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Characterization and speciation of n...

Tang, Jianhui.

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Characterization and speciation of non-methane hydrocarbons (NMHCs) and their implications on the atmosphere of South China.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Characterization and speciation of non-methane hydrocarbons (NMHCs) and their implications on the atmosphere of South China./
作者:	Tang, Jianhui.
面頁冊數:	164 p.
附註:	Adviser: Lo-Yin Chan.
Contained By:	Dissertation Abstracts International68-09B.
標題:	Atmospheric Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3282319
ISBN:	9780549247395

Characterization and speciation of non-methane hydrocarbons (NMHCs) and their implications on the atmosphere of South China.
Tang, Jianhui.

Characterization and speciation of non-methane hydrocarbons (NMHCs) and their implications on the atmosphere of South China. - 164 p.

Adviser: Lo-Yin Chan.

Thesis (Ph.D.)--Hong Kong Polytechnic University (Hong Kong), 2007.

A large pool of ambient and source NMHC data was obtained for the first time in various environments of South China, extending from less developed Yunnan and Hainan Provinces to more developed Guangdong and Zhejiang Provinces. The source and source regions of these C2-C10 NMHC species were assessed through comparison of the profiles and characteristic ratios of NMHC species in ambient and source samples. Tools such as backward air trajectory and satellite images are utilized. Analysis of NMHC profiles in these regions unveiled that there were complex characteristics of NMHCs involving different extents of contributions from urban vehicular and industrial emissions, local biofuel combustion and biogenic emissions, and biomass burning emissions. At the developed sites, such as Guangzhou in Pearl River Delta (PRD) and Lin'an in Yangtze River Delta (YRD), vehicular and industrial emissions were the major contributors. However, in rural and remote areas such as at Jiangfeng Mountain on Hainan Island and Tengchong Mountain in southwest of China, long-range transports of biomass burning pollution from the SE Asia subcontinent in addition to contributions from in situ biogenic and other local anthropogenic emissions from South China, are important sources of NMHCs in spring.

ISBN: 9780549247395Subjects--Topical Terms:

1019179
Atmospheric Sciences.

Characterization and speciation of non-methane hydrocarbons (NMHCs) and their implications on the atmosphere of South China.
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520 $a A large pool of ambient and source NMHC data was obtained for the first time in various environments of South China, extending from less developed Yunnan and Hainan Provinces to more developed Guangdong and Zhejiang Provinces. The source and source regions of these C2-C10 NMHC species were assessed through comparison of the profiles and characteristic ratios of NMHC species in ambient and source samples. Tools such as backward air trajectory and satellite images are utilized. Analysis of NMHC profiles in these regions unveiled that there were complex characteristics of NMHCs involving different extents of contributions from urban vehicular and industrial emissions, local biofuel combustion and biogenic emissions, and biomass burning emissions. At the developed sites, such as Guangzhou in Pearl River Delta (PRD) and Lin'an in Yangtze River Delta (YRD), vehicular and industrial emissions were the major contributors. However, in rural and remote areas such as at Jiangfeng Mountain on Hainan Island and Tengchong Mountain in southwest of China, long-range transports of biomass burning pollution from the SE Asia subcontinent in addition to contributions from in situ biogenic and other local anthropogenic emissions from South China, are important sources of NMHCs in spring.
520 $a More in depth studies were conducted in the urban sites of Guangzhou and at the rural site of Dinghu Mountain during 2001 to 2005. The levels of toluene increased in Dinghu Mountain but decreased in Guangzhou urban sites, which was contrary to the increase of industrial activities in this region. This was in part due to the implementation of stringent emission standards for polluting industries especially in the urban areas and the relocation of polluting industries from urban to the less developed parts of the PRD. We had found for the first time significant increase of propane levels in the urban air of Guangzhou, due to the introduction of LPG-fueled buses and taxis. The signatures of LPG influence were also found in Sanya of Hainan Province, where LPG was used as a fuel in Taxis.
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