Measurement report: Assessing the impacts of emission uncertainty on aerosol optical properties and radiative forcing from biomass burning in peninsular Southeast Asia

• DOI: 10.5194/acp-24-367-2024
• Publication Date: 2024-01-11T11:19:27Z
• Authors: Yinbao Jin; Yiming Liu; Xiao Lu; Xiaoyang Chen; Ao Shen; Haofan Wang; Yinping Cui; Yifei Xu; Siting Li; Jian Liu; Ming Zhang; Yingying Ma; Qi Fan
• Keywords: Emission inventory; Forcing (mathematics); Extinction (optical mineralogy)

Abstract. Despite significant advancements in improving the dataset for biomass burning (BB) emissions over past few decades, uncertainties persist BB aerosol emissions, impeding accurate assessment of simulated optical properties (AOPs) and direct radiative forcing (DRF) during wildfire events global regional models. This study assessed AOPs (including depth (AOD), absorption (AAOD), extinction coefficients (AECs)) DRF using eight independent emission inventories applied to Weather Research Forecasting model coupled with Chemistry (WRF-Chem) period (March 2019) peninsular Southeast Asia (PSEA), where were Global Fire Emissions Database version 4.1s (GFED), INventory from NCAR 1.5 (FINN1.5), Inventory 2.5 MOS (MODIS fire detections; FINN2.5 MOS), MOSVIS + VIIRS MOSVIS), Assimilation System 1.2s (GFAS), Energetics 1.0 (FEER), Quick Dataset release 1 (QFED), Integrated Monitoring Modelling Wildland FIRES project 2.0 (IS4FIRES), respectively. The results show that PSEA region, organic carbon (OC) differ by a factor about 9 (0.295–2.533 Tg M−1), 1.09 ± 0.83 M−1 coefficient variation (CV) 76 %. High-concentration OC occurred primarily savanna agricultural fires. GFED GFAS are significantly lower than other inventories. approximately twice as high those FINN1.5. Sensitivity analysis AOD WRF-Chem different datasets indicated FINN scenarios (v1.5 2.5) overestimate compared observation (VIIRS), while underestimate high-AOD (HAOD; > 1) regions range 15–22.5∘ N, 97–110∘ E. Among schemes, IS4FIRES FINN1.5 performed better terms simulation consistency bias HAOD region when AERONET sites. AAOD was assessed, satellite observations (TROPOMI) data, it found schemes did not perform well AOD. overestimation 2.5), FEER, largest MOSVIS. representing at sites within region. always best correlation observations. AECs all trends consistent CALIPSO vertical direction (0.5 4 km), demonstrating efficacy smoke plume rise used simulate heights. However, overestimated AECs, underestimated it. In aerosols exhibited daytime shortwave −32.60 24.50 W m−2 surface, positive (1.70 1.40 m−2) atmosphere, negative (−30.89 23.6 top atmosphere. Based on analysis, recommended accurately assessing impact air quality climate