Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Simulations on the Effect of Sea–Land Breezes on Atmospheric Haze over the Pearl River Delta Region
Abstract The atmospheric haze over the Pearl River Delta (PRD) was investigated by using the Models-3 Community Multi-scale Air Quality modeling system with meteorological fields simulated by the Fifth-generation National Center for Atmospheric Research/Penn State University Mesoscale Model (MM5) from September 26th to September 30th, 2004. The model-simulated meteorological elements and particulate matter with aerodynamic diameter less than 10 μm ($ PM_{10} $) were compared with observations at four air quality-monitoring stations. The results showed that MM5 successfully reproduced the diurnal variations of temperature, wind speed, and wind directions at these stations. The temporal variations of the simulated values were consistent with those of the observed (such as temperature, wind speed, and wind direction). The correlation coefficient was 0.91 for temperature and 0.56 for wind speed. The modeling results show that the spatial distributions of simulated $ PM_{10} $ were closely related to the source emissions indicating three maxima of $ PM_{10} $ over the PRD. The sea–land breezes diurnal cycle played a significant role in the redistribution and transport of $ PM_{10} $. Nighttime land breeze could transport $ PM_{10} $ to the coast and the sea, while daytime sea breeze (SB) could carry the accumulated $ PM_{10} $ offshore back to the inland cities. $ PM_{10} $ could also be transported vertically to a height of up to about 1000 m because of strong turbulence in the SB front. Process analyses indicated that the emission sources and the vertical diffusion were the major processes to influence the concentrations of particulate matter with aerodynamic diameter less than 2.5 μm ($ PM_{2.5} $).
Numerical Simulations on the Effect of Sea–Land Breezes on Atmospheric Haze over the Pearl River Delta Region
Abstract The atmospheric haze over the Pearl River Delta (PRD) was investigated by using the Models-3 Community Multi-scale Air Quality modeling system with meteorological fields simulated by the Fifth-generation National Center for Atmospheric Research/Penn State University Mesoscale Model (MM5) from September 26th to September 30th, 2004. The model-simulated meteorological elements and particulate matter with aerodynamic diameter less than 10 μm ($ PM_{10} $) were compared with observations at four air quality-monitoring stations. The results showed that MM5 successfully reproduced the diurnal variations of temperature, wind speed, and wind directions at these stations. The temporal variations of the simulated values were consistent with those of the observed (such as temperature, wind speed, and wind direction). The correlation coefficient was 0.91 for temperature and 0.56 for wind speed. The modeling results show that the spatial distributions of simulated $ PM_{10} $ were closely related to the source emissions indicating three maxima of $ PM_{10} $ over the PRD. The sea–land breezes diurnal cycle played a significant role in the redistribution and transport of $ PM_{10} $. Nighttime land breeze could transport $ PM_{10} $ to the coast and the sea, while daytime sea breeze (SB) could carry the accumulated $ PM_{10} $ offshore back to the inland cities. $ PM_{10} $ could also be transported vertically to a height of up to about 1000 m because of strong turbulence in the SB front. Process analyses indicated that the emission sources and the vertical diffusion were the major processes to influence the concentrations of particulate matter with aerodynamic diameter less than 2.5 μm ($ PM_{2.5} $).
Numerical Simulations on the Effect of Sea–Land Breezes on Atmospheric Haze over the Pearl River Delta Region
Xun-lai, Chen (Autor:in) / Ye-rong, Feng (Autor:in) / Jiang-nan, Li (Autor:in) / Wen-shi, Lin (Autor:in) / Shao-jia, Fan (Autor:in) / An-yu, Wang (Autor:in) / Soikun, Fong (Autor:in) / Hui, Lin (Autor:in)
2007
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
43.00
Umweltforschung, Umweltschutz: Allgemeines
/
43.00$jUmweltforschung$jUmweltschutz: Allgemeines
| Taylor & Francis Verlag | 2011
Hong Kong's Port in the Pearl River Delta Region
| British Library Conference Proceedings | 1996