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    Global data set of biogenic VOC emissions calculated by the MEGAN model over the last 30 years

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    Authors
    Sindelarova, K.
    Granier, C.
    Bouarar, I.
    Guenther, A.
    Tilmes, S.
    Stavrakou, T.
    Müller, J.-F.
    Kuhn, U.
    Stefani, P.
    Knorr, W.
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    Discipline
    Earth and related Environmental sciences
    Subject
    aerosol composition
    aerosol formation
    concentration (composition)
    isoprene
    methanol
    monoterpene
    parameterization
    seasonal variation
    volatile organic compound
    Africa
    Amazonia
    Australia
    Malaysia
    South America
    Audience
    Scientific
    Date
    2014
    Metadata
    Show full item record
    Description
    The Model of Emissions of Gases and Aerosols from Nature (MEGANv2.1) together with the Modern-Era Retrospective Analysis for Research and Applications (MERRA) meteorological fields were used to create a global emission data set of biogenic volatile organic compounds (BVOC) available on a monthly basis for the time period of 1980-2010. This data set, developed under the Monitoring Atmospheric Composition and Climate project (MACC), is called MEGAN-MACC. The model estimated mean annual total BVOC emission of 760 Tg (C) yrg-1consisting of isoprene (70%), monoterpenes (11%), methanol (6%), acetone (3%), sesquiterpenes (2.5%) and other BVOC species each contributing less than 2%. Several sensitivity model runs were performed to study the impact of different model input and model settings on isoprene estimates and resulted in differences of up to ±17% of the reference isoprene total. A greater impact was observed for a sensitivity run applying parameterization of soil moisture deficit that led to a 50% reduction of isoprene emissions on a global scale, most significantly in specific regions of Africa, South America and Australia. MEGAN-MACC estimates are comparable to results of previous studies. More detailed comparison with other isoprene inventories indicated significant spatial and temporal differences between the data sets especially for Australia, Southeast Asia and South America. MEGAN-MACC estimates of isoprene, α-pinene and group of monoterpenes showed a reasonable agreement with surface flux measurements at sites located in tropical forests in the Amazon and Malaysia. The model was able to capture the seasonal variation of isoprene emissions in the Amazon forest.
    Citation
    Sindelarova, K.; Granier, C.; Bouarar, I.; Guenther, A.; Tilmes, S.; Stavrakou, T.; Müller, J.-F.; Kuhn, U.; Stefani, P.; Knorr, W. (2014). Global data set of biogenic VOC emissions calculated by the MEGAN model over the last 30 years. , Atmospheric Chemistry and Physics, Vol. 14, Issue 17, 9317-9341, DOI: 10.5194/acp-14-9317-2014.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2813
    doi: http://dx.doi.org/10.5194/acp-14-9317-2014
    scopus: 2-s2.0-84900437063
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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