Variability of isoprene emissions in Central Amazon: simulations using the Megan model
DOI:
https://doi.org/10.5902/2179460X75410Keywords:
Tropical forests, Biogenic volatile organic compounds, Emission driversAbstract
We investigated the seasonal and intra-annual variability of isoprene emissions in central Amazon using the Model of Emissions of Gases and Aerosols from Nature (MEGAN 2.1). For that, we used observational data of air temperature, solar radiation and leaf area index fractionated into age classes (new, growing, mature and senescing). Additionally, we evaluated the effect of air temperature and solar radiation on isoprene emissions. Our results showed that the highest isoprene fluxes were observed during the dry season and dry-wet transition, consistent with the variability of radiation and air temperature at the experimental site. However, such environmental factors cannot explain the variation of isoprene flux fully, suggesting that other agents (i.e. biological) may also be associated with the seasonal changes in isoprene emissions in central Amazon.
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