NO_x emission trends over Chinese cities estimated from OMI observations during 2005 to 2015.

ABSTRACT: Satellite NO₂ observations have been widely used to evaluate emission changes. To determine trends in NO_x emission over China, we used a method independent of chemical transport models to quantify the NO_x emissions from 48 cities and 7 power plants over China, on the basis of Ozone Monitoring Instrument (OMI) NO₂ observations during 2005 to 2015. We found that NO_x emissions over 48 Chinese cities increased by 52% from 2005 to 2011 and decreased by 21% from 2011 to 2015. The decrease since 2011 could be mainly attributed to emission control measures in power sector; while cities with different dominant emission sources (i.e. power, industrial and transportation sectors) showed variable emission decline timelines that corresponded to the

SUBMITTER: Liu F 

PROVIDER: S-EPMC5664226 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature