FINN emission estimates are based on the framework described by Wiedinmyer et al. [2006; 2011; 2023]. FINN uses satellite observations of active fires and land cover, together with emission factors and estimated fuel loadings to provide daily, highly-resolved (1 km) open burning emissions estimates for use in regional and global chemical transport models.
FINNv2.5 uses an updated algorithm for determining fire size by aggregating adjacent fire detections. For emissions from 2012 onward, fire detections from both MODIS and VIIRS satellite instruments are used. Emissions are also provided for the full period since 2002 based on only MODIS fire detections for consistency for use in long time series analyses or model simulations. Fire data were downloaded from the NASA Fire Information for Resource Management System (FIRMS, https://firms.modaps.eosdis.nasa.gov/download/). See Wiedinmyer et al. (2023) for more information.
The emissions of non-methane organic compounds (NMOC) have been speciated either to the MOZART- T1 chemical mechanism (Emmons et al., JAMES, https://doi.org/10.1029/2019MS001882), the SAPRC99 chemical mechanism (Carter et al., 2000), and the GEOS-CHEM mechanism (Bey et al., 2001; http://www.geos-chem.org/). The mapping of the NMOCs to the SAPRC99 and GEOS-CHEM mechanisms has not changed from FINNv1 and is described by Wiedinmyer et al. (2011; See factors in Tables 4 and 5). The MOZART speciation is described in Wiedinmyer et al. (2023).
See also ACOM FINN webpage
References
Wiedinmyer, Christine, Brad Quayle, Chris Geron, Angle Belote, Don McKenzie, Xiaoyang Zhang, Susan O'Neill, and Kristina Klos Wynne, Estimating Emissions from Fires in North America for Air Quality Modeling, Atmospheric Environment, 40, 3419-32, 2006.
Wiedinmyer, C., S. K. Akagi, R. J. Yokelson, L. K. Emmons, J. A. Al-Saadi, J. J. Orlando, and A. J. Soja, The Fire Inventory from NCAR (FINN): A High Resolution Global Model to Estimate the Emissions from Open Burning, Geoscientific Model Development, 4, doi:10.5194/gmd-4-625-2011, 2011.
Wiedinmyer, C., Kimura, Y., McDonald-Buller, E. C., Emmons, L. K., Buchholz, R. R., Tang, W., Seto, K., Joseph, M. B., Barsanti, K. C., Carlton, A. G., and Yokelson, R.: The Fire Inventory from NCAR version 2.5: an updated global fire emissions model for climate and chemistry applications, Geosci. Model Dev., 16, 3873–3891, https://doi.org/10.5194/gmd-16-3873-2023, 2023.