2008年奥运会期间北京城区地面风场的分析  

Analysis of Ground Wind Field in Autumn Begins in Beijing City Zone

作　　者：张德山 穆启占 冯涛 赵娜 

机构地区：[1]北京市专业气象台,北京100089

出　　处：《气候与环境研究》2007年第4期573-579,共7页Climatic and Environmental Research

摘　　要：2008年8月8～24日北京奥运会期间,正逢中国24节气中的"立秋"。为探讨风向风速的气候变化规律,把北京城市划分成9个区域,利用9个区域中自动气象站连续监测的逐时最大风向风速数据样本,将360°风向划分为8个方位的风向,统计出该时段北京城市9个区域8个方位风向风速的气候特征:北风频率增大,南风频率减小;最大风速的风向频率日变化呈双峰型;平均最大风速的日变化,夜间维持低谷值,15～17时出现峰值。由此可见,研究"立秋"北京的风场气候特点,对于体育比赛运动、改善生活环境和城市建设等具有科学的指导意义。In order to study the variation of wind direction and wind speed during the Beijing 2008 Olympics Games, we divides Beijing city zone into nine districts, utilizing hourly maximum wind direction and wind velocity data samples which automatic weather station continuously monitored in nine districts, separates the wind direction into eight sectors and represents some climate characteristics of eight direction and nine districts in Beijing city zone： 1） north wind frequency increases, south wind frequency decreases in Autumn Begins 2） daily variation of wind frequency of biggest wind velocity present bimodal structure; 3） daily variation of averagely maximum wind velocity maintain the low valley in the nighttime and appear the peak values in 1500-1700 LST. Thus it can be seen that the analysis of climate characteristics of wind field in Autumn Begins in Beijing has a scientific instructional significance in athletics compete, improving the living environment of people and constructing city and so on.

关 键 词：北京 风向 风速 立秋 气候特征 

分 类 号：P425[天文地球—大气科学及气象学]