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Net CO2 surface emissions at Bern, Switzerland inferred from ambient observations of CO2, δ(O2/N2), and 222Rn using a customized radon tracer inversion
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 2372426
Author(s) van der Laan, S; van der Laan-Luijkx, IT; Zimmermann, L; Conen, F; Leuenberger, M
Author(s) at UniBasel Conen, Franz
Zimmermann, Lukas
Year 2014
Title Net CO2 surface emissions at Bern, Switzerland inferred from ambient observations of CO2, δ(O2/N2), and 222Rn using a customized radon tracer inversion
Journal Journal of geophysical research
Volume 119
Number 3
Pages / Article-Number 1580-1591
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.

Publisher American Geophysical Union
ISSN/ISBN 0022-1406
edoc-URL http://edoc.unibas.ch/dok/A6223608
Full Text on edoc No
Digital Object Identifier DOI 10.1002/2013JD020307
ISI-Number WOS:000332994600032
Document type (ISI) Article
 
   

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13/04/2024