: avg T’s fluctuate  23 to 33oC RH 77%. • Rainfall amounts vary from 850 to 1,200 mm ( ROTG, 2003).

  4. Table 1: Structure of The Gambia NMHS National Meteorological & Hydrological Services Meteorology Hydrology Central Forecast Office Surface Water Monitoring Climatology Research& Applications Station Network Salinity Level Analysis & Publication of Climatological report Monitoring status of human, material & equipment at Met. stns.Data collection & downloading Met. Parameters from Automatic recorders Data verification, Validation & storage Treatment of data requests both National & International

  5. Fig 2: Responsibilities of climate staff-Brief Meteorological observer taking weather observation Climatological data verification Climatological data storage (CLICOM format) Climatological data storage (Excel format) Climatological data analysis/publication

  6. Objective of workshop • Provide us with tools that can be use to give concise Warnings to reduce the vulnerability of our Socio-economic sectors/protected areas, which are so sensitive to the negative impacts of Extreme Weather/Climate events, for the subregion.

  7. Sources of Meteorological data • 10 land surface stations • 24-hour stations (2) • daylight stations (8) • Upper air station, Marine station, Radar (0) • Autographic recorders • Rainfall (3) • Sunshine (10) • Wind, Temperature, Humidity (0) • Satellite Reception • Started in 1979 • MSG installed & operational since June 2005 and upgraded in 2010 • SADIS 2G Numerical Weather Products

  8. Station History of the Gambia Meteorological Network & rainfall stations * The Gambia Met services: CFO, Climate, R & A , Network* 15 Met. stations, now reduced to 10 from year 2008

  9. Fig 4: Network of Gauge stations (top); Network of Meteorological stations (below). * 10 synoptic & 38 rainfalls stns * Not associated with Pas (24 hr. stn)

  10. Table 2: PAs with associated Meteorological stations

  11. Some Observed significant Climate events Fig 5: Yundum Airport, WR ; Lat: 130 35N, Long: 160 63W ; Alt 33m

  12. Fig 6: Temperatures (0C)

  13. Fig 7: COOL DAYS & NIGHTS (10p)

  14. Fig 8: WARM DAYS & NIGHTS (90p)

  15. Fig 9: RR events_Basse, URR; Lat: 130 32N, Long: 140 22W, Alt 4m

  16. Fig 10: Temperatures (0C)

  17. Fig 11: COOL DAYS & NIGHTS (10p)

  18. Fig 12: WARM DAYS & NIGHTS (90p)

  19. Fig 13: Observed significant events at Meteorological stations associate with PAs Banjul Yundum-Airport Jenoi KerewanSapu Drought Drought Drought flood flood flood flood Drought flood Drought

  20. Comparison of model performance for mly & annual Tmean (0C) to 2100 for the Gambia Fig 14: All the 3 models used in the Study show increase in temperature of about 0.5 in 2010 to about 3.0 to 4.0oC by 2100. The BMRC Model shows the largest increase of about 40C. Figure 14. Model Projections for monthly mean temperatures (0C) for The Gambia to 2100 Fig 15: Except for the BMRC Model other models show that warming of the atmosphere will be almost the same as current climate. The BMRC model shows that temperatures will increase by about 5oC above current climate. Figure 15. Model Projections for annual mean temperatures (0C) for The Gambia to 2100

  21. Conclusion/suggestion • RR important b4 1968 and after 1968. • Warm T’s Days & Nights; (warming ); Cool days & Nights ( cooling ) as the years progressed. • Model performance also show in T’s • Onset season length decreases in recent normal. • Believe this workshop will assist in enhancing our Weather/ Climate Bulletins, since the tools used will provide us with many relevant products. • Good networking is essential so as to share results with fellow participants from adjacent countries. This will enable us study and note any important TRENDs of interest. • PRECIS: Started monitoring rainfall using the models provided by the Hadley centre. Stopped working due to long hours of Power breakdown while PRECIS is working. PRECIS started, but its indicates no experiments done. • Among my ambition today, is to generate and provide PRECIS products for the Gambia and even beyond. need more training on PRECIS inorder to acquire better usage & understanding. This will definitely help in addressing climate change challenges especially for developing countries.

  22. THANK YOU MERCI OBRIGADO SUKRAN

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