Global fire emissions estimates during 1997–2016

Global fire emissions estimates during 1997–2016

12 September 2017 | Guido R. van der Werf, James T. Randerson, Louis Giglio, Thijs T. van Leeuwen, Yang Chen, Brendan M. Rogers, Mingquan Mu, Margreet J. E. van Marle, Douglas C. Morton, G. James Collatz, Robert J. Yokelson, and Prasad S. Kasibhatla
The paper presents the fourth version of the Global Fire Emissions Database (GFED4) and quantifies global fire emissions from 1997 to 2016. The GFED4 model, based on the Carnegie-Ames-Stanford Approach (CASA), includes several improvements over previous versions, such as new burned area estimates that account for small fires, a revised fuel consumption parameterization, and better representation of fuel consumption in frequently burning landscapes. The new version has a higher spatial resolution (0.25°) and uses different emission factors to resolve trace gas and aerosol emissions from temperate and boreal forest ecosystems. Global mean carbon emissions using the burned area dataset with small fires (GFED4s) were 2.2 Pg C yr−1 during 1997–2016, with a maximum in 1997 (3.0 Pg C yr−1) and a minimum in 2013 (1.8 Pg C yr−1). These estimates are 11% higher than those from the previous version (GFED3) during 1997–2011 due to an increase in burned area (37%) and a decrease in mean fuel consumption (-19%). The addition of small fires had the largest impact on emissions in temperate North America, Central America, Europe, and temperate Asia. The revised dataset provides a more consistent set of burned area and emissions, contributing to a better understanding of multi-decadal changes in fire dynamics and their impact on the Earth system.The paper presents the fourth version of the Global Fire Emissions Database (GFED4) and quantifies global fire emissions from 1997 to 2016. The GFED4 model, based on the Carnegie-Ames-Stanford Approach (CASA), includes several improvements over previous versions, such as new burned area estimates that account for small fires, a revised fuel consumption parameterization, and better representation of fuel consumption in frequently burning landscapes. The new version has a higher spatial resolution (0.25°) and uses different emission factors to resolve trace gas and aerosol emissions from temperate and boreal forest ecosystems. Global mean carbon emissions using the burned area dataset with small fires (GFED4s) were 2.2 Pg C yr−1 during 1997–2016, with a maximum in 1997 (3.0 Pg C yr−1) and a minimum in 2013 (1.8 Pg C yr−1). These estimates are 11% higher than those from the previous version (GFED3) during 1997–2011 due to an increase in burned area (37%) and a decrease in mean fuel consumption (-19%). The addition of small fires had the largest impact on emissions in temperate North America, Central America, Europe, and temperate Asia. The revised dataset provides a more consistent set of burned area and emissions, contributing to a better understanding of multi-decadal changes in fire dynamics and their impact on the Earth system.
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