INTERCOMPARISON BETWEEN RA VI ( France, ) AND RA II (Australia) REGIONAL INSTRUMENT CENTRES ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA Slovakia, Slovenia

4 W METHOD W W W W HY HO ITH HAT

WHY METROLOGY LABORATORIES MANUFACTURERS / PUBLIC NATIONAL LABORATORY BIPM METROLOGY PYRAMID

WHY NMHS AWS / STATION RIC WMO METEOROLOGY PYRAMID

WHY DISSEMINATIONTRACEABILITY INTERCOMPARISON

WHY WMO N°8 Guide to Meteorological Instruments And Methods of observation: « Intercomparisons of instruments and observing systems, together with agreed quality control procedures, are essential for the establishment of compatible data sets. » Term Of Reference for RIC  Capability  “(f) A RIC must participate in, or organize inter-laboratory comparisons of standard calibration instruments and methods, »

WHO ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA

WHO Slovak Hydrometeorological Institute Jeséniova Bratislava Slovakia

WHO Range: -30°C to +50°C, Method of immediate comparison, Reference standard: SPRT Rosemount, model 162CE, Resistance bridge: Hart Scientific, model 1560, 2560 and 2562 for PRT calibrations, Standard resistors: 25, 100  Tinsley 5685A, Liquid bath Julabo FP40-HP, Best Measure Capability 0.05°C. TEMPERATURE

WHO Traceability to National Standard, Range: 10% RH to 95% RH, Method of immediate comparison, Monitoring of the calibration process, Best measure capability 2.5% RH HYGROMETRY

WHO  Traceability to National Standard,  Range: 600 hPa to 1100 hPa,  Method of immediate comparison,  Best Measure Capability is 0.11 hPa PRESSURE DH Instruments PPC2+

WHO ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA Environmental Agency of the Republic of Slovenia Vojkova 1b 1000 Ljubljana Slovenia

WHO ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA HYGROMETRY

WHO ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA TEMPERATURE

WHO ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA PRESSURE

WHO QuantitiesRangeBMC (k=2) Temperature Water triple point0.01 °C1 mK Gallium melting point °C1.5 mK Resistance thermometers-40 °C ÷ 50 °C15 mK Liguid-in-glass thermometers -20 °C ÷ 50 °C70 mK Thermographs-20 °C ÷ 0 °C 0 °C ÷ 50 °C 0.3 °C 0.2 °C Relative humidity10 % ÷ 95 %3 % Air pressure600 hPa ÷ 1200 hPa5.4·10-5·p + 5 Pa Air quality quantities CO concentration0 -15 ppmv0.07 ppm · c CO SO2 concentration ppbv0.8 ppb · c SO2 NO concentration ppbv0.9 ppb · c NO NO2 concentration ppbv1.5 ppb · c NO2 O3 concentration ppbv2.6 ppb · c O3 ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA

WHO Bureau of Meteorology GPO Box 1289 Melbourne VIC 3001 Australia Phone Fax

WHO PRESSURE

WHO

DomainType of standardTypeManufacturerRangeU (k=2) 95% TemperatureITS-90 fixed pointsHg, H 2 O, Ga, InIsotech-38 – 156 o C20 mK PressureDead Weight TesterGas piston gaugeRuska500 – 1100 hPa2 Pa HumidityDew Point HygrometerChilled mirrorEastern GeneralDP o C DP

WHO Météo-France DSO/LM 7 Rue Teisserenc de Bort TRAPPES France Phone Fax

WHO HUMIDITY  11 % : LiCl  33 % : MgCl  54 % : N 2 O 6 Mg  75 % : NaCl  95 % : K 2 SO 4  Uncertainty: 2.4 %

WHO  2 temperature bench Humidity generation with a circulating bench called “2 temperature bench”  From -50°C to +50°C  From 0% to 99%  Uncertainty 1.6 %.U

WHO PRESSURE  range 500 to 1060 hPa  Uncertainty: P Pa.

WHO TEMPERATURE  -50 à +50°C  ASL resistor bridge  Uncertainty 0.03 °C

WITH Set of instruments developed by Australian Bureau

WITH THERMOMETER Instrulab 4312A (PT100)

WITH HYGROMETER Vaisala HM-70 humidity sensor

WITH BAROMETER PTB 220A 3 cells

WITH NORMALISED BIAS B 1 and B 2 are respectively the bias (True value – Instrument value) U 1 and U 2 are the associated expanded uncertainties.

WHAT PRESSURE PRESSURE (hPa) BIAS (hPa)

WHAT HUMIDITY U (%) BIAS (%)

WHAT TEMPERATURE  (°C) BIAS (°C)

CONCLUSION RIC’s UNCERTAINTIES PRESSURETEMPERATUREHUMIDITY AUSTRALIA SLOVENIA SLOVAKIA FRANCE

CONCLUSION INSTRUMENTS STABLE SUITABLE

CONCLUSION PROCEDURES AND METHODS ARE SUITABLE FOR INTERCOMPARISONS

CONCLUSION ORGANISED BY RIC INTERCOMPARISONS PROMOTED BY WMO

THANKS

THANKS ENVIRONMENTAL AGENGY OF THE REPUBLIC OF SLOVENIA

THANKS

THE END ?

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