Rapid decline in carbon monoxide emissions and export from East Asia between years 2005 and 2016

AMS Citation:
Zheng, B., and Coauthors, 2018: Rapid decline in carbon monoxide emissions and export from East Asia between years 2005 and 2016. Environmental Research Letters, 13, 044007, doi:10.1088/1748-9326/aab2b3.
Date:2018-04-01
Resource Type:article
Title:Rapid decline in carbon monoxide emissions and export from East Asia between years 2005 and 2016
Abstract: Measurements of Pollution in the Troposphere (MOPITT) satellite and ground-based carbon monoxide (CO) measurements both suggest a widespread downward trend in CO concentrations over East Asia during the period 2005-2016. This negative trend is inconsistent with global bottom-up inventories of CO emissions, which show a small increase or stable emissions in this region. We try to reconcile the observed CO trend with emission inventories using an atmospheric inversion of the MOPITT CO data that estimates emissions from primary sources, secondary production, and chemical sinks of CO. The atmospheric inversion indicates a similar to -2% yr(-1) decrease in emissions from primary sources in East Asia from 2005-2016. The decreasing emissions are mainly caused by source reductions in China. The regional MEIC inventory for China is the only bottom up estimate consistent with the inversion-diagnosed decrease of CO emissions. According to the MEIC data, decreasing CO emissions from four main sectors (iron and steel industries, residential sources, gasoline-powered vehicles, and construction materials industries) in China explain 76% of the inversion-based trend of East Asian CO emissions. This result suggests that global inventories underestimate the recent decrease of CO emission factors in China which occurred despite increasing consumption of carbon-based fuels, and is driven by rapid technological changes with improved combustion efficiency and emission control measures.
Peer Review:Refereed
Copyright Information:Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
OpenSky citable URL: ark:/85065/d7k076z3
Publisher's Version: 10.1088/1748-9326/aab2b3
Author(s):
  • Bo Zheng
  • Frederic Chevallier
  • Philippe Ciais
  • Yi Yin
  • Merritt N Deeter - NCAR/UCAR
  • Helen M Worden - NCAR/UCAR
  • Yilong Wang
  • Qiang Zhang
  • Kebin He
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