According to the Paris Agreement, 195 countries worldwide set a target for an 80 % reduction below 1990 levels of global greenhouse gas (GHG) emissions by 2050. For this goal, plans and policies for renewable energy deployment have to be urgently activated. Urban policies can play a major role in both climate change mitigation and adaptation, since 70 % of energy related GHG emissions can be attributed to urban and suburban activities, where housing and transport sectors account for more than 50 % of direct household emissions of urban citizens. The Municipality of Florence (Tuscany, central Italy) recently adopted a series of initiatives aimed to lowering GHG emissions (e.g. partial pedestrianization of the city center, expansion of the bycicle lanes and construction of a tramway network). With a population of more than 350,000 inhabitants and more than 10 million of tourists per year, Florence urban area is responsible for more than 1.2 × 106 Mg CO2 annually emitted into the atmosphere, mainly due to vehicular traffic and domestic heating. These anthropogenic sources partially contribute also to urban CH4 emissions, although most of the CH4 flux from the city was attributed to the distribution of fossil fuels. In this study, CO2 fluxes, CO2 and CH4 concentrations and δ13C-CO2 and δ13C-CH4 values, monitored during summer and fall from the roof of a building sited in the city center, are presented. The aim was to investigate the temporal patterns of these GHGs to identify, on a geochemical (isotopic) basis, the local emitting sources and the seasonal variations in their relative contributions.
Sources and sinks of greenhouse gases in Florence (Italy) as determined by carbon isotopic ratios / Tassi F., Venturi S., Cabassi J., Gioli B., Baronti S., Vaselli O., Caponi C., Vagnoli C., Picchi G., Zaldei A., Magi F., Miglietta F., Capecchiacci F.,. - ELETTRONICO. - (2019), pp. 0-0. (Intervento presentato al convegno International Conference on Gas Geochemistry 2019 – ICGG15).
Sources and sinks of greenhouse gases in Florence (Italy) as determined by carbon isotopic ratios
Tassi F.;Venturi S.;Cabassi J.;Baronti S.;Vaselli O.;Caponi C.;Magi F.;Capecchiacci F.
2019
Abstract
According to the Paris Agreement, 195 countries worldwide set a target for an 80 % reduction below 1990 levels of global greenhouse gas (GHG) emissions by 2050. For this goal, plans and policies for renewable energy deployment have to be urgently activated. Urban policies can play a major role in both climate change mitigation and adaptation, since 70 % of energy related GHG emissions can be attributed to urban and suburban activities, where housing and transport sectors account for more than 50 % of direct household emissions of urban citizens. The Municipality of Florence (Tuscany, central Italy) recently adopted a series of initiatives aimed to lowering GHG emissions (e.g. partial pedestrianization of the city center, expansion of the bycicle lanes and construction of a tramway network). With a population of more than 350,000 inhabitants and more than 10 million of tourists per year, Florence urban area is responsible for more than 1.2 × 106 Mg CO2 annually emitted into the atmosphere, mainly due to vehicular traffic and domestic heating. These anthropogenic sources partially contribute also to urban CH4 emissions, although most of the CH4 flux from the city was attributed to the distribution of fossil fuels. In this study, CO2 fluxes, CO2 and CH4 concentrations and δ13C-CO2 and δ13C-CH4 values, monitored during summer and fall from the roof of a building sited in the city center, are presented. The aim was to investigate the temporal patterns of these GHGs to identify, on a geochemical (isotopic) basis, the local emitting sources and the seasonal variations in their relative contributions.
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