Is believed to be the fate of almost half of the carbon released in the form With their losses comparable to the magnitude of net biome productivity Which are regarded as highly significant for net ecosystem productivity, Moreover, isoprene emissions could play an important role in theĬarbon balance because it has the largest contribution to total BVOCs, Interact with solar radiation and act as effective cloud condensation Organic aerosols (Claeys et al., 2004), which For example, once in the atmosphere, isoprene has implications forĬhemical and physical processes due to its reactivity, influences on theĪtmospheric oxidative capacity, and its potential to form secondary
This compound regulates large-scale biogeochemicalĬycles. Largest input to total global BVOC emissions, with a magnitude of Organic compound (BVOC) emissions from many landscapes and represents the Isoprene is considered the dominant contribution to biogenic volatile Mechanisms that underlie seasonal variation in isoprene emissions in Highlights the importance of accounting for differences in isoprene emissionĬapacity across canopy leaf age classes and identifying forest adaptive Variations in isoprene fluxes ( R 2=0.52, p<0.05). Leaf age demography, significantly improved simulations in terms of seasonal The model results show that the observations ofĪge-dependent isoprene emission capacity, in conjunction with camera-derived (MEGAN 2.1), we improved the leaf age algorithm by utilizing results from theĬamera-derived leaf phenology that provided LAI categorized into threeĭifferent leaf ages. Leaf phenology in the Model of Emissions of Gases and Aerosols from Nature Leaf area index (LAI) of recently mature leaf age class (e.g., leaf ages ofģ–5 months) exhibits the highest correlation with observed isoprene flux Our results also indicate that light and temperature cannot totally explain isoprene flux seasonality. Seasons, whereas the lowest emissions were found during the wet-to-dry Isoprene emissions are observed during the dry and dry-to-wet transition In this paper, we aim to connect intensive,įield-based measurements of canopy isoprene flux over a central AmazonianĮvergreen forest site with meteorological observations and with tower-mounted camera leaf phenology to improve our understanding of patterns and causes However, our understanding of the seasonal patterns of isopreneįluxes and the associated mechanistic controls is still limited, especially inĪmazonian evergreen forests. Solar radiation and temperature) and biological factors (e.g., leaf Isoprene fluxes vary seasonally with changes in environmental factors (e.g.,
Presidente Dutra, km 40, CachoeiraĬorrespondence: Eliane G. Alves Hide author detailsĬorrespondence: Eliane G. Alves Received: – Discussion started: – Revised: – Accepted: – Published:
4 Department of Earth System Science, University of California, Irvine,.3 2B Technologies, Inc., 2100 Central Ave., Boulder, CO 80301, USA.Para (UFOPA), Rua Vera Paz s/n, CEP 68035-110, Santarem-PA, Brazil 2 Institute of Engineering and Geoscience, Federal University of West.1 Department of Environmental Dynamics, National Institute forĪmazonian Research (INPA), Av.
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