Underestimated contribution of open biomass burning to terpenoid emissions revealed by a novel hourly dynamic inventory

Jiangyong Li; Caibao Huang; Chunlin Zhang; Hao Wang; Lin Song; Boguang Wang

doi:10.1016/j.scitotenv.2024.172764

Underestimated contribution of open biomass burning to terpenoid emissions revealed by a novel hourly dynamic inventory

Sci Total Environ. 2024 Apr 24:931:172764. doi: 10.1016/j.scitotenv.2024.172764. Online ahead of print.

Authors

Jiangyong Li¹, Caibao Huang¹, Chunlin Zhang², Hao Wang³, Lin Song⁴, Boguang Wang⁵

Affiliations

¹ Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; College of Environment and Climate, Jinan University, Guangzhou 511443, China.
² Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong Provincial Observation and Research Station for Atmospheric Environment and Carbon Neutrality in Nanling Forests, Guangzhou 511443, China; Guangdong International Science and Technology Cooperation Base of Air Quality Science and Management, Jinan University, Guangzhou 511443, China; College of Environment and Climate, Jinan University, Guangzhou 511443, China. Electronic address: tzhangcl5@jnu.edu.cn.
³ Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong Provincial Observation and Research Station for Atmospheric Environment and Carbon Neutrality in Nanling Forests, Guangzhou 511443, China; Guangdong International Science and Technology Cooperation Base of Air Quality Science and Management, Jinan University, Guangzhou 511443, China; College of Environment and Climate, Jinan University, Guangzhou 511443, China.
⁴ College of Environment and Climate, Jinan University, Guangzhou 511443, China.
⁵ Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong Provincial Observation and Research Station for Atmospheric Environment and Carbon Neutrality in Nanling Forests, Guangzhou 511443, China; Guangdong International Science and Technology Cooperation Base of Air Quality Science and Management, Jinan University, Guangzhou 511443, China; College of Environment and Climate, Jinan University, Guangzhou 511443, China. Electronic address: tbongue@jnu.edu.cn.

PMID: 38670379
DOI: 10.1016/j.scitotenv.2024.172764

Abstract

Terpenoids play a crucial role in atmospheric chemistry, contributing significantly to the formation of ozone and secondary organic aerosol. However, the accurate quantification of terpenoid emissions from biomass burning is currently lacking, leading to underestimated air quality impacts. This study developed a near real-time hourly open biomass burning (OBB) emission inventory named OBEIC, which incorporated geostationary and polar-orbiting satellite fire radiative power. The OBEIC inventory provided emission estimates of 69 terpenoids, categorized into four groups, at an hourly resolution. Monoterpenes were the dominant contributors to the total emissions, accounting for 58 % of the total terpenoid emissions from OBB. Notably, only 24 % of the total monoterpenes emitted from OBB were accounted for by α-pinene and β-pinene, indicating the importance of quantifying emissions of other monoterpene species such as limonene and camphene. Additionally, oxygenated terpenoids, which were previously overlooked, contribute to 20 % of total terpenoid emissions from OBB. Diurnally, the emissions of terpenoids were primarily concentrated during the daytime (61 %); however, this study revealed the significance of nighttime emissions (39 %) as well. When compared to the biogenic and anthropogenic emissions, OBB made substantial contributions to nighttime isoprene (99.8 %), monoterpene (66.8 %), and sesquiterpene (61.7 %) emissions where OBB occurs (in 3 km range), suggesting its significant role in nighttime secondary pollutant formation. The methodology developed in this study has the potential to reduce uncertainties in OBB emissions estimation.

Keywords: Hourly estimation; Near-real-time; Open biomass burning; Terpenoids; VOCs.