nox emission trends over chinese cities estimated from omi observations during 2005 to 2015
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2017
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Abstract
Satellite nitrogen dioxide (NO2) observations have been widely used to
evaluate emission changes. To determine trends in nitrogen oxides (NOx)
emission over China, we used a method independent of chemical transport
models to quantify the NOx emissions from 48 cities and seven power
plants over China, on the basis of Ozone Monitoring Instrument (OMI) NO2
observations from 2005 to 2015. We found that NOx 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 schedules for emission control in different sectors. The
time series of the derived NOx emissions was consistent with the
bottom-up emission inventories for all power plants (r = 0. 8 on average), but
not for some cities (r = 0. 4 on average). The lack of consistency observed
for cities was most probably due to the high uncertainty of bottom-up urban
emissions used in this study, which were derived from downscaling the
regional-based emission data to city level by using spatial distribution proxies.
| Reference Key |
liu2017atmosphericno<sub><i>x</i></sub>
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|---|---|
| Authors | ;F. Liu;F. Liu;F. Liu;F. Liu;F. Liu;S. Beirle;Q. Zhang;R. J. van der A;R. J. van der A;B. Zheng;D. Tong;K. He;K. He |
| Journal | Journal of agricultural and food chemistry |
| Year | 2017 |
| DOI |
10.5194/acp-17-9261-2017
|
| URL | |
| Keywords |
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