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We assessed the ability of the MM5/CMAQ model to predict ozone (O3) air quality over the Kanto area and to investigate the factors
that a ect simulation of O3. We find that the coupled MM5/CMAQ model is a useful tool for the analysis of urban environmental
problems. The simulation results were compared with observational data and were found to accurately replicate most of the important
observed characteristics. The initial and boundary conditions were found to have a significant e ect on simulated O3 concentrations.
The results show that on hot and dry days with high O3 concentration, the CMAQ model provides a poor simulation of O3 maxima when
using initial and boundary conditions derived from the CMAQ default data. The simulation of peak O3 concentrations is improved with
the JCAP initial and boundary conditions. On mild days, the default CMAQ initial and boundary conditions provide a more realistic
simulation. Meteorological conditions also have a strong impact on the simulated distribution and accumulation of O3 concentrations
in this area. Low O3 concentrations are simulated during mild weather conditions, and high concentrations are predicted during hot
and dry weather. By investigating the e ects of di erent meteorological conditions on each model process, we find that advection and
di usion di er the most between the two meteorological regimes. Thus, di erences in the winds that govern the transport of O3 and its
precursors are likely the most important meteorological drivers of ozone concentration over the central Kanto area. 相似文献
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沈阳位于中国东北地区南部,是东北地区最大的中心城市,有“东方鲁尔”“共和国第一长子”的美誉.沈阳地处东北亚经济圈和环渤海经济圈的中心,是正在建设中的沈阳经济区(沈阳都市圈)的核心城市,工业门类齐全,是长三角、珠三角、京津冀地区通往关东地区的综合枢纽城市,具有重要的战略地位. 相似文献
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