title: Diurnal variability of delta13C and delta18O of atmospheric CO2 in the urban atmosphere of Kraków, Poland.
abstract: This article presents the results of measurements of the isotopic composition and concentration of atmospheric carbon dioxide, performed on air samples from Kraków (Southern Poland) in different seasons of the year. A simple isotope mass balance model has been applied to determine the contributions of different sources of CO2 to the urban atmosphere of Kraków city: the latitudinal/regional background, biospheric contributions and anthropogenic emissions. The calculations show that during the summer and early autumn the dominant contribution to local CO2 peaks is the biosphere, making up to 20% of atmospheric CO2 during the nocturnal temperature inversion in the lower troposphere. During early spring and winter, anthropogenic emissions are the main local source.
authors.affiliation: Department of Environmental Physics, Faculty of Physics and Nuclear Techniques AGH - University of Science and Technology Al. Mickiewicza 30 30-059 Kraków Poland. zimnoch@ftj.agh.edu.pl
authors.forename: Miroslaw
authors.initials: M
authors.lastname: Zimnoch
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Florkowski
authors.forename: Jaroslaw
authors.initials: J
authors.lastname: Necki
authors.forename: Rolf
authors.initials: R
authors.lastname: Neubert
mesh_terms: D001272:Atmosphere; D002245:Carbon Dioxide / Q000032:analysis*; D002247:Carbon Isotopes / Q000032:analysis; D004784:Environmental Monitoring; D010103:Oxygen Isotopes / Q000032:analysis; D010507:Periodicity; D011044:Poland; D012621:Seasons
chemical_list: D002247:Carbon Isotopes; D010103:Oxygen Isotopes; D002245:Carbon Dioxide