Abstract
Biogenic emissions affect the urban air quality as they are ozone and secondary organic aerosol (SOA) precursors and should be taken into account when applying photochemical pollution models. The present study presents an estimation of the magnitude of non-methane volatile organic compounds (BNMVOCs) emitted by vegetation over Greece. The methodology is based on computation developed with the aid of a Geographic Information System (GIS) and theoretical equations in order to produce an emission inventory on a 6 × 6 km2 spatial resolution, in a temporal resolution of 1 h covering one year (2016). For this purpose, a variety of input data was used: updated satellite land-use data, land-use specific emission potentials, foliar biomass densities, temperature, and solar radiation data. Hourly, daily, and annual isoprene, monoterpenes, and other volatile organic compounds (OVOCs) were estimated. In the area under study, the annual biogenic emissions were estimated up to 472 kt, consisting of 46.6% isoprene, 28% monoterpenes, and 25.4% OVOCs. Results delineate an annual cycle with increasing values from March to April, while maximum emissions were observed from May to September, followed by a decrease from October to January.
Highlights
Volatile organic compounds (VOCs) are emitted into the atmosphere from anthropogenic and natural sources in the marine and terrestrial environment
A part part of of this this study study is is the the comparison comparison between between the the annual annual biogenic biogenic emissions emissions with with the the Greece, several studies have been done in order to estimate the anthropogenic ones
The biogenic emissions in Greece were estimated with the aid of a Geographic
Summary
Volatile organic compounds (VOCs) are emitted into the atmosphere from anthropogenic and natural sources in the marine and terrestrial environment. High ozone concentrations are often very pronounced due to primary pollutant emissions in a regional scale dominated by high radiation fluxes and temperature values [5] The calculation of their fluxes is an important input in air quality models, since they are highly reactive in the troposphere by affecting regional photochemical processes [6]. Earlier efforts by [9] and [2] included the Balkans and Greece on a 10 km resolution or Europe on a 30 km resolution, respectively They were either in the form of an emissions model or a Geographic Information System (GIS) database, respectively, and were based on the equations introduced [10] for the computation of isoprene, monoterpene, and OVOCs emission fluxes and used as input land use, foliar biomass densities, emission potentials, temperature, and solar radiation.
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