我國北方區域沙塵天氣的時間特征分析
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科技部“十五”科技攻關項目課題(2001BA611B-01)資助


Regional Characteristics of Climatic Variability of Dust Storm Frequency in Northern China
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    摘要:

    將我國北方沙塵主要影響區劃分為3個區(西北區、華北區、東北區),用網格面積加權計算區域平均的方法,比較了各區沙塵天氣的時間演化特征。結果表明:西北部沙塵日數的量級明顯多于東北部;沙塵暴的發生有比較明顯的日變化特征,各區白天較夜間更易發生沙塵暴,2區(華北區)和3區(東北區)發生沙塵暴初始時刻的峰值出現在14:00,1區(西北區)出現在15:00~16:00;2區和3區出現沙塵天氣的極值在4月,而1區在4、5兩個月都是極值期;春季是各區沙塵天氣的多發期,1區夏季沙塵天氣發生的頻次也較高;各區的沙塵日數均在2

    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 eve nts 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.

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吳占華,任國玉.我國北方區域沙塵天氣的時間特征分析[J].氣象科技,2007,35(1):96~100

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  • 收稿日期:2005-10-14
  • 定稿日期:2006-01-08
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