May: New paper from our group member

Congrats Ms. Bin Luo for the new paper published on Atmospheric Chemistry and Physics.

恭喜博士生骆滨在ACP发表"Spatial–temporal patterns in anthropogenic and biomass burning emission contributions to air pollution and mortality burden changes in India from 1995 to 2014"。

在这篇文章中，我们利用全球大气化学模型分析了印度1995-2014年间PM_2.5和O₃时空变化趋势，结合人口/死亡率数据分析了空气污染带来的死亡率的变化，进而分析了人为源和生物源对空气质量影响的贡献。

Luo, B., Zhang, Y*., Tang, T., Zhang, H., Hu, J., Mu, J., Wang, W., and Xue, L*.: Spatial–temporal patterns in anthropogenic and biomass burning emission contributions to air pollution and mortality burden changes in India from 1995 to 2014, Atmos. Chem. Phys., 25, 4767–4783, https://doi.org/10.5194/acp-25-4767-2025, 2025.

Abstract: 

Anthropogenic (ANTHRO) and biomass burning (BB) emissions are major contributors to ambient air pollution, with the latter playing a particularly dominant role in nonurban regions. India has experienced a dramatic deterioration in air quality over the past few decades, but no systematic assessment has been conducted to investigate the individual contributions of ANTHRO and BB emission changes over the long term in India, particularly in nonurban areas. In this study, we conduct a comprehensive analysis of the long-term trends in particulate matter with aerodynamic diameters < 2.5 µm (PM_2.5) and ozone (O₃) in India and their mortality burden changes from 1995 to 2014, using a state-of-the-art high-resolution global chemical transport model (CAM-chem). Our simulations reveal a substantial nationwide increase in annual mean PM_2.5 (6.71 µg m⁻³ per decade) and O₃ (7.08 ppbv per decade), with the Indo-Gangetic Plain (IGP) and eastern central India serving as hotspots for PM_2.5 and O₃ trend changes, respectively. It is noteworthy that substantial O3 decreases were observed in the northern IGP, potentially linked to nitric oxide (NO) titration due to a surge in nitrogen oxides (NOx) emissions. Sensitivity analyses highlight ANTHRO emissions as primary contributors to rising PM_2.5 and O₃, while BB emissions play a prominent role in winter and spring. In years with high BB activity, the contributions from BB emissions to both PM_2.5 and O₃ changes were comparable to or even exceeded ANTHRO emissions in specific areas. We further estimate that the elevated air pollutant levels were associated with increased premature mortality attributable to PM_2.5 and O₃, leading to 97 830 and 73 911 deaths per decade. Although there has been a decrease in premature mortality per capita in the IGP region, population increase has offset its effectiveness.