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Trends of tropospheric NO2 over the Yangtze River Delta region and the possible linkage to rapid urbanization
Author(s): Mingliang Ma; Deying Zhang; Qiyang Liu; Yue Song; Jiayuan Zhou; Runhe Shi; Wei Gao; Zhibin Sun
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Paper Abstract

Over the past decade, China has experienced a rapid increase in urbanization. The urban built-up areas (population) of Shanghai increased by 16.1% (22.9%) from 2006 to 2015. This study aims to analyze the variations of tropospheric NO2 over Yangtze River Delta region and the impacts of rapid urbanization during 2006-2015. The results indicate that tropospheric NO2 vertical column density (VCD) of all cities in the study area showed an increasing trend during 2006-2011 whereas a decreasing trend during 2011-2015. Most cities showed a lower tropospheric NO2 VCD value in 2015 compared to that in 2006, except for Changzhou and Nantong. Shanghai and Ningbo are two hotspots where the tropospheric NO2 VCD decreased most significantly, at a rate of 22% and 19%, respectively. This effect could be ascribed to the implementation of harsh emission control policies therein. Similar seasonal variability was observed over all cities, with larger values observed in the summer and smaller values shown in the winter. Further investigations show that the observed increasing trend of tropospheric NO2 during 2006-2011 could be largely explained by rapid urbanization linked to car ownership, GDP, power consumption, population and total industrial output. Such effect was not prominent after 2011, mainly due to the implementation of emission control strategies.

Paper Details

Date Published: 1 September 2017
PDF: 14 pages
Proc. SPIE 10405, Remote Sensing and Modeling of Ecosystems for Sustainability XIV, 104050T (1 September 2017); doi: 10.1117/12.2272698
Show Author Affiliations
Mingliang Ma, East China Normal Univ. (China)
Deying Zhang, East China Normal Univ. (China)
Qiyang Liu, East China Normal Univ. (China)
Yue Song, Shanghai Shixi High School (China)
Jiayuan Zhou, East China Normal Univ. (China)
Runhe Shi, East China Normal Univ. (China)
Wei Gao, East China Normal Univ. (China)
USDA UV-B Monitoring and Research Program (United States)
Colorado State Univ. (United States)
Zhibin Sun, USDA UV-B Monitoring and Research Program (United States)
Colorado State Univ. (United States)


Published in SPIE Proceedings Vol. 10405:
Remote Sensing and Modeling of Ecosystems for Sustainability XIV
Wei Gao; Ni-Bin Chang; Jinnian Wang, Editor(s)

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