265478e3-052c-4b42-93df-71fe63207851 eng Ev-K2-CNR +39 035 3230511 +39 035 3230551 Via San Bernardino 145 Bergamo BG 24126 Italy metadata@evk2cnr.org http://www.evk2cnr.org/ 2012-03-09T18:17:47 ISO 19115:2003/19139 1.0 Angular Illumination and Truncation of Three Different Integrating Nephelometers: Implications for Empirical, Size-Based Corrections 2009-06-01T00:00:00 Aerosol Science and Technology Volume 43 6 581-586 Aerosol Science and Technology, 43(6),pages 581-586, 2009 Aerosol Science and Technology Volume 43, Issue 6, 2009 0278-6826 Integrating nephelometers are widely used for monitoring and research applications related to air pollution and climate. Several commercial versions of the instrument are available and are in wide use in the community. This article reports on results from a calibration and intercomparison workshop where several units of the three most widely used nephelometer models were tested with respect to their CO2 calibration accuracy and stability and non-idealities of their angular illumination function. Correction factors that result from the non-ideal illumination due to truncation of the sensing volumes in the near-forward and near-backward angular ranges and for non-Lambertian illumination from the light sources are presented, in particular for two models that have not previously been tested in this respect. The correction factors ranged from 0.95 to 1.15 depending on the model of nephelometer and aerosol size distribution. Recommendations for operational data analysis in context of these and previous performance tests are presented. Taylor & Francis Group +1 8006347064 +44 2070176000 subscriptions@tandf.co.uk. http://www.tandfonline.com Thomas Muller Leibniz Institute for Tropospheric Reseach, Permoserstrasse 15 Leipzig 04318 Germany muellert@tropos.de www.tropos.de/ WWW:LINK-1.0-http--partners Andreas Novak Leibniz Institute for Tropospheric Reseach, Permoserstrasse 15 Leipzig 04318 Germany Nowak@tropos.de www.tropos.de/ WWW:LINK-1.0-http--partners Alfred Wiedensohler Leibniz Institute for Tropospheric Reseach, +49 3412352467 +49 1735641482 +49 3412352361 Permoserstrasse 15 Leipzig 04318 Germany alfred.wiedensohler@tropos.de http://www.tropos.de/info/wiedensohler_a.pdf WWW:LINK-1.0-http--related Patrick Sheridan NOAA/Earth System Research Laboratory, +1 3034976672 NOAA/ESRL R/GMD1 325 Broadway Boulder Colorado CO 80305-3337 United States of America Patrick.Sheridan@noaa.gov http://www.esrl.noaa.gov/gmd/about/stafflist_group.html WWW:LINK-1.0-http--related M. Laborde Ecotech Pty Ltd, 1492 Ferntree Gully Road Knoxfield VIC 3180 Australia http://www.ecotech.com.au/ David S. Covert Department of Atmospheric Science, University of Washington, +1 2066857461 154 ACC Bldg. Seattle Washington United States of America dcovert@atmos.washington.edu http://www.atmos.washington.edu/people/emeritus.shtml WWW:LINK-1.0-http--related Angela Marinoni Institute of Atmospheric Sciences and Climate (ISAC) - CNR +39 0516399597 +39 0516399652 Via Gobetti,101 Bologna BO 40129 Italy a.marinoni@isac.cnr.it www.isac.cnr.it Kornelia Imre Department of Earth and Environmental Sciences, University of Pannonia Egyetem str. 10. Veszprém H-8201 Hungary kornelia@almos.uni-pannon.hu imre.kornelia@almos.uni-pannon.hu http://kt.mk.uni-pannon.hu/ Bas Henzing TNO—Netherlands Organization for Applied Scienti?c Research, Department of Industrial and External Safety Laan van Westenenk 501 Apeldoorn 7334 DT Netherlands bas.henzing@tno.nl http://www.tno.nl/ WWW:LINK-1.0-http--partners Jean-Claude Roger CNRS—Université Blaise Pascal, +33 675157675 +33 473405136 Aubière Cedex 63177 France roger@opgc.univ-bpclermont.fr wwwobs.univ-bpclermont.fr Sebastiao Martins dos Santos European Commission, Joint Research Centre, Institute for Environment and Sustainability, Via E. Fermi 2749 Ispra VA Italy 21027 http://ies.jrc.ec.europa.eu/contact.html Reinhard Wilhelm DWD, Meteorological Observatory, +49 8805954144 Hohenpeissenberg Germany http://www.dwd.de/ WWW:LINK-1.0-http--partners Ya-Qiang Wang Centre for Atmosphere Watch and Services, Chinese Academy of Meteorological Sciences, +86 1058995237 +86 1062176414 46, Zhong-Guan-Cun South Avenue Beijing 100081 China, Mainland yaqiang.wang@gmail.com http://2011.cma.gov.cn/en/ WWW:LINK-1.0-http--partners Gerrit de Leeuw Finnish Meteorological Institute, +358 509195458 +358 0919293146 Erik Palménin aukio Helsinki FI-00560 Finland Gerrit.Leeuw@fmi.fi http://ilmatieteenlaitos.fi/ WWW:LINK-1.0-http--partners https://geoportal.mountaingenius.org/geonetwork/srv/eng/resources.get?uuid=265478e3-052c-4b42-93df-71fe63207851&fname=mountain_witness__s.png thumbnail png SHARE Integrating nephelometers light scattering coefficients particulate scattering coefficient Non-Ideal Illumination air pollution Climate aerosol eng climatologyMeteorologyAtmosphere environment -11.5 43.2 35.3 81.4 http://www.tandfonline.com/doi/abs/10.1080/02786820902798484 WWW:LINK-1.0-http--link Abstract:"Angular Illumination and Truncation of Three Different Integrating Nephelometers: Implications for Empirical, Size-Based Corrections." http://www.tandfonline.com/doi/full/10.1080/02786820902798484 Full text(html):"Angular Illumination and Truncation of Three Different Integrating Nephelometers: Implications for Empirical, Size-Based Corrections." https://geoportal.mountaingenius.org/webapp/srv/en/resources.get?id=37823&fname=AST.pdf&access=private WWW:DOWNLOAD-1.0-http--download AST.pdf Full Text(pdf):"Angular Illumination and Truncation of Three Different Integrating Nephelometers: Implications for Empirical, Size-Based Corrections." "Angular Illumination and Truncation of Three Different Integrating Nephelometers: Implications for Empirical, Size-Based Corrections". Aerosol Science and Technology Volume 43, Issue 6, pages 581-586,2009. Muller, T., Novak, A., Wiedensohler, A., Sheridan, P., Laborde, M., David Covert, S., Marinoni, A., Imre, K., Henzing, B., Roger, J.C., Martins dos Santos, S., Wilhelm, R., Wang, Y.Q., de Leeuw, G.