TY - JOUR
T1 - Turnaround of tropospheric nitrogen dioxide pollution trends in China, Japan, and South Korea
AU - Irie, Hitoshi
AU - Muto, Takuya
AU - Itahashi, Syuichi
AU - Kurokawa, Jun Ichi
AU - Uno, Itsushi
N1 - Funding Information:
This work was supported by a KAKENHI grant (number 25220101), the JST/CREST/EMS/TEEDDA fund, and a JAXA/GCOM-C fund. We are grateful for the use of OMI tropospheric NO
Publisher Copyright:
© 2016, the Meteorological Society of Japan.
PY - 2016
Y1 - 2016
N2 - Long-term (2005-2015) tropospheric nitrogen dioxide (NO2) column data recorded by the satellite-borne Ozone Monitoring Instrument (OMI) in East Asia were analyzed to investigate annual trends on an national basis and their potential causes. We found an evident decrease of 6% year-1 in the NO2 level over China after 2011. The grid-basis trend analysis implies that the rapid decrease occurred on a provincial or larger spatial scale and was likely due to a nationwide action such as the widespread use of denitrification units. In Japan and South Korea, a turnaround indicating an increase was observed after 2013 and 2012, respectively. As a consequence, the tropospheric NO2 pollution level in East Asia was found to be recovered to the 5-year-ago level in 2015.
AB - Long-term (2005-2015) tropospheric nitrogen dioxide (NO2) column data recorded by the satellite-borne Ozone Monitoring Instrument (OMI) in East Asia were analyzed to investigate annual trends on an national basis and their potential causes. We found an evident decrease of 6% year-1 in the NO2 level over China after 2011. The grid-basis trend analysis implies that the rapid decrease occurred on a provincial or larger spatial scale and was likely due to a nationwide action such as the widespread use of denitrification units. In Japan and South Korea, a turnaround indicating an increase was observed after 2013 and 2012, respectively. As a consequence, the tropospheric NO2 pollution level in East Asia was found to be recovered to the 5-year-ago level in 2015.
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U2 - 10.2151/sola.2016-035
DO - 10.2151/sola.2016-035
M3 - Article
AN - SCOPUS:85007531063
SN - 1349-6476
VL - 12
SP - 170
EP - 174
JO - Scientific Online Letters on the Atmosphere
JF - Scientific Online Letters on the Atmosphere
ER -