1. No category

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