碩士 / 國立中央大學 / 大氣物理研究所 / 100 / Pearl River Delta (PRD) is located in southern China near the coastline. It is one the most populated regions in China with more than 50 million people living in this area. Through the last two decades, PRD region has experienced the unprecedented land-use and land-cover changes as a result of rapid economic development and urban expansion. Its possible impact on regional air quality and climate change is a major concern of the national government as well as the global community.
In this study, Weather Research and Forecasting (WRF) meteorological model is performed using the updated land use data for a high ozone event (October 24 to 26, 2007). In addition, the land use data is re-classified and updated using the 500-m resolution Moderate Resolution Imaging Spectroradiometer (MODIS) satellite products.
The simulation using the updated land use data improves the wind speed, temperature and wind direction. Analysis of the wind field simulation result demonstrated that the see-breeze flow direction is opposite to the prevailing wind (1300 to 1800 LST) that forms a stagnant wind condition near the Macao and Pearl River Estuary region. The sustained sunlight combined with stagnant wind condition favors the accumulation of the air pollutants. The trajectory analysis showed that the ozone concentration is transported from Shen-Zhen and Dong-Guan industrial area in the Guang-Dong province.
| Identifer | oai:union.ndltd.org:TW/100NCU05021028 |
| Date | January 2012 |
| Creators | Ka-wa Chan, 陳嘉華 |
| Contributors | Fang-yi Cheng, 鄭芳怡 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 105 |
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