Skład izotopowy dwutlenku węgla w atmosferze Krakowa (Isotopic composition of carbon dioxide in the atmosphere of Kraków)
Journal Title: Acta Geographica Lodziensia - Year 2016, Vol 104, Issue
Abstract
Stable isotopes constitute a powerful tool to study the sources of greenhouse gases, especially CO2. Carbon dioxide derived from the burning of fossil fuels has a distinct 13C isotopic composition depending on the type of fuel. Therefore, one can attribute contributions of different emission sources to the total CO2 load in the urban atmosphere. Quasi-continuous measurements of the mixing ratio of atmospheric CO2 and its 13C signature were performed in Krakow in 2013 to analyze its seasonal and synoptic variability. High CO2 mixing ratios were observed in winter due to intensified burning of fossil fuels for heating purposes (mostly methane). During the summer of 2013, a slight increase in atmospheric CO2 was observed fol-lowing a drought event and a subsequent suppression of the photosynthetic activity of the local biosphere. A high temporal resolution of the measurements allowed to analyze short-term increases of the measured CO2 mixing ratios. Two such events are presented and discussed. Isotopic mass balance combined with air backward trajectory analysis allowed to attribute local traffic and industry as potential sources of these events.
Authors and Affiliations
Alina Jasek, Mirosaw Zimnoch, Kazimierz Różański
Keywords
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