| 川西盆地雾和能见度的气候特征及其对飞行的影响 |
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| 引用本文： | 李子良,傅刚,郝丽萍.川西盆地雾和能见度的气候特征及其对飞行的影响[J].中国海洋大学学报(自然科学版),2007,37(2):191-196. |
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| 作者姓名： | 李子良 傅刚 郝丽萍 |
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| 作者单位： | 1. 中国海洋大学,山东,青岛,266100
2. 成都市气象局,四川,成都,610071 |
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| 基金项目： | 国家高技术研究发展计划(863计划);国家自然科学基金 |
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| 摘 要： | 利用川西盆地广汉机场气象台1986年1月~1995年12月共10 a地面观测资料,对广汉机场低能见度的生消时间、持续时间和能见度的年季节变化及其日变化做了统计分析,研究广汉机场全年能见度的飞行气候特征,特别是低能见度气候特征对飞行的影响。结果表明,能见度日变化特征表现为:白天早、晚时段能见度较低,午后能见度达到最高。能见度的季节变化特征表现为:冬(12,1,2月)、春季(3,4,5月)能见度较低,而夏(6,7,8月)、秋季(9,10,11月)能见度较高。冬季能见度的变化主要受辐射雾影响,夏季能见度的变化主要受降水的影响,随着降水强度的变化而变化,低能见度时间短暂。各标准低能见度逐时频率的日变化特征在各季基本相似,低能见度高频率区均出现在早晨到上午,低频率区均出现在下午。
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| 关 键 词： | 能见度 辐射雾 航空飞行 统计分析 天气现象 |
| 文章编号： | 1672-5174(2007)02-191-06 |
| 修稿时间： | 2006-07-18 |
Climatologic Characteristics of Fog and Visibility in the Sichuan Basin Region |
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| LI Zi-Liang,FU Gang,HAO Li-Ping.Climatologic Characteristics of Fog and Visibility in the Sichuan Basin Region[J].Periodical of Ocean University of China,2007,37(2):191-196. |
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| Authors: | LI Zi-Liang FU Gang HAO Li-Ping |
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| Institution: | 1. Ocean University of China, Qingdao 266003, China; 2. Meteorology Bureau of Chengdu, Chengdu 610071, China |
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| Abstract: | By using the historically observed diurnal hourly meteorological visibility data of Guanghan airport in recent 10 years from 1986 to 1995,the diurnal,seasonal and intra-seasonal variations of the horizontal visibility are investigated.The results show that the visibility of local seasonal climate has great effects on aviation flight.The diurnal variations of visibility show that low visibilities occur in the morning and evening and high visibilities appear in the afternoon.And the seasonal variations of visibility show that low visibilities appear in the spring and winter and high visibilities in the summer and autumn.Fog and haze have a great impact on the visibility variations at the airport in winter.Because a warm air mass is located over a cold air mass frequently providing a large amount of moisture,fog frequently forms in the winter.However,the effect of precipitation determines the characteristics of visibility variations in the summer period,the time duration is very short relative to the winter period. |
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| Keywords: | visibility radiation fog aircraft flight statistic analysis weather phenomenon |
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