1980～2012年四川盆地及典型城市的霾日变化特征分析
发布时间：2018-10-17 20:54
【摘要】：利用1980~2012年川渝地面气象站资料,采用14:00时法对川渝霾日进行重建,统计分析了川渝霾日的时空分布和长期变化特征.结果表明:1980~2012年川渝霾日集中分布在四川盆地,多发于冬季、秋末和初春;盆地年平均霾日数为63.5d,主要分布在盆地东北部、中部和南部.1980~1998年盆地的年霾日数呈上升趋势,之后维持在年平均值附近,近2年略微下降.不同能见度等级霾的分析显示,轻微霾分布最广且日数最多,日数逐年来持续小幅上涨,另外3种霾在2000年之后逐渐减少;轻度霾主要分布在四川盆地南部,而中度霾和重度霾则集中在重庆西南部.典型城市霾日的长期变化趋势表明,其霾日由冬季霾为主逐渐向春季和秋季扩展;20世纪80年代广安和绵阳2市的霾日数均呈上升趋势,90年代则明显下降,21世纪以来又出现了剧烈上升.乐山、内江威远、宜宾南溪以及重庆涪陵4市的年霾日数一直呈持续上升趋势,宜宾南溪的霾日数由1980年的93d持续上升至2006年的237d;相比之下,重庆涪陵的年霾日数上升幅度相对较小,但重庆荣昌的霾日数逐年变化较大,其离差系数为涪陵的2倍.
[Abstract]:Based on the data of Sichuan and Chongqing surface meteorological stations from 1980 to 2012, the smog days of Sichuan and Chongqing were reconstructed by 14:00 method, and the temporal and spatial distribution and long-term variation characteristics of smog days in Sichuan and Chongqing were statistically analyzed. The results show that the haze days of Sichuan and Chongqing are concentrated in Sichuan Basin from 1980 to 2012, mostly in winter, late autumn and early spring, and the average annual haze days in the basin are 63.5 days, mainly in the northeast, central and southern part of the basin. The annual haze days in the basin from 1980 to 1998 show an upward trend. After that, it remained close to the annual average and declined slightly in the last two years. The analysis of haze of different visibility levels shows that slight haze is the most widely distributed and has the largest number of days, and the number of days has been increasing slightly year by year, and the other three haze have gradually decreased after 2000; the light haze is mainly distributed in the south of Sichuan Basin. Moderate haze and heavy haze are concentrated in southwestern Chongqing. The long-term trend of haze days in typical cities shows that The haze days gradually extended from winter to spring and autumn, and the number of haze days in Guangan and Mianyang in 1980's both showed an upward trend, decreased obviously in 1990s, and increased sharply since the 21st century. The annual haze days of Leshan, Neijiang Weiyuan, Yibin Nanxi and Chongqing Fuling have been on the rise, and the number of smog days in Yibin Nanxi has been rising from 93 days in 1980 to 237 days in 2006. The annual haze days in Fuling of Chongqing were relatively small, but the number of haze days in Rongchang of Chongqing changed greatly year by year, and the coefficient of deviation was 2 times of that of Fuling.
【作者单位】： 四川省气象台;高原与盆地暴雨旱涝灾害四川省重点实验室;四川省气象局;
【基金】：国家科技支撑计划项目(2014BAC16B00) 四川省气象台精细化预报创新团队
【分类号】：X513
本文编号：2277941
[Abstract]:Based on the data of Sichuan and Chongqing surface meteorological stations from 1980 to 2012, the smog days of Sichuan and Chongqing were reconstructed by 14:00 method, and the temporal and spatial distribution and long-term variation characteristics of smog days in Sichuan and Chongqing were statistically analyzed. The results show that the haze days of Sichuan and Chongqing are concentrated in Sichuan Basin from 1980 to 2012, mostly in winter, late autumn and early spring, and the average annual haze days in the basin are 63.5 days, mainly in the northeast, central and southern part of the basin. The annual haze days in the basin from 1980 to 1998 show an upward trend. After that, it remained close to the annual average and declined slightly in the last two years. The analysis of haze of different visibility levels shows that slight haze is the most widely distributed and has the largest number of days, and the number of days has been increasing slightly year by year, and the other three haze have gradually decreased after 2000; the light haze is mainly distributed in the south of Sichuan Basin. Moderate haze and heavy haze are concentrated in southwestern Chongqing. The long-term trend of haze days in typical cities shows that The haze days gradually extended from winter to spring and autumn, and the number of haze days in Guangan and Mianyang in 1980's both showed an upward trend, decreased obviously in 1990s, and increased sharply since the 21st century. The annual haze days of Leshan, Neijiang Weiyuan, Yibin Nanxi and Chongqing Fuling have been on the rise, and the number of smog days in Yibin Nanxi has been rising from 93 days in 1980 to 237 days in 2006. The annual haze days in Fuling of Chongqing were relatively small, but the number of haze days in Rongchang of Chongqing changed greatly year by year, and the coefficient of deviation was 2 times of that of Fuling.
【作者单位】： 四川省气象台;高原与盆地暴雨旱涝灾害四川省重点实验室;四川省气象局;
【基金】：国家科技支撑计划项目(2014BAC16B00) 四川省气象台精细化预报创新团队
【分类号】：X513
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1 刘子辉;黄军;滕业龙;蒋立强;;典型城市的重要生态功能区保护研究[J];绿色科技;2012年08期
，本文编号：2277941
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