Papers Detailed performance assessment of the CAPS single scattering albedo monitor (CAPS PMssa) as a field-based instrument for measuring light absorption by aerosols by Rob Modini, Nicolas Bukowiecki, Martin Irwin, Prodromos Fetfatzis, Kostas Eleftheriadis, Bas Henzing, Marcel Moerman and Martin Gysel-Beer Characterization of a new miniCAST with diffusion flame and premixed flame options: Generation of particles with high EC content in the size range 30 nm to 200 nm by M. N. Ess, and K. Vasilatou Quantifying and reducing the uncertainties of in situ aerosol absorption measurements with the extinction-minus-scattering technique by Martin Irwin, Joel C. Corbin, Fengshan Liu, Rob Modini and Martin Gysel-Beer Optical and morphological properties of soot particles generated by the miniCAST 5201 BC generatorby Michaela N. Ess, Michele Bertò, Martin Irwin, Robin L. Modini, Martin Gysel-Beer & Konstantina Vasilatou Posters Recent Developments in the UK Black Carbon Network – Long Term Changes in BC/EC ratiosKrzysztof Ciupek, Gary Fuller, Paul Quincey, David Green and David Butterfield. Optical Properties of Black Carbon Aggregates: Parallel Experimental and Numerical StudyBaseerat Romshoo, Thomas Müller, Jorge Saturno, Andreas Nowak and Alfred Wiedensohler Comparison of different soot generators: Towards a standard reference material for aerosol absorptionJorge Saturno, Andreas Nowak, Thomas Müller, Baseerat Romshoo, Joel Corbin, Gregory J. Smallwood, Paul Green, Krzysztof Ciupek, Konstantina Vasilatou, Michaela Ess, François Gaie-Levrel, Kostas Eleftheriadis, Maria Gini, Martin Irwin, Martin Gysel-Beer, Volker Ebert and Paul Quincey A potential reference standard for black carbon absorption measurements: Investigations on the optical properties and morphology of propane-driven soot aerosolby Jorge Saturno, Andreas Nowak, Thomas Müller, Detlef Bergmann, Wolfgang Hässler-Grohne, Dorothee Hüser and Volker Ebert Optical and morphological characterization of “miniCAST 5201 BC”-sootMichaela N. Ess, Michele Bertò, Martin Irwin, Robin Modini, Martin Gysel-Beer and Konstantina Vasilatou Addressing artefacts in in situ absorption measurements of light absorbing aerosolsby Visser, B., N. Karlen, A. Meier, P. Steigmeier, D. Egli, L. Drinovec, G. Močnik, and E. Weingartner. Measurement Artefacts from Evaporation and Recondensation of Volatiles in In-situ Aerosol Light Absorption Techniquesby E. Weingartner, B. Visser, N. Karlen, A. Meier, P. Steigmeier, D. Egli, L. Drinovec and G. Močnik Characterization of a New MiniCAST Generator (5201 Type BC) Including Diffusion and Premixed Flame Options by M. N. Ess and K. Vasilatou. In -situ Aerosol Light Absorption Techniques: Cross -sensitivity to Gases and Artefacts from Evaporation/Recondensation of Volatiles by E. Weingartner, B. Visser, N. Karlen , A. Meier, P. Steigmeier , D. Egli , L. Drinovec and G. Močnik. Presentations 16ENV02 Black Carbon Final Stakeholder teleconferencePaul Quincey, Thomas Müller, Jorge Saturno and Kostas Eleftheriadis Activities to improve calibration for PM mass concentration and black carbon measurements in the EMPIR programme Paul Quincey Reports First Publishable Summary for 16ENV02 Black Carbon Metrology for light absorption by atmospheric aerosols Second Publishable Summary for 16ENV02 Black Carbon Metrology for light absorption by atmospheric aerosols Third Publishable Summary for 16ENV02 Black Carbon Metrology for light absorption by atmospheric aerosols