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Song, Chang-Keun
Air Quality Impact Assessment Research Lab.
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Temporal and spatial distribution of tropospheric NO2 over Northeast Asia using OMI data during the years 2005-2010

Author(s)
Kim, Deok-RaeLee, Jae-BumSong, Chang KeunKim, Seung-YeonMa, Young-IlLee, Kyung-MiCha, Jun-SeokLee, Sang-Deok
Issued Date
2015-09
DOI
10.5094/APR.2015.085
URI
https://scholarworks.unist.ac.kr/handle/201301/20946
Fulltext
http://www.sciencedirect.com/science/article/pii/S1309104215301690
Citation
ATMOSPHERIC POLLUTION RESEARCH, v.6, no.5, pp.768 - 777
Abstract
This study aimed to examine the main characteristics of tropospheric nitrogen dioxide (NO2) concentrations over the Northeast Asia, using the Ozone Monitoring Instrument (OMI) data from 2005 to 2010. The annual mean NO2 concentrations (AMNC) had an increasing trend mainly due to increasing NO2 emissions in China except during the 2008 Beijing Olympic Games period, while the reduction policies of South Korea and Japan have led it to be stagnant or decreased. To investigate further regional characteristics of NO2 increasing trends in China, we divided our study area into 6 geographical regions (sectors 1-6) and then considering 4 different socio-economic levels (groups 1-4) among main cities in Eastern regions (sector 2 and 4) where the concentrations level is the highest in China and NO2 concentrations show continued increasing trend. Especially OMI NO2 and emissions consistently showed that metropolitan/big-sized and developed cities (group 1), such as Beijing and Shanghai, had an increasing trend of NO2 concentrations until 2007 and decreasing thereafter, while small/mid-sized and developing cities (groups 2 and 3) kept a continuous increasing trend over all periods. The seasonal change in NO2 concentrations showed the apparent increasing trend in winter and no significant trend in summer in all groups except for group 1. These results indicate that an increase in AMNC in Northeast Asia was mainly attributed to the increasing NO2 concentrations in winter in groups 2 and 3. Therefore, it strongly suggests the importance of the NO2 management for groups 2 and 3 to improve air quality in the Northeast Asia.
Publisher
TURKISH NATL COMMITTEE AIR POLLUTION RES & CONTROL-TUNCAP
ISSN
1309-1042
Keyword (Author)
NO2OMIsatelliteNortheast AsiaChina
Keyword
OZONE MONITORING INSTRUMENTIN-SITU MEASUREMENTSLONG-TERM TRENDSSATELLITE-OBSERVATIONSEMISSION INVENTORYMODEL SIMULATIONSCOLUMN RETRIEVALPOWER-PLANTSPAST DECADEEAST-ASIA

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