Thermodynamical framework for effective mitigation of high aerosol loading in the Indo-Gangetic Plain during winter

Author:

Acharja Prodip1,Ghude Sachin D.1,Sinha Baerbel2,Barth Mary3,Kulkarni Rachana4,Sinha Vinayak2,Kumar Rajesh3,Ali Kaushar1,Govardhan Gaurav1,Gultepe Ismail5,Rajeevan Madhavan Nair6

Affiliation:

1. Indian Institute of Tropical Meteorology

2. Indian Institute of Science Education and Research Mohali

3. National Center for Atmospheric Research

4. Savitribai Phule Pune University

5. ECCC

6. Ministry of Earth Sciences

Abstract

Abstract The Indo-Gangetic Plain (IGP) experiences severe air pollution every winter, with ammonium chloride and ammonium nitrate as the major inorganic fractions of fine aerosols. Many past attempts to tackle air pollution in the IGP were inadequate, as they targeted a subset of the primary pollutants in an environment where the majority of the particulate matter burden is secondary in nature. Here, we provide new mechanistic insight into aerosol mitigation by integrating the ISORROPIA-II thermodynamical model with high-resolution simultaneous measurements of precursor gases and aerosols. A mathematical framework is explored to investigate the complex interaction between hydrochloric acid (HCl), nitrogen oxides (NOx), ammonia (NH3), and aerosol liquid water content (ALWC). Aerosol acidity (pH) and ALWC emerge as governing factors that modulate the gas-to-particle phase partitioning and mass loading of fine aerosols. Six "sensitivity regimes" were defined, where PM1 and PM2.5 fall in the "HCl and HNO3 sensitive regime", emphasizing that HCl and HNO3 reductions would be the most effective pathway for aerosol mitigation in the IGP, which is ammonia-rich during winter. This study provides evidence that precursor abatement for aerosol mitigation should not be based on their descending mass concentrations but instead on their sensitivity to high aerosol loading.

Publisher

Research Square Platform LLC

Reference59 articles.

1. Premature mortality in India due to PM2.5 and ozone exposure;Ghude SD;Geophysical Research Letters,2016

2. World Health Organization, 2016. Ambient air pollution: A global assessment of exposure and burden of disease.

3. Effectiveness of ammonia reduction on control of fine particle nitrate;Guo H;Atmospheric Chemistry and Physics,2018

4. Aerosol acidity and liquid water content regulate the dry deposition of inorganic reactive nitrogen;Nenes A;Atmos. Chem. Phys. Discuss,2020

5. Ibikunle, I., Beyersdorf, A., Campuzano-Jost, P., Corr, C., Crounse, J.D., Dibb, J., Diskin, G., Huey, G., Jimenez, J.L., Kim, M.J. and Nault, B.A., 2020. Fine particle pH and sensitivity to NH3 and HNO3 over summertime South Korea during KORUS-AQ. Atmospheric Chemistry and Physics Discussions, pp.1–42.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3