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| Titel |
Monitoring CO2 and CH4 concentrations along an urban-rural transect in London, UK |
| VerfasserIn |
Alex Boon, Gregoire Broquet, Debbie Clifford, Frédéric Chevallier, David Butterfield |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075377
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| Zusammenfassung |
| Cities are important sources of carbon dioxide (CO2) and methane (CH4). Anthropogenic
CO2 is released in the combustion of fossil fuels for heating, electricity and transport. The
major sources of CH4 in city environments are natural gas leakage, landfill sites and transport
emissions. Monitoring of urban greenhouse gas concentrations is crucial for cities aiming to
reduce emissions through measures such as changes to the transport infrastructure and green
planning.
We present measurements of CO2 and CH4 concentrations using Cavity Ring-Down
Spectroscopy (CRDS) at four sites located in and around London, UK. Two sites were
located in the inner city, one in the suburban fringe and the fourth in a rural location close to
the city. This study was funded by Astrium Services Ltd as part of a pilot scheme to
monitor city-scale GHG emissions and presented a unique opportunity to study
changes in greenhouse gas concentrations across an urban to rural ‘transect’. The
CHIMERE chemistry-transport model is used to estimate CO2 and CH4 concentrations
throughout the four month measurement period during the summer of 2012. Comparisons
are made between the measured and modelled CO2 and CH4 concentrations and
the representativity of the study sites for future urban greenhouse gas monitoring
is considered. This study also examines the ability of a variety of measurement
and modelling techniques to partition anthropogenic and biogenic CO2 sources. |
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