Estimates of black carbon emissions from global biomass burning for the period 1997–2023

Estimating black carbon (BC) emissions from biomass burning is
crucial for accurately assessing the climate impact of this pollutant. In
this study, We have estimated BC emissions from biomass burning in
different geographic regions worldwide at a resolution of 0.25°×0.25° from
1997 to 2023. These findings are crucial for accurately modeling the
impact of BC on global climatic forcing. Over the past 27 years, the
emissions of BC from global biomass burning activities have remained
stable. The high BC emissions between 2003 and 2008 were associated with
increased precipitation. The SHSA and SHAF regions have emerged as the
primary contributors, accounting for approximately 40% of total BC
emissions originating from global biomass burning sources and
high BC emissions in the southern hemisphere's spring. This study
also reveals that BC emissions in the SHAF region during
1997–2023 exhibit a Granger causal relationship with Antarctic sea ice
loss at a two-year lag, but the impact intensity demonstrates significant
temporal heterogeneity. This study enhances our understanding of
temporal and spatial variations in global BC release caused by biomass
burning while providing fundamental data for international departments
responsible for managing such activities.