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formerly Central European Journal of Geosciences

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Influence of the spatial resolution of satellite-derived vegetation parameters on the biogenic Volatile Organic Compounds (VOC) emission modeling

Carlos Silveira / Oxana Tchepel
  • Faculty of Sciences and Technology, University of Coimbra, Rua Luis Reis Santos, Polo II, 3070-788, Coimbra, Portugal
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Published Online: 2014-05-29 | DOI: https://doi.org/10.2478/s13533-012-0166-z


Vegetation is a natural source of Volatile Organic Compounds (VOC) that plays an important role in atmospheric chemistry. The main objective of the current study is to implement a model to quantify process-based VOC emissions from plants that focuses on the relationship between the sensitivity of VOC emission estimates to spatial resolution data, based on scientific knowledge and vegetation dynamics derived from satellite observations. The Normalized Difference Vegetation Index (NDVI) and Leaf Area Index (LAI) were elected to examine this issue using different resolutions of satellite-derived products: 22m from the DEIMOS-1 satellite, and 250m and 1000m provided by MODIS. The study is focused on an area of 80×80km2 in Portugal for 2011. Detailed land cover and meteorological data are also included in the emission quantification algorithm. The primary outcomes were determined using a multi-scale analysis showing spatial and temporal variations in the vegetation parameters and modeling results. The results confirm that the emissions model is highly sensitive to the spatial resolution of the satellite-derived data, resulting in about a 30% difference in total isoprene emissions for the study area.

Keywords: NDVI; LAI; Biogenic emissions; Volatile Organic Compounds; Spatial resolution

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About the article

Published Online: 2014-05-29

Published in Print: 2014-03-01

Citation Information: Open Geosciences, Volume 6, Issue 1, Pages 104–111, ISSN (Online) 2391-5447, DOI: https://doi.org/10.2478/s13533-012-0166-z.

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