The analyses for characteristics of urban meteorology in Quito, Ecuador

2018 ◽  
Vol 37 (2) ◽  
pp. 121-135
Author(s):  
Il-Soo Park ◽  
Yu-Woon Jang ◽  
Woo-Jeong Lee ◽  
Gang-Woong Lee ◽  
Kyung-Won Chung ◽  
...  
Keyword(s):  
Urban Meteorology

The effects of anthropogenic heat fluxes on regional meteorology and air quality in typical city clusters of China

2020 ◽  
Author(s):  
Min Xie ◽  
Tijian Wang ◽  
Jie Shi ◽  
Mengmeng Li ◽  
Da Gao ◽  
...  
Keyword(s):  
Air Quality ◽  
Wind Speed ◽  
Significant Role ◽  
Air Pollutants ◽  
Heat Fluxes ◽  
Anthropogenic Heat ◽  
Atmospheric Environment ◽  
Urban Meteorology ◽  
Ozone Concentrations ◽  
Chemical Effects

<p>Anthropogenic heat (AH) can affect regional meteorology and air quality. The spatial distributions of AH fluxes in the typical city clusters of China are estimated. Moreover, in order to study their impacts on regional atmospheric environment, these heat fluxes are incorporated into the modified WRF/Chem with the seasonal and the diurnal variation. The modeling results show that AH fluxes over YRD and PRD have been growing in recent years. The high values of AH can reach 113.5 W/m<sup>2</sup> in YRD and 60 W/m<sup>2</sup> in PRD, respectively. AH fluxes can significantly change the urban meteorology. In YRD, 2-m air temperature (T<sub>2</sub>) increases by 1.6 °С in January and 1.4°С in July, the planetary boundary layer height (PBLH) rises up by 140m in January and 160m in July, and 10-m wind speed (W<sub>10</sub>) is intensified by 0.7 m/s in January and 0.5 m/s in July. More moisture can be transported to higher levels, and increase the accumulative precipitation by 15-30% in July of YRD. In PRD, T<sub>2</sub> rises up by 1.1°С in January and over 0.5°С in July, the PBLH increases by 120m in January and 90m in July, W<sub>10</sub> is enhanced over 0.35 m/s in January and 0.3 m/s in July, and the accumulative precipitation is intensified by 20-40% in July. These changes in meteorology can influence the distribution of air pollutants as well. Due to the increase of PBLH, surface wind speed and upward movement, the concentrations of primary air pollutants decrease near surface and increase at the upper layers over the cities. Chemical effects can play a significant role in ozone changes over the urban areas of YRD, so ozone concentrations increase at surface and decrease at the upper layers. In PRD cities, however, the chemical effects play a significant role in ozone changes in winter, while the vertical movement can be the dominant effect in summer. Thus, ozone concentrations in big cities increase in January, but decrease at the lower layers and increase at the upper layers in July. In all, AH fluxes should not be ignored in urban meteorology and air quality assessments.</p>

scholarly journals Impact of climate change in urban meteorology and energy demand

2016 ◽  
pp. 447-451
Author(s):  
R. San José ◽  
J.L. Pérez ◽  
R.M. González ◽  
J. Pecci ◽  
A. Garzón ◽  
...  
Keyword(s):  
Climate Change ◽  
Energy Demand ◽  
Urban Meteorology ◽  
Impact Of Climate Change

scholarly journals Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description

2008 ◽  
Vol 8 (3) ◽  
pp. 523-543 ◽  
Author(s):  
A. Baklanov ◽  
P. G. Mestayer ◽  
A. Clappier ◽  
S. Zilitinkevich ◽  
S. Joffre ◽  
...  
Keyword(s):  
Air Pollution ◽  
Urban Areas ◽  
Prediction Models ◽  
Weather Prediction ◽  
Surface Fluxes ◽  
Surface Exchange ◽  
Urban Meteorology ◽  
Recent Developments ◽  
Urban Roughness ◽  
Meteorology And Air Pollution

Abstract. The increased resolution of numerical weather prediction models allows nowadays addressing more realistically urban meteorology and air pollution processes. This has triggered new interest in modelling and describing experimentally the specific features and processes of urban areas. Recent developments and results performed within the EU-funded project FUMAPEX on integrated systems for forecasting urban meteorology and air pollution are reported here. Sensitivity studies with respect to optimum resolution, parametrisation of urban roughness and surface exchange fluxes and the role of urban soil layers are carried out with advanced meso- or sub-meso meteorological models. They show that sensible improvements can be achieved by higher model resolution that is accompanied with better description of urban surface features. Recommendations, especially with respect to advanced urban air quality forecasting and information systems, are given together with an assessment of the needed further research and data.

scholarly journals Effect of urbanization on the urban meteorology and air pollution in Hangzhou

2015 ◽  
Vol 29 (6) ◽  
pp. 950-965 ◽  
Author(s):  
Hongnian Liu ◽  
Wanli Ma ◽  
Junlong Qian ◽  
Juzhen Cai ◽  
Xianman Ye ◽  
...  
Keyword(s):  
Air Pollution ◽  
Urban Meteorology ◽  
Meteorology And Air Pollution

scholarly journals Implementation of Observed Sky-View Factor in a Mesoscale Model for Sensitivity Studies of the Urban Meteorology

2018 ◽  
Vol 10 (7) ◽  
pp. 2183 ◽  
Author(s):  
Marcos de Morais ◽  
Edmilson de Freitas ◽  
Edson Marciotto ◽  
Viviana Guerrero ◽  
Leila Martins ◽  
...  
Keyword(s):  
Mesoscale Model ◽  
View Factor ◽  
Urban Meteorology ◽  
Sky View Factor ◽  
Sensitivity Studies
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