Country report of N.A.Meththasinghe Meteorological Officer - - PowerPoint PPT Presentation

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Country report of N.A.Meththasinghe Meteorological Officer - - PowerPoint PPT Presentation

Dec 13, 2022 226 likes •645 views

JMA/WMO Training workshop on Calibration and maintenance of Meteorological Instruments in RA II (Asia) Headquarters of JMA, Tokyo and Regional instruments Centre (RIC)- Tsukuba ,Japan 19 -22 February 2013 Country report of N.A.Meththasinghe

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N.A.Meththasinghe

Meteorological Officer Department of Meteorology – Sri Lanka

Country report of

JMA/WMO Training workshop on Calibration and maintenance of Meteorological Instruments in RA II (Asia)

Headquarters of JMA, Tokyo and Regional instruments Centre (RIC)- Tsukuba ,Japan 19 -22 February 2013

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Land Area: 65,610 Sq. km Population: 19.6 Million

  • Pop. Density:

309 per sq.km Literacy rate: 91.8 % Ethnic Mix:- Sinhalese: 74 % Tamil: 18 % Muslim: 7 % Others: 1 %

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TSUNAMI

death toll > 31,000 missing > 6,000 homeless > 450,000

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Worst Train Tragedy in the History

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Natural Beauty

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Highlands of Sri Lanka

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Golden Beaches………..

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Scenic Beauty

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Buddhism is the religion of most Sri Lankans

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Elephants In Sri Lanka

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Elephant Orphanage Pinnawela, Sri Lanka

The original objective of establishing the orphanage inclined more towards tourism, but is soon became a conservation and educational centre. With the help of local and foreign elephant experts, Pinnawela started a scientific captive-breeding programme for elephants.

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Sri Lanka’s hill capital KANDY (488 m from the msl) is, perhaps, its most beautiful town. The focal point of the town is the golden- roofed Dalada Maligawa, where the sacred tooth relic of the Buddha is enshrined.

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Kandy Esala Perahara or the Annual Pageant of the Temple of Tooth Relic

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Dancers at the Kandy Esala Perahera

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Sri Lanka is famous for its ….TEA ….

Tea, rubber, and coconut exports dominated commercial activity in the country up to 1970s.

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Topography and Climate

Mild Climate Average Rainfall: 1860 mm/year Range of rainfall: 950 – 6000 mm Mean Temperature: 27.5 C (lowlands) Lower Temperatures in the highlands

Topography: Between 5o 55' to 9o 51' North latitude Between 79o 42' to 81o 53' East longitude Characterized by South Central Highlands

  • Mt. Pidurutalagala – 2524 m a msl
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CLIMATOLOGICAL SEASONS

  • There are four Climatological Seasons
  • Southwest Monsoon

(May to September)

  • Northeast Monsoon

(December to February)

  • 1st Inter Monsoon

(March & April)

  • 2nd Inter Monsoon

(October & November)

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22 Principal Meteorological Stations 38 Agrometeorological Stations 375 Raingauge Stations

Meteorological Station Network

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38 automated weather stations

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AWOS

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IMPROVED OBSERVATION NETWORK WITH 38 AWS

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Upper Air Observations – Pilot Balloon

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Upper Air Observations – Radar/Radiosonde

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Surface observation

  • The 22 meteorological offices, observing Atmospheric

pressure, air temperature humidity, wind direction and speed,cloud conditions, visibility, weather.

  • These data used for weather forecasting; are also

archived and processed for climatological values.

Upper air observation

  • Three times a day, Pilot balloons ; from Colombo, Mannar,

Polonnaruwa, Hambantota

  • Once a day, Radar Radiosond balloon ; from National

Meteorological Centre (NMC) at Colombo around 16:30

  • SLST. It reads atmospheric pressure, temperature,

relative humidity and winds.

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Instruments used in measurements

Pilot balloon observations :- Optical theodolite Garat German Upper air observations :- Radar equipment Japan Radiosonde equipment Japan Sun shine :- Campbell stokes sun shine recorder Mk IV England Global radiation :- Pyranometer USA with NRG data logger Air Temperature :- Ordinary thermometer Maximum thermometer England Minimum thermometer Temperature range

  • 20oC to 55oC
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Soil Thermometers :- Temperature range -10oC to 55oC England Wind :- Cup counter Anemometer Casella,Munro England Electrical Anemograph MK IV Munro England Wind Vane Locally made Pressure :- Barometer kew type England, South Africa Digital Barometers Casella, England CPG 2400 mensor USA Self recording instruments :- Barograph Open scale, Micro England, Japan, Germany,USA Thermograph England, Japan, Germany Hygrograph England, Japan, Germany Evaporation :- Class A evaporation pan Locally made

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Role of Instrument Division

  • Maintenance & calibration of instruments with the

conformity of standards of practices and providing

  • f calibrated instruments to observation centers.
  • Routine inspections of all instruments at

meteorological stations, agrometeorological stations and rainfall stations.

  • Make arrangements to prepare necessary supporting

equipments and the housing for the meteorological instruments.

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Testing, calibrating and Comparision of Instruments

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