Integrated analysis of regime shift of Asian PM2.5 pollution

About this project

Japan Grant Number
JP18H03359
Funding Program
Grants-in-Aid for Scientific Research
Funding organization
Japan Society for the Promotion of Science
Project/Area Number
18H03359
Research Category
Grant-in-Aid for Scientific Research (B)
Allocation Type
  • Single-year Grants
Review Section / Research Field
  • Basic Section 63010:Environmental dynamic analysis-related
Research Institution
  • Kyushu University
Project Period (FY)
2018-04-01 〜 2022-03-31
Project Status
Completed
Budget Amount*help
17,290,000 Yen (Direct Cost: 13,300,000 Yen Indirect Cost: 3,990,000 Yen)

Research Abstract

Changes in the composition of aerosol chemical components resulting from changes in emissions in China from 2012 to 2021 are summarized. (1) The impact of environmental improvements in China was quantitatively evaluated and source-receptor analysis using a chemical transport model revealed that PM2.5 concentrations in downwind areas were improved. However, the difference in SO2 and NOx reduction rates was due to a chemical imbalance in the ammonia-nitrate-sulfate-water system, which resulted in more nitrate generation. Observations and numerical modeling on a clean remote island in western Japan confirmed that the major component in PM2.5 is changing from sulfate to nitrate (paradigm shift); the effect of lockdown associated with the spread of COVID-19 was also added to the study.

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