| Impacts of Weather Conditions Modified by Urban Expansion on Surface Ozone： Comparison between the Pearl River Delta and Yangtze River Delta Regions |
| |
| 引用本文： | 王雪梅,陈飞,吴志勇,张美根.Impacts of Weather Conditions Modified by Urban Expansion on Surface Ozone： Comparison between the Pearl River Delta and Yangtze River Delta Regions[J].大气科学进展,2009,26(5):962-972. |
| |
| 作者姓名： | 王雪梅 陈飞 吴志勇 张美根 |
| |
| 作者单位： | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275,National Center for Atmospheric Research, Boulder, CO 80305, USA,School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,National Center for Atmospheric Research, Boulder, CO 80305, USA,National Center for Atmospheric Research, Boulder, CO 80305, USA,National Center for Atmospheric Research, Boulder, CO 80305, USA |
| |
| 基金项目： | The National Natural Science Foundation of China (General Program,40875076 and 40645024, Key Program U0833001);National Center for Atmospheric Research (NCAR) FY07 Director Opportunity Fund;Scientific research foundation for returned scholars of Ministry of Education of China;The Knowledge Innovation Program of the Chinese Academy of Sciences ( IAP 07306) and LAPC，Institute of Atmospheric Physics, Chinese Academy of Sciences（LAPC-KF-2006-12） |
| |
| 摘 要： |
|
| 关 键 词： | urbanization Pearl River Delta （PRD） Yangtze River Delta （YRD） surface ozone concen-trations WRF-Chem |
| 收稿时间： | 1 October 2009 |
Impacts of weather conditions modified by urban expansion on surface ozone: Comparison between the Pearl River Delta and Yangtze River Delta regions |
| |
| Xuemei?Wang,Fei?Chen,Zhiyong?Wu,Meigen?Zhang,Mukul?Tewari,Alex?Guenther,Christine?Wiedinmyer.Impacts of weather conditions modified by urban expansion on surface ozone: Comparison between the Pearl River Delta and Yangtze River Delta regions[J].Advances in Atmospheric Sciences,2009,26(5):962-972. |
| |
| Authors: | Xuemei Wang Fei Chen Zhiyong Wu Meigen Zhang Mukul Tewari Alex Guenther Christine Wiedinmyer |
| |
| Institution: | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275,National Center for Atmospheric Research, Boulder, CO 80305, USA,School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,National Center for Atmospheric Research, Boulder, CO 80305, USA,National Center for Atmospheric Research, Boulder, CO 80305, USA,National Center for Atmospheric Research, Boulder, CO 80305, USA |
| |
| Abstract: | In this paper, the online weather research and forecasting and chemistry (WRF-Chem) model
is used to explore the impacts of urban expansion on regional weather conditions and its implication
on surface ozone concentrations over the Pearl River Delta(PRD) and Yangtze River Delta(YRD) regions.
Two scenarios of urban maps are used in
the WRF-Chem to represent the early 1990s (pre-urbanization) and the current urban distribution in the
PRD and the YRD. Month-long simulation results using the above land-use scenarios for March 2001 show
that urbanization increases both the day- and night-time 2-m temperatures by about 0.6oC and
1.4oC, respectively. Daytime reduction in the wind speed by about 3.0 m s-1 is larger than
that for the nighttime (0.5 to 2 m s-1). The daytime increase in the PBL height (> 200 m) is
also larger than the nighttime (50--100 m). The meteorological conditions modified by urbanization
lead to detectable ozone-concentration changes in the PRD and the YRD. Urbanization increases the
nighttime surface-ozone concentrations by about 4.7%--8.5% and by about 2.9%--4.2% for the daytime.
In addition to modifying individual meteorological variables, urbanization also enhances the convergence
zones, especially in the PRD. More importantly, urbanization has different effects on the surface ozone
for the PRD and the YRD, presumably due to their urbanization characteristics and geographical locations.
Even though the PRD has a smaller increase in the surface temperature than the YRD, it has (a) weaker
surface wind speed, (b) smaller increase in PBL heights, and (c) stronger convergence zones. The latter
three factors outweighed the temperature increase and resulted in a larger ozone enhancement in the PRD
than the YRD. |
| |
| Keywords: | urbanization Pearl River Delta (PRD) Yangtze River Delta (YRD) surface ozone concentrations WRF-Chem |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
|
