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| Titel |
Soot reference materials for instrument calibration and intercomparisons: a workshop summary with recommendations |
| VerfasserIn |
D. Baumgardner, O. Popovicheva, J. Allan, V. Bernardoni, J. Cao, F. Cavalli, J. Cozic, E. Diapouli, K. Eleftheriadis, P. J. Genberg, C. Gonzalez, M. Gysel, A. John, T. W. Kirchstetter, T. A. J. Kuhlbusch, M. Laborde, D. Lack, T. Müller, R. Niessner, A. Petzold, A. Piazzalunga, J. P. Putaud, J. Schwarz, P. Sheridan, R. Subramanian, E. Swietlicki, G. Valli, R. Vecchi, M. Viana |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 8 ; Nr. 5, no. 8 (2012-08-02), S.1869-1887 |
| Datensatznummer |
250003044
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| Publikation (Nr.) |
 copernicus.org/amt-5-1869-2012.pdf |
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| Zusammenfassung |
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 the properties of
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 soot 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 users
of the single-particle soot-photometer (SP2), an instrument using
laser-induced incandescence, 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, and subsequent, interactive
discussions, produced a number of recommendations for the development of new
SRMs, and their implementation, that would be suitable for the
different soot measurement methods. |
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