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|Title:||Soot Reference Materials for instrument calibration and intercomparisons: a workshop summary with recommendations|
|Authors:||BAUMGARDNER Darrel; POPOVICHEVA O; ALLAN J; BERNARDONI Vera; CAO J; CAVALLI Fabrizia; COZIC J; DIAPOULI E.; ELEFTHERIADIS K.; GENBERG P.j; GONZALEZ C; GYSEL M; JOHN A.; KIRCHSTETTER T.w.; KUHLBUSCH Thomas A.j.; LABORDE M; LACK D.; MULLER T.; NIESSNER R.; PETZOLD A; PIAZZALUNGA A.; PUTAUD Jean-Philippe; SCHWARZ J; SHERIDAN P; SUBRAMANIAN R; SWIETLICKI Erik; VALLI Gianluigi; VECCHI R; VIANA M.|
|Citation:||ATMOSPHERIC MEASUREMENT TECHNIQUES vol. 5 no. 8 p. 1869–1887|
|Publisher:||COPERNICUS GESELLSCHAFT MBH|
|Type:||Articles in periodicals and books|
|Abstract:||Soot, which is produced from biomass burning and the incomplete combustion of fossil and biomass fuels, has been linked to regional and global climate change and to negative health problems. Scientists measure soot using a variety of methods in order to quantify source emissions and understand its atmospheric chemistry, reactivity under emission conditions, interaction with solar radiation, influence on clouds, and health impacts. A major obstacle currently limiting progress is the absence of established standards or reference materials for calibrating the many instruments used to measure the various properties of soot. The current state of availability and practicability of soot standard reference materials (SRMs) was reviewed by a group of 50 international experts during a workshop in June of 2011. The workshop was convened to summarize the current knowledge on soot measurement techniques, identify the measurement uncertainties and limitations related to the lack of SRMs, and identify attributes of SRMs that, if developed, would reduce measurement uncertainties. The workshop established that suitable SRMs are available for calibrating some, but not all, measurement methods. The community of single-particle sootphotometer (SP2) users identified a suitable SRM, fullerene soot, but users of instruments that measure light absorption by soot collected on filters did not. Similarly, those who use thermal optical analysis (TOA) to analyze the organic and elemental carbon components of soot were not satisfied with current SRMs. The workshop produced recommendations for the development of new SRMs that would be suitable for the different soot measurement methods.|
|JRC Directorate:||Sustainable Resources|
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