基于气象条件对兰州国际马拉松赛举办日期选择的分析

通过兰州市各月天气气候特点的统计分析，对马拉松比赛要求的各种气象要素条件（气温、风速、相对湿度等）进行对比，综合考虑2012年全国马拉松赛程安排，首先选定了6月3个日期段以及07：00—13：00时段作为兰州市举办马拉松比赛的适宜日期和时间段；然后，根据这3个日期段07：00～13-00时段的最低相对湿度和气温的分布，最后选择了6月10～15日为最佳比赛日期，为兰州市委、市政府确定最终比赛日期提供了重要的决策依据。

The Date Selection of Lanzhou International Marathon Race Based on Meteorological Condition

For organizing a perfect international marathon race in Lanzhou in 2012, the suitable weather conditions were firstly defined on the basis of the previous researches and the game held in China in 2010. Then, the overall consideration was made about the weath- er requirements and the schedule arrangement as well as the weather and climate characteristics of Lanzhou in order to select the date of the international marathon race in 2012 in Lanzhou, which described as follows. Firstly, June was selected as the perfect month via comparison with the suitable weather conditions for marathon race and the monthly variation characteristic of temperature, relative hu- midity and wind velocity during 1981 - 2010 at weather station of Lanzhou. Then, three periods including 2 to 6, 10 to 15 and 21 to 25 of June were chosen preliminarily by means of weather background analysis in June during 2004 - 2011, and meanwhile, the time peri- od of 07：00 -13：00 was selected as the best suitable time for marathon race, at which the unfavorable influence of weather on race such as the thunder and lightning and the strong wind could be avoided. At last, according to the distribution of the relative humidity and temperature from 07：00 to 13：00 during the three selected date periods, the international marathon race in 2012 in Lanzhou was scheduled on JunelO to 15.