| 虹桥机场能见度变化特征分析 |
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| 引用本文： | 沈俊,阎凤霞,王燕雄.虹桥机场能见度变化特征分析[J].热带气象学报,2008,24(1):99-104. |
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| 作者姓名： | 沈俊 阎凤霞 王燕雄 |
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| 作者单位： | 李帅（北京大学物理学院大气科学系,北京,100871;黑龙江省气象局,黑龙江,哈尔滨,150001）;陈莉（哈尔滨市气象局,黑龙江,哈尔滨,150080;北京师范大学地理学与遥感科学学院,北京,100875）;任玉玉（北京师范大学地理学与遥感科学学院,北京,100875） |
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| 基金项目： | 中国气象局气候变化专项项目
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黑龙江省气象局重点科研项目 |
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| 摘 要： | 以中国1960年前建站的595个气象台站1951/1952～2004/2005年冬季逐日降水资料为基础,采用面积加权平均法得到冬季全国和8个区(包括东北区、华北区、长江中下游、华南区、青藏高原、西南区、西北东部和西北西部)的平均降水日数距平与降水量标准化距平序列.通过对全国和区域平均距平序列以及全国各站的冬季降水日数和降水量的变化速率和趋势系数的分析,得出:近54年来中国冬季降水日数明显减少,降水量变化趋势不明显;东北区和西北东部的冬季降水日数减少趋势超过0.01显著性水平,而青藏高原降水量的增加趋势超过0.05显著性水平.
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| 关 键 词： | 冬季 降水日数 降水量 变化特征 |
| 文章编号： | 1004-4965(2008)01-0094-05 |
| 修稿时间： | 2006年10月13 |
ANALYSIS OF CHARACTERISTICS OF VISIBILITY VARIATION IN HONGQIAO AIRPORT |
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| SHEN Jun,YAN Feng-xia and WANG Yan-xiong.ANALYSIS OF CHARACTERISTICS OF VISIBILITY VARIATION IN HONGQIAO AIRPORT[J].Journal of Tropical Meteorology,2008,24(1):99-104. |
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| Authors: | SHEN Jun YAN Feng-xia and WANG Yan-xiong |
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| Institution: | Department of atmospheric science, school of physics, Peiking University, Beijng 100871, China;Meteorological center of air traffic management bureau of East China, Shanghai 200335, China;Meteorological center of air traffic management bureau of East China, Shanghai 200335, China;Meteorological center of air traffic management bureau of East China, Shanghai 200335, China |
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| Abstract: | The annual,seasonal and daily variation of visibility was analyzed for Honqiao Airport from 1987 to 2004.Results showed that it decreased annually,and showed evident seasonal variation characteristics that visibility was the best in summer but worst in winter and low visibility mostly appeared in winter.The happening frequency of low visibility in Hongqiao Airport below aircraft landing standard decreased form 1987 to 2004.The best period in a day for airplane landing in Hongqiao airport is from 13:00 to 18:00(local time),while the worst is form 4:00 to 8:00.By wavelet transform analysis,it is found that visibility of Hongqiao Airport varies most significantly at annual and synoptic scales,and biweekly oscillation of 10-20-day period is also significant in summer.Visibility is the best in July and August but worst in January,with the turning point appearing at the end of spring to early summer,and the end of autumn to early winter.Visibility of Hongqiao Airport is closely correlated with fog hours and particles,and the variation between them is significantly negative. |
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| Keywords: | visibility wavelet analysis correlation analysis Hongqiao Airport |
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