presentation pdf
Transcription
presentation pdf
Andrea Merlone METEOMET Traceability of Environmental Variables in the Himalayas Andrea Merlone Istituto Nazionale di Ricerca Metrologica INRiM, Torino, Italy Presented by: Robin Farley, MBW Calibration AG Andrea Merlone • • • • MeteoMet is a Joint Research Project Funded by the European Metrology Research Programme (EMRP). Started in October 2011, runs until 2017. Groups a wide consortium of European National Institutes of Metrology, Universities, Research Centres and Manufacturers. • Scope of the project is to study and implement methods, instruments and procedures for a robust traceability of climate and meteorological records. Andrea Merlone • EMRP Project context, ra0onale and objec0ves – Climate measurement calibra/on uncertainty evalua/on – Improving humidity sensors and calibra/on methods – Calibra/on of reference radiosondes – Calibra/on of automa/c weather sta/ons – Robustness of the historical temperature measurement data Andrea Merlone • EMRP Tasks (1) – 3.1 Wind speed measurements, calibra/on and uncertainty evalua/on • 3.1.1 Development of a method for establishing traceability for wind speed measurements – 3.2 Improving humidity sensors and calibra/on methods • 3.2.1 A traceable TDLAS hygrometer • 3.2.2 Improvements of molecular spectral line data at 1.4 μm • 3.2.3 Intercomparison of field humidity sensors of different types • 3.2.4 Water vapour formula improvement • 3.2.5 Novel methods and instruments for atmospheric humidity measurement. Andrea Merlone • EMRP Tasks (2) – 3.3 Calibra/on of reference radiosondes – 3.4 Calibra/on of automa/c weather sta/ons • 3.4.1 Traceable protocols for ground based measurements • 3.4.2 Solar radiaJon effect • 3.4.3 Development of faciliJes for laboratory and in situ simultaneous calibraJon of temperature, humidity and pressure sensors in weather staJons • 3.5 Robustness of the historical temperature measurement data – 3.5.1 Development of the calculaJon model for instrumental uncertainty evaluaJon of historical data and with respect to ITS-‐90. – 3.5.2 HomogenisaJon approaches to develop historical temperature Jme-‐ series. Andrea Merlone • METEOMET Impact – InternaJonal communicaJon and cooperaJon – Liaison with WMO, CIMO, WMO-‐GRUAN, ISTI – Revision of GRUAN manual and guide to adopt GUM (uncertainty) • JRP coordinator was awarded the EURAMET “Impact prize” in 2013 with the following moJvaJon: “The MeteoMet project has achieved significant impact with the science undertaken within it, but also in bringing two scien/fic communi/es together to collaborate on problems that have far reaching implica/ons for us all” (EURAMET 2013). Andrea Merlone • 3.4.3 Development of faciliJes for laboratory and in situ simultaneous calibraJon of temperature, humidity and pressure sensors in weather staJons Task 3.4.3 The aim of this task has been to design and set up a new primary climate chamber for traceable in-situ calibration of weather stations. The work contributed in the proposal of methods and protocols for ensuring the traceability of weather and climate measurements from distributed, remote, high altitude areas. A reduced dimension chamber enabling simultaneous generation of a wide range of temperatures and pressures, has been positioned in the Pyramid Laboratory/Observatory located at 5,050 m altitude at the base of Mount Everest in Nepal. Andrea Merlone Mountains are barometers of climate change. Understanding how climate change affects mountains, and learning how to manage and mitigate any negative effects, is vital for all of us, wherever we live. FAO focus on mountains by J Ross and T Hofer High mountain regions have gained growing attention due their sensitivity in providing a first indication of climate change, thanks to the unique environmental conditions and lack of human impact. EDIE-‐1 Andrea Merlone Transportable calibrationfacility developed out at INRiM, Torino Simultaneous calibration of temperature, pressure and humidity for weather sensors Thermal stabilization: about 5 hours Temperature uniformity (worst value at -25 °C): vertical 3 mK/cm; radial 2 mK/cm Thermal stability: better than 5 mK at every temperature. Andrea ! August 2013 EDIE2 goes to Kathmandu first… Merlone Andrea Merlone ! Then to Lukla (2800 m ) by small plane ! …then to Namche by helicopter Andrea Merlone Andrea Merlone ! 13 September a cold rainy day at the Syangboche “airport” 3750 m (Namche Bazar) Andrea Merlone Kala Patthar (5,550 m) Changri Nup (5,750 m) Andrea Merlone Pyramid (5,050 m) NCOP-P (5,079 m) Periche (3,560 m) South Col (7,986 m) Syanboche (3,900 m) Namche (3,560 m) Lukla (2,660 m) MeteoMet and SHARE project for the data traceability on the Kumbu valley and Nepalese side of Everest Andrea Merlone Assembling the calibraJon chamber and auxiliary equipment in the Everest Pyramid. Andrea Merlone EDIE Temperature calibraJon uncertainty budget Uncertainty contribution Temperature reference Pt100 calibration unc. Datalogger resolution Short term stability Repeatibility Chamber uniformity Sensor in calibration Resolution Repeatibility Calibration curve Residual Standard Uncertainty Expanded Uncertainty (k=2) Standard uncertainty 0.02 °C 0.1 mΩ Distribution Gaussian Rectangular 0.005 °C 0.0088 °C 0.12 °C Gaussian Rectangular 0.01 °C 0.007 °C Rectangular Gaussian 0.021 °C Gaussian Sensitivty - 0.4 Ω/°C Contribution to standard uncertainty 0.01 °C 0.00014 °C 0.005 °C 0.0088 °C 0.038 °C - 0.006 °C 0.007 °C 0.021 °C 0.047 °C 0.094 °C Andrea Merlone EDIE Pressure calibraJon uncertainty budget Uncertainty contribution Pressure reference Additel 681 calibration unc. Additel resolution Repeatibility Sensor in calibration Resolution Repeatibility Calibration curve Residual Standard Uncertainty Expanded Uncertainty (k=2) Standard uncertainty Distribution Contribution to standard uncertainty 15 Pa Gaussian 10 Pa Rectangular 6 Pa 392 Pa Rectangular 113 Pa 1 Pa 403 Pa Rectangular Rectangular 0.6 Pa 117 Pa Gaussian 3 Pa 163 Pa 326 Pa 3 Pa 7.5 Pa Andrea Merlone Andrea Merlone Future plans In Pyramid: Extend the system to allow calibration of temperature sensors to thermometers used to measure: ice, glaciers, lake temperature, soil, permafrost… In Kathmandu Establishing a calibration laboratory at the Nepal Academy of Science and Technology (NAST) for electrical and thermal quantities mainly addressing environmental and climate measurements. Andrea Merlone Meeting at NAST for planning the feasiblity of a calibration laboratory for environmental observations in Nepal Andrea Merlone Wednesday, 22 April Thank You Andrea Merlone