Net CO2 surface emissions at Bern, Switzerland inferred from ambient observations of CO2, delta(O-2/N-2), and (222) Rn using a customized radon tracer inversion

van der Laan, S., van der Laan-Luijkx, I. T., Zimmermann, L., Conen, F. and Leuenberger, M. (2014) Net CO2 surface emissions at Bern, Switzerland inferred from ambient observations of CO2, delta(O-2/N-2), and (222) Rn using a customized radon tracer inversion. Journal of Geophysical Research: Atmospheres, 119 (3). pp. 1580-1591. ISSN 2169-897X

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Abstract

The (222)Radon tracer method is a powerful tool to estimate local and regional surface emissions of, e.g., greenhouse gases. In this paper we demonstrate that in practice, the method as it is commonly used, produces inaccurate results in case of nonhomogeneously spread emission sources, and we propose a different approach to account for this. We have applied the new methodology to ambient observations of CO2 and (222)Radon to estimate CO2 surface emissions for the city of Bern, Switzerland. Furthermore, by utilizing combined measurements of CO2 and (O-2/N-2) we obtain valuable information about the spatial and temporal variability of the main emission sources. Mean net CO2 emissions based on 2 years of observations are estimated at (11.22.9) kt km(-2) a(-1). Oxidative ratios indicate a significant influence from the regional biosphere in summer/spring and fossil fuel combustion processes in winter/autumn. Our data indicate that the emissions from fossil fuels are, to a large degree, related to the combustion of natural gas which is used for heating purposes.

Item Type: Article
Uncontrolled Keywords: co2,(222)radon tracer inversion,o-2,n-2,fossil fuel emissions,biospheric respiration,oxidative ratio,carbon-dioxide,netherlands,methane,rn-222,air
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Pure Connector
Date Deposited: 09 Dec 2015 13:00
Last Modified: 16 Sep 2019 08:33
URI: https://ueaeprints.uea.ac.uk/id/eprint/55744
DOI: 10.1002/2013JD020307

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