The Quantifying the Amazon Isoprene Budget: Reconciling Top-down versus Bottom-up Emission Estimates project produced a unique high resolution model (GEOS-Chem version v8-03-01 - with modifications) for the Amazon, which simulated isoprene emissions and atmospheric chemistry.

Formaldehyde (HCHO) vertical column measurements from the Scanning

Imaging Absorption spectrometer for Atmospheric Cartography (SCIAMACHY) and

Ozone Monitoring Instrument (OMI), and a nested-grid version of the GEOS-Chem

chemistry transport model, are used to infer an ensemble of top-down isoprene emission estimates

from tropical South America during 2006, using different model configurations and

assumptions in the HCHO air-mass factor (AMF) calculation. Scenes affected by biomass

burning are removed on a daily basis using fire count observations, and the local

model sensitivity was used to identify locations where the impact of spatial smearing is small,

though this comprises spatial coverage over the region

Results of this project are presented in the following publication:

Barkley, M. P., et al. (2013), Top-down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns, J. Geophys. Res. Atmos., 118, 6849–6868, doi:10.1002/jgrd.5055

and model outputs associated to this project are archived at CEDA.

This was a NERC funded project.