Environ. Sci. Technol. 2008, 42, 5087–5093
Seasonal and Diurnal Variation of PM2.5 Apparent Particle Density in Urban Air in Augsburg, Germany M I K E P I T Z , * ,†,‡ O T M A R S C H M I D , § JOACHIM HEINRICH,† ¨ RGEN MAGUHN,⊥ WOLFRAM BIRMILI,| JU RALF ZIMMERMANN,⊥ H.-ERICH WICHMANN,† A N N E T T E P E T E R S , † A N D J O S E F C Y R Y S †,‡ Helmholtz Zentrum Mu ¨ nchen, German Research Center for Environmental Health, Institute of Epidemiology, 85764 Neuherberg, Germany, University of Augsburg, Center for Science and Environment, 86159 Augsburg, Germany, Helmholtz Zentrum Mu ¨ nchen, German Research Center for Environmental Health, Institute of Inhalation Biology, 85764 Neuherberg, Germany, Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany, Helmholtz Zentrum Mu ¨ nchen, German Research Center for Environmental Health, Institute of Ecological Chemistry, 85764 Neuherberg, Germany
Received November 15, 2007. Revised manuscript received March 7, 2008. Accepted April 15, 2008.
The apparent particle density of particulate matter with aerodynamic diameter
