摘要
利用中国137个站点1956～2001年46年的浓雾发生频数资料,结合地理信息系统分析作图软件,统计和分析了我国浓雾频数的多年空间分布、年代际变化及各区域浓雾频数变化特征,并作出了雾频数与时间序列相关图。结果表明:我国浓雾频数最多的区域集中在东南沿海、四川盆地等,而浓雾频数最少的区域集中在西北、青藏高原及内蒙;我国浓雾频数从1956年开始基本呈现"两头波谷中间波峰"的时间变化趋势;全国大部分地区雾频数与时间序列的相关系数绝对值小于0.3,且相关系数为负的地区明显多于为正的地区,除了华北平原雾频数整体上增加外,其它地区基本上呈减少趋势或者变化不大。
Using the thick fog frequency data in 137 station sites for 46 years from 1956 to 2001, and on the basis of Geographic Information System mapping software, this paper runs statistical analysis of the spatial distribution of thick fog frequency, interdecadal variability and regional variability characteristics, and makes time series-related figures of fog frequency. Results have the following findings. Fog concentrated the most in southeast coastal regions and Sichuan Basin but the least in northwest region, the Qinghai-Tibet Plateau and Inner Mongolia. Fog frequency shows a pattern of two valleys at the beginning and ending of the 46-year period, and a wave trough in intermediate time series. The absolute value of fog frequency correlation coefficient is less than 0.3 in most parts of the country while the region of negative correlation coefficient is significantly more than the one of positive correlation coefficient. In addition, the fog frequency in most regions is generally decreased or little changed from 1956 to 2001, except in North China Plain.
出处
《热带气象学报》
CSCD
北大核心
2008年第5期497-501,共5页
Journal of Tropical Meteorology
基金
公益性行业(气象)科研专项(GYHY200706026)
江苏省自然科学基金(BK2007227)共同资助
关键词
雾频数
空间分布
年代际变化
相关系数
fog frequency
spatial distribution
interdecadal variability
correlation coefficient
