| 山谷风环流控制下的大气污染物输送和扩散过程:二维数值模拟研究 |
| |
| 引用本文： | 邱崇践,蒲朝霞.山谷风环流控制下的大气污染物输送和扩散过程:二维数值模拟研究[J].高原气象,1991(4). |
| |
| 作者姓名： | 邱崇践 蒲朝霞 |
| |
| 作者单位： | 兰州大学大气科学系 甘肃省兰州市
(邱崇践)，兰州大学大气科学系 甘肃省兰州市(蒲朝霞) |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 本文以兰州地区的实际地形为背景,建立了一个二维小尺度数值模式,并用它对山谷之间热力差异造成的山谷风环流及其控制下山谷中高架源排放的污染物输送和扩散过程进行了模拟研究。结果表明,在山谷风环流控制下,造成山谷内高污染浓度的主要因素有两个:一是日出前和日落后山谷风的转换;二是在白天由于山谷风环流所造成的山谷上空较强的下沉气流。
|
| 关 键 词： | 山谷风环流 空气污染 二维数值模拟 |
THE TRANSPORTATION AND DISPERSION OF AIR POLLUTANTS CONTROLLED BY MOUNTAIN-VALLEY CIRCULATION: TWO-DIMENSIONAL NUMERICAL SIMULATION |
| |
| Qiu Chongjian and Pu Zhaoxia.THE TRANSPORTATION AND DISPERSION OF AIR POLLUTANTS CONTROLLED BY MOUNTAIN-VALLEY CIRCULATION: TWO-DIMENSIONAL NUMERICAL SIMULATION[J].Plateau Meteorology,1991(4). |
| |
| Authors: | Qiu Chongjian and Pu Zhaoxia |
| |
| Abstract: | In this paper, a two-dimensional numerical micro-scale model is given in the background of real terrains of Lanzhou city. The mountain-valley wind caused by heating difference, and the process of air pollutants transportation and dispersion from elevated source are simulated using this model. It shows that there are two factors to bring about serious air pollution, one is a transition of the mountain-valley wind around sunrise and sunset, the other is the strong downdraft caused by mountain-valley circulation over the valley at daytime. |
| |
| Keywords: | Mountain-valley wind Air pollution Two-dimensional numerical model |
| 本文献已被 CNKI 等数据库收录！ |
