| 我国北方区域沙尘天气的时间特征分析 |
| |
| 引用本文： | 吴占华,任国玉.我国北方区域沙尘天气的时间特征分析[J].气象科技,2007,35(1):96-100. |
| |
| 作者姓名： | 吴占华 任国玉 |
| |
| 作者单位： | 1. 山西省朔州市气象局,朔州,036001
2. 中国气象局气候研究开放实验室,国家气候中心,北京,100081 |
| |
| 基金项目： | 科技部十五科技攻关项目课题 |
| |
| 摘 要： | 将我国北方沙尘主要影响区划分为3个区（西北区、华北区、东北区），用网格面积加权计算区域平均的方法，比较了各区沙尘天气的时间演化特征。结果表明：西北部沙尘日数的量级明显多于东北部；沙尘暴的发生有比较明显的日变化特征，各区白天较夜间更易发生沙尘暴，2区（华北区）和3区（东北区）发生沙尘暴初始时刻的峰值出现在14：00，1区（西北区）出现在15：00～16：00；2区和3区出现沙尘天气的极值在4月，而1区在4、5两个月都是极值期；春季是各区沙尘天气的多发期，1区夏季沙尘天气发生的频次也较高；各区的沙尘日数均在20世纪80年代中期前后发生了由多到少的跃变，1区和2区的突变点在1987年，3区在1983年。我国北方3个区沙尘天气的日、月、季节变化有明显的区域特征，其中1区表现得较为独特，2区和3区则比较接近。
|
| 关 键 词： | 沙尘天气 中国北方 区域特征 气候变化 |
| 收稿时间： | 2005/10/14 0:00:00 |
| 修稿时间： | 2005年10月14 |
Regional Characteristics of Climatic Variability of Dust Storm Frequency in Northern China |
| |
| Wu Zhanhua and Ren Guoyu.Regional Characteristics of Climatic Variability of Dust Storm Frequency in Northern China[J].Meteorological Science and Technology,2007,35(1):96-100. |
| |
| Authors: | Wu Zhanhua and Ren Guoyu |
| |
| Institution: | Shuozhou Meteorological Bureau, Shanxi Province, Shuozhou 036001;Lab for Climate Studies, National Climate Center, Beijing 100081 |
| |
| Abstract: | An analysis is made of the climatological and variation characteristics of dust storms over the northern China on the basis of the data from 340 observation stations over the northern China from 1961 to 2003.The affected area of dust events is divided into three sub-regions: Northwest China,North China,and Northeast China and the regional climatic characteristics of dust storm events are analyzed.The number of storm days shows a downward trend for most observation stations in the study area.Dust storms occurs more frequently in the western part of the northern China than in the eastern part,more in spring than in the other parts,more in the daytime than in the nighttime,and most frequently between 14:00 and 16:00 local time.Dust storms occur most frequently between 15:00 and 16:00 for Northwest China and around 14:00 in North China and Northeast China,more frequently in summer in Northwest China as compared to the other regions.There exist significant regional features in the daily,monthly and seasonal changes of dust storms in the northern China,most obviously in Northwest China. |
| |
| Keywords: | dust storms northern China regional characteristic climate change |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《气象科技》浏览原始摘要信息 |
| 点击此处可从《气象科技》下载免费的PDF全文 |
|
