Paradigm shift in aerosol chemical composition over regions downwind of China.

ABSTRACT: A rapid decrease in PM_2.5 concentrations in China has been observed in response to the enactment of strong emission control policies. From 2012 to 2017, total emissions of SO₂ and NO_x from China decreased by approximately 63% and 24%, respectively. Simultaneously, decreases in the PM_2.5 concentration in Japan have been observed since 2014, and the proportion of stations that satisfy the PM_2.5 environmental standard (daily, 35 µg/m³; annual average, 15 µg/m³) increased from 37.8% in fiscal year (FY) 2014 (April 2014 to March 2015) to 89.9% in FY 2017. However, the quantitative relationship between the PM_2.5 improvement in China and the PM_2.5 concentration in downwind regions is not well unders

SUBMITTER: Uno I 

PROVIDER: S-EPMC7160133 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature