城市热岛环流

受城市热岛环流影响，郊区地面风向指向市区；

In the influence of city heat island circulation , suburban surface wind is urbanward ;

作者重点模拟和分析了济南地区两种典型的中尺度局地环流&城市热岛环流和山谷风环流。

The emphasis of the research is put on the simulation of the local circulations in Jinan , such as heat island circulation , mountain-valley breeze .

而当海陆风环流和城市热岛环流发展到一定阶段并在城市上空叠加时，使近地面水平风速增大，并在上海地区形成三条明显的水平风辐合带。

When the sea-breeze circulation ( SBC ) and the heat-island circulation ( HIC ) develop adequately and interact each other over the urban , such interaction intensifies the sea-breeze velocity and generates three horizontal convergent zones in Shanghai .

此外，当大范围系统风较弱时，珠江三角洲大气边界层还受局地海陆风、城市热岛环流和山谷风的共同影响。

Moreover , when the wind of large range system was weak relatively , atmospheric boundary layer of Pearl River Delta was also controlled by the combined influence of the sea-land breeze , urban heat island circulation and the mountain-valley wind .

数值模拟结果表明：（1）北京地区的气象环境很复杂，其主要特点是受昼夜循环的山谷风气流、城市热岛环流以及大尺度系统共同影响。

The results show : ( 1 ) The meteorological environment over the Beijing area is complex , which is controlled mainly by the combined influence of the mountain valley wind circulation cycling day and night , the urban heat island circulation , and large scale system .

济南市城市热岛和山谷风环流的模拟研究

A Simulation of Heat Island Circulation and Mountain-Valley Breeze in Jinan

城市化对局地环流的影响主要是对城市热岛环流的影响，对湖陆风环流并没有明显的直接影响。

The effect of Urbanization is mainly on urban heat island circulation , and there is no obvious direct impact on the lake breeze circulation .

考虑特定的沿海城市背景，还需着重考虑不同天气条件下，城市热岛环流和海陆风对不同粒径的气溶胶输送及光化学烟雾形成的影响。

For special coastal cities , Aerosol transportation and photochemical smog formation shall be considered from the influence of urban heat island current and sea-land wind under different weather conditions .

在正常城市气溶胶污染情况下，气溶胶对城市热岛强度影响不大，但可使城市热岛环流稍有增加。

In the city polluted normally by aerosols , the influence of aerosols on the intensity of urban heat island isn 't large , but they can increase slightly urban heat island circulation .

本文使用非定常非线性二维数值模式，研究夜间气流流经城市热岛上空引起的风场、温度场和垂直涡旋扩散参数的调整以及城市热岛环流的发展演变。

A nonlinear and non-steady two-dimensional numerical model is used to study the thermal effect of urbanization on wind , temperature and vertical eddy diffusion coefficient and the evolution of nocturnal urban heat island circulation .