Arctic Circle 2015, October 16-18, Reykjavík - Iceland MeteoMet Project: Metrology Activities in...
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Transcript of Arctic Circle 2015, October 16-18, Reykjavík - Iceland MeteoMet Project: Metrology Activities in...
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
MeteoMet Project:Metrology Activities in Ny-Ålesund
(Svalbard)
Chiara Musacchio Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ItalyGuest Researcher and Project Management, MeteoMet Project
Andrea Merlone, Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, Italy
Marion Maturilli, Jürgen GraeserAlfred Wegener Institute for Polar and Marine Research (AWI), Potsdam, Germany
Vito Vitale, Angelo ViolaIstituto di Scienze dell'Atmosfera e del Clima - (ISAC-CNR), Bologna and Roma, Italy
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Task 3.5: Construction of a facility for in situ traceable calibration of weather stations including for special purposes and under extreme environmental conditions (high mountains, polar regions)
EDIE-1 - 2014
Arctic
campaign
Ny-Ålesund - International Centre for Arctic Research
research stations from 11 nations
Atmospheric ResearchGlaciology
Marine BiologyEcosystem
Climate Change
…
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
•temperature and pressure controlled simultaneously and independently
•temperature calibrations in air
•equipped with reference sensors directly traceable to national standards
•obtain meteorological data with well defined calibration uncertainty.
Transportable devices EDIE Earth Dynamics Investigation
Experiment
Generation of traceable values of temperature and pressure in the Earth surface range
Evaluation of mutual influences on sensors – Covariance analisys
steel cylindersvacuum
test zone
copper cylinder
cooling coil with thermostatic fluid
Pressure: 500-1100 hPa, Temperature: -35 °C to 50 °C. Target uncertainty (k=2) of pressure and temperature are 10 Pa and 0.076 °C.
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Vertical profiles of T, humidity and wind
contributing to
Daily Radiosonde Daily Radiosonde LaunchesLaunches
Atmospheric ObservatoryAtmospheric Observatoryatmospheric measurements contributing to several international networks
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
● Reference pressure meter Baratron MKS622
● Reference thermometer GS01 (metallic-enclosed Pt100)
The ground instrumentation used in the Ny-Ålesund GRUAN procedures has been calibrated during the MeteoMet Arctic campaign
pressure
air temperatureGround-based reference observing system
Calibration RangeTemperature -30 °C to 10 °C Pressure 95 kPa to 105 kPa
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Calibration curves
Uncertainty contribution PT100 A PT100 B PT100 CTemperature reference 0.011 °C 0.011 °C 0.011 °C
Chamber uniformity 0.006 °C 0.009 °C 0.019 °CSensor under calibration 0.007 °C 0.008 °C 0.014 °C
Calibration curve 0.026 °C 0.017 °C 0.018 °CStandard Uncertainty 0.029 °C 0.022 °C 0.026 °CExpanded Uncertainty
(k=2)0.058 °C 0.044 °C 0.052 °C
2)()( cTbTaTTTTTTc
2),( eTdPTcTbPaPTPPc
Uncertainty contributionPressure reference 0.3 Pa
Chamber uniformity 2.5 PaSensor under calibration 0.3 Pa
Calibration curve 26 PaStandard Uncertainty 26 PaExpanded Uncertainty
(k=2)52 Pa
-30-15
010
-200
-180
-160
-140
-120
-100
95 96 97 98 99100 101
102103
104105
P
/ Pa
T / °CP / kPa
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
The Climate Change Tower in Ny Ålesund
-30
-25
-20
-15
-10
-5
0
5
10
15
0,100 0,200 0,300 0,400 0,500 0,600
T/
°C
voltage / V
Uncertainty contribution PT100 D PT100 E PT100 F TH Vaisala Temperature reference 0.007 °C 0.007 °C 0.009 °C 0.004 °C Chamber uniformity 0.009 °C 0.009 °C 0.019 °C 0.011 °C Sensor under calibration 0.007 °C 0.008 °C 0.014 °C 0.011 °C Calibration curve 0.026 °C 0.017 °C 0.018 °C 0.003 °C
Standard Uncertainty 0.014 °C 0.023 °C 0.017 °C 0.012 °C Expanded Uncertainty
(k=2) 0.027 °C 0.046 °C 0.033 °C 0.025 °C
Vaisala Thermohygrometer
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Main outcome
Open the way for further cooperation...
Improve accuracy
Define Uncertainty Budget
Range of calibration cover measurement condition
Evaluate mutual influence of quantity (Temperature on pressure measurement)
Uncertainty contribution PT100 D Temperature reference 0.007 °C Chamber uniformity 0.009 °C Sensor under calibration 0.007 °C
Calibration curve 0.026 °C Standard Uncertainty 0.014 °C
Expanded Uncertainty (k=2) 0.027 °C
-30-15
010
-200
-180
-160
-140
-120
-100
95 96 97 98 99100 101
102103
104105
P
/ Pa
T / °CP / kPa
On-site dedicated calibration
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
The experience achieved by MeteoMet and the Thermal Metrology expertise from NMI staff, as the starting point for the creation of a Metrology laboratory in the Ny Ålesund International Centre for Arctic Research.
Facility for temperature sensor calibration Pressure control system for pressure sensor calibration
Permafrost TemperatureSurface Air Temperature
Sea Temperature
Dedicated calibration devices and procedureTraceability to primary standards of the measurements
Special dedicated Calibration chamber EDIE - Calibration of temperature sensor in air
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
A liquid bath for the calibration of sea, ice and soil thermometers
Total target uncertainty: few millikelvin
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Experience achieved for the Boltzmann experiment
A liquid bath for the calibration of sea, ice and soil thermometers
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
A liquid bath for the calibration of sea, ice and soil thermometers
Stability and uniformity of few millikelvin
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Thank you for the attention
Arctic Circle 2015, October 16-18, Reykjavík - Iceland14
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Albedo effect on temperature
Up to now, the influence of the albedo on air temperature measurements using AWSs in high mountain sites has not been measured following metrology considerations, thus evaluation correction curves and/or uncertainty components to the air temperature data.
This influence needs to be studied by performing traceable measurements of the albedo and determining reliable uncertainty calculations.
Task 3.5: High mountains observations: permafrost and albedo
Arctic Circle 2015, October 16-18, Reykjavík - Iceland
Permafrost• Permafrost thermal data is a key component for
validating hydroclimatic models, land surface models, and climatic change models.
• Permafrost is among the few measurable paleo-climatic elements.
• Establish the best practice for permafrost temperature sensors calibration and measurements techniques.
• A laboratory facility enabling the simulation of a permafrost column of approximately 2 m will be manufactured by INRiM.
• On-site campaing 2015
ARPA alpine site (3000 m) Permaforst Monitoring Network
Task 3.5: High mountains observations: permafrost and albedo
Arctic Circle 2015, October 16-18, Reykjavík - Iceland 17
DTM5080 Pt100 A
analog Pt100 CDTM5080 Pt100 B
DIGIQUARTZ 6000 pressure meter
Calibration RangeTemperature -30 °C to 10 °C Pressure 95 kPa to 105 kPa
Inside of EDIE 1 sensors under calibration and reference standard