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The Impact of Urbanization on Air St...

Li, Zhiqiang.

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The Impact of Urbanization on Air Stagnation: Shenzhen as a Case Study.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Impact of Urbanization on Air Stagnation: Shenzhen as a Case Study./
作者:	Li, Zhiqiang.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	300 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-05, Section: B.
Contained By:	Dissertations Abstracts International80-05B.
標題:	Climate Change. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=11012106
ISBN:	9780438658080

The Impact of Urbanization on Air Stagnation: Shenzhen as a Case Study.
Li, Zhiqiang.

The Impact of Urbanization on Air Stagnation: Shenzhen as a Case Study. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 300 p.

Source: Dissertations Abstracts International, Volume: 80-05, Section: B.

Thesis (Ph.D.)--The Chinese University of Hong Kong (Hong Kong), 2018.

This item must not be sold to any third party vendors.

Air stagnation is a protracted atmospheric episode characterized by poor air ventilation which is propitious for air pollutants to tarry over a region. While many studies have suggested that urbanization leads to the problem of poor air ventilation simply, few researchers have identified the impact of urbanization, which has upon the air stagnation in a region. Shenzhen, once a place that comprised small fishing and farming villages in southeastern China, has been fast developing in the past thirty years into a highly urbanized city. Along with the rapid urbanization process, the annual accumulated number of haze days has also been increasing in the past three decades. Therefore, it was a reasonable guess that urbanization explicitly caused the aggravation of air stagnation. This study aimed to take Shenzhen as an example to examine the relationship between urbanization and air stagnation through urban climate simulation. Taking a step further, this study also probed for the mechanism of impact of urbanization on air stagnation by using atmospheric theories. In this study, an urbanization impact model was developed to project the societal impacts of urbanization on the land surface attributes which affect urban climate so as to produce two land-surface datasets that represent the societal impacts of urbanization in 1979 and 2010. Moreover, an atmospheric model was developed to project the land surface attribute to the effect factors of the atmosphere. Thereafter, the WRF ARW Noah LSM/SLUCM modeling system was configured according to the atmospheric model and was used on the datasets to simulate the urban climate of these two years at a high spatial resolution of 1 km. The results showed that the numbers of total and grid-mean 6-hourly air stagnation cases have increased by 21,719 and 11.38 respectively in 2010 than in 1979, and the maximum increase of grid air stagnation cases reaches to 458, which indicates that urbanization has caused the aggravation of air stagnation in Shenzhen. Moreover, the impact of urbanization on air stagnation also had a trans-boundary effect. Comparing the situations before and after urbanization, the numbers of total and grid-mean 6-hourly air stagnation cases increased by 11,428 and 1.17 respectively in the adjacent areas of Shenzhen. Evidently, this study demonstrated a new scientific approach toward the evaluation of the impact of urbanization on air stagnation, which can, in turn, provide scientific evidence to facilitate future urban planning in China. Moreover, the discovered regulating mechanism in the number of air stagnation cases is useful in urban planning for mitigating the impact of urbanization on air stagnation. Furthermore, this study also provided a method for mitigating it, in an economically feasible way.

ISBN: 9780438658080Subjects--Topical Terms:

894284
Climate Change.

The Impact of Urbanization on Air Stagnation: Shenzhen as a Case Study.
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520 $a Air stagnation is a protracted atmospheric episode characterized by poor air ventilation which is propitious for air pollutants to tarry over a region. While many studies have suggested that urbanization leads to the problem of poor air ventilation simply, few researchers have identified the impact of urbanization, which has upon the air stagnation in a region. Shenzhen, once a place that comprised small fishing and farming villages in southeastern China, has been fast developing in the past thirty years into a highly urbanized city. Along with the rapid urbanization process, the annual accumulated number of haze days has also been increasing in the past three decades. Therefore, it was a reasonable guess that urbanization explicitly caused the aggravation of air stagnation. This study aimed to take Shenzhen as an example to examine the relationship between urbanization and air stagnation through urban climate simulation. Taking a step further, this study also probed for the mechanism of impact of urbanization on air stagnation by using atmospheric theories. In this study, an urbanization impact model was developed to project the societal impacts of urbanization on the land surface attributes which affect urban climate so as to produce two land-surface datasets that represent the societal impacts of urbanization in 1979 and 2010. Moreover, an atmospheric model was developed to project the land surface attribute to the effect factors of the atmosphere. Thereafter, the WRF ARW Noah LSM/SLUCM modeling system was configured according to the atmospheric model and was used on the datasets to simulate the urban climate of these two years at a high spatial resolution of 1 km. The results showed that the numbers of total and grid-mean 6-hourly air stagnation cases have increased by 21,719 and 11.38 respectively in 2010 than in 1979, and the maximum increase of grid air stagnation cases reaches to 458, which indicates that urbanization has caused the aggravation of air stagnation in Shenzhen. Moreover, the impact of urbanization on air stagnation also had a trans-boundary effect. Comparing the situations before and after urbanization, the numbers of total and grid-mean 6-hourly air stagnation cases increased by 11,428 and 1.17 respectively in the adjacent areas of Shenzhen. Evidently, this study demonstrated a new scientific approach toward the evaluation of the impact of urbanization on air stagnation, which can, in turn, provide scientific evidence to facilitate future urban planning in China. Moreover, the discovered regulating mechanism in the number of air stagnation cases is useful in urban planning for mitigating the impact of urbanization on air stagnation. Furthermore, this study also provided a method for mitigating it, in an economically feasible way.
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