GLOBEMISSION AEROSOL PRODUCTS

* Introduction

This document discusses the aerosol emission data made available within the GlobEmission
project at http://www.globemission.eu/data.php. A separate dataset is
available for wildfire emissions at http://silam.fmi.fi/globemission/fires/datapage.php.

The emission estimates have been obtained using MODIS satellite aersol observations and
inverse modeling. The model computations employ a traditional emission inventory as the first
guess (a priori emissions), and the inversion results in a refinement optimizing the
agreement between the simulated and observed aerosol loadings. The inversion is based on a
4D-Var scheme presented by Vira & Sofiev (2012).

For the European domain, the a priori emission inventory is given by the TNO-MACC
inventory (Kuenen et al., 2011). For all other domains, the a priori emission are given by
the MACCcity inventory (Lamarque et al., 2010).

* The file format and contents

The data are given in NetCDF3 format for year 2008. Due to the different aerosol
speciation in the a priori emission inventories, the European emissions are given for
PM2.5 and PM10, while for the other domains, emissions are given for black and organic
carbon (BC/OC) separately, but for PM1.

For all domains, the emissions are given in monthly averages, on a regular lon-lat grid
with 0.5 degree horizonal resolution.

* Notes on the emission fields

The dataset is intended for research use. Although the inversion aims to quantify the
anthropogenic emission sources, the available information is not sufficient to reliably
distinguish between various emission sources, including biomass burning, and natural
primary and secondary aerosols. Similar rescrictions apply to the estimates on the
chemical speciation of the emissions. 

* Contacts

Julius Vira, Finnish Meteorological Institute
first_name dot lastname at fmi dot fi

* References

Kuenen, J., Gon, H. van der, Visschedijk, A., 2011. MACC European emission inventory for
the years 2003-2007.

Lamarque, J.-F., Bond, T.C., Eyring, V., Granier, C., Heil, a., Klimont, Z., Lee, D.,
Liousse, C., Mieville, a., Owen, B., Schultz, M.G., Shindell, D., Smith, S.J., Stehfest,
E., Van Aardenne, J., Cooper, O.R., Kainuma, M., Mahowald, N., McConnell, J.R., Naik, V.,
Riahi, K., van Vuuren, D.P., 2010. Historical (1850-2000) gridded anthropogenic and
biomass burning emissions of reactive gases and aerosols: methodology and
application. Atmos. Chem. Phys. 10, 7017-7039.

Vira, J., Sofiev, M., 2012. On variational data assimilation for estimating the model
initial conditions and emission fluxes for short-term forecasting of SOx
concentrations. Atmos. Environ. 46, 318-328.