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TUCAVOC: A Novel Automated Tool for Uncertainty Calculation for Atmospheric VOC Measurements
by Dr. Stefan Reimann, Mr. Paul Schlauri, Mr. Matthias Hill, Mr. Lionel Constantin, Dr. Martin K. Vollmer, Mrs./Ms. Sonja Mueller, Mrs./Ms. Maitane Iturrate-Garcia, Mr. Tobias Buehlmann, Mrs./Ms. Celine Pascale

Abstract

Volatile organic compounds (VOCs) are precursors of secondary organic aerosols and tropospheric ozone and they indirectly contribute to radiative forcing. Their measurement is normally performed by the challenging gas chromatography technique, where the calculation of uncertainties is based on sev-eral independent factors. Within the EURAMET-EMPIR project MetClimVOC, we are developing the user-friendly simplified digital tool TUCAVOC (Tool for Uncertainty Calculation for Atmospheric VOC Measurements), which allows data providers calculating the uncertainty propagation, following the prin-ciples established in the GUM (Guide to the Expression of Uncertainty in Measurement, GUM; JCGM 100:2008). For this uncertainty calculation, different methods are in use for atmospheric VOC meas-urements. However, in the new Guideline for Measurements of VOCs, which is under review at WMO, a common approach will be enforced. This is the basis for the programme, TUCAVOC, which supports responsible authorities and end-users in submitting comparable uncertainty estimates. TUCAVOC is a novel approach to tackle the problem of contributing uncertainties to measurement data. This infor-mation can then be used not only to check for the quality itself but also as input variable to further modelling approaches, such as positive matrix factorization (PMF) or inverse modelling for emission verification. This will create impact through the homogenisation of the uncertainty calculations that are provided by the measurement sites to European and global databases. The programme has a potential to be used not only for VOCs but also for measurements of other air pollutants and greenhouse gases as well as for pollutants in other environmental compartments.

Poster

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Topic : Theme 2: State of play in integrated approaches for advanced GHG emission estimates and the way forward to operational services.
Reference : T2-B16

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