关键词: 崇礼县, 雪季, 连续无降雪时段, 冬奥会赛期, 降雪特征

Abstract:

Characteristics of snow season and snowfall during the period of Olympic Winter Games were analyzed by using the datasets of daily precipitation and weather phenomena from 1960 to 2014 at Chongli of Zhangjiakou. The paper reveals that the earliest beginning snowfall date is October 13, the latest ending snowfall date is April 30, mean beginning snowfall date for years is November 2 and mean ending snowfall date for years is April 6; the longest snow season is 190 days, while the shortest one is 123 days, mean length of snow season for years is 156 days. Maximum spells without snowfall in snow seasons mostly concentrate in late December to late January. Before February 4?20, which is planned for the Olympic Winter Games in 2022, more snowfall amounts but less snowfall days occurred in early November; while the difference in snowfall amounts and snowfall days are little in other ten-day periods. In February 4?20, snowfall occurs once every 4?5 days on average, most of which are light snow and moderate snow, the probability of heavy snow is low. These results can provide reference for making full advantage of snow resources, competition schedules planning and weather prediction during the Olympic Winter Games.

Key words: Chongli county, snow season, maximum spells without snowfall, the period planned for Olympic Winter Games, snowfall characteristics