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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Short summary
Isoprene emissions from vegetation have a large effect on atmospheric chemistry and air quality. Here we use the adjoint of GEOS-Chem in an inversion of OMI formaldehyde observations to produce top-down estimates of isoprene emissions in the southeast US during the summer of 2013. We find that MEGAN v2.1 is biased high on average by 40 %. Our downward correction of isoprene emissions leads to a small reduction in modeled surface O3 and decreases the contribution of isoprene to organic aerosol.
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ACP | Articles | Volume 18, issue 8
Atmos. Chem. Phys., 18, 5483–5497, 2018
https://doi.org/10.5194/acp-18-5483-2018
Atmos. Chem. Phys., 18, 5483–5497, 2018
https://doi.org/10.5194/acp-18-5483-2018

Research article 23 Apr 2018

Research article | 23 Apr 2018

High-resolution inversion of OMI formaldehyde columns to quantify isoprene emission on ecosystem-relevant scales: application to the southeast US

Jennifer Kaiser et al.

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Cited articles

Abbot, D., Palmer, P., Martin, R., Chance, K., Jacob, D., and Guenther, A.: Seasonal and interannual variability of isoprene emissions as determined by formaldehyde column measurements from space, Geophys. Res. Lett., 17, 1886, https://doi.org/10.1029/2003GL017336, 2003. 
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Barkley, M. P., Smedt, I. D., Van?Roozendael, M., Kurosu, T. P., Chance, K., Arneth, A., Hagberg, D., Guenther, A., Paulot, F., Marais, E., and Mao, J.: Top-down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns, J. Geophys. Res.-Atmos., 118, 6849–6868, https://doi.org/10.1002/jgrd.50552, 2013. 
Bash, J. O., Baker, K. R., and Beaver, M. R.: Evaluation of improved land use and canopy representation in BEIS v3.61 with biogenic VOC measurements in California, Geosci. Model Dev., 9, 2191–2207, https://doi.org/10.5194/gmd-9-2191-2016, 2016. 
Bauwens, M., Stavrakou, T., Müller, J.-F., De Smedt, I., Van Roozendael, M., van der Werf, G. R., Wiedinmyer, C., Kaiser, J. W., Sindelarova, K., and Guenther, A.: Nine years of global hydrocarbon emissions based on source inversion of OMI formaldehyde observations, Atmos. Chem. Phys., 16, 10133–10158, https://doi.org/10.5194/acp-16-10133-2016, 2016.