1980～2012年四川盆地及典型城市的霾日變化特征分析
發(fā)布時間：2018-10-17 20:54
【摘要】：利用1980~2012年川渝地面氣象站資料,采用14:00時法對川渝霾日進行重建,統(tǒng)計分析了川渝霾日的時空分布和長期變化特征.結果表明:1980~2012年川渝霾日集中分布在四川盆地,多發(fā)于冬季、秋末和初春;盆地年平均霾日數為63.5d,主要分布在盆地東北部、中部和南部.1980~1998年盆地的年霾日數呈上升趨勢,之后維持在年平均值附近,近2年略微下降.不同能見度等級霾的分析顯示,輕微霾分布最廣且日數最多,日數逐年來持續(xù)小幅上漲,另外3種霾在2000年之后逐漸減少;輕度霾主要分布在四川盆地南部,而中度霾和重度霾則集中在重慶西南部.典型城市霾日的長期變化趨勢表明,其霾日由冬季霾為主逐漸向春季和秋季擴展;20世紀80年代廣安和綿陽2市的霾日數均呈上升趨勢,90年代則明顯下降,21世紀以來又出現(xiàn)了劇烈上升.樂山、內江威遠、宜賓南溪以及重慶涪陵4市的年霾日數一直呈持續(xù)上升趨勢,宜賓南溪的霾日數由1980年的93d持續(xù)上升至2006年的237d;相比之下,重慶涪陵的年霾日數上升幅度相對較小,但重慶榮昌的霾日數逐年變化較大,其離差系數為涪陵的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.
【作者單位】： 四川省氣象臺;高原與盆地暴雨旱澇災害四川省重點實驗室;四川省氣象局;
【基金】：國家科技支撐計劃項目(2014BAC16B00) 四川省氣象臺精細化預報創(chuàng)新團隊
【分類號】：X513
本文編號：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.
【作者單位】： 四川省氣象臺;高原與盆地暴雨旱澇災害四川省重點實驗室;四川省氣象局;
【基金】：國家科技支撐計劃項目(2014BAC16B00) 四川省氣象臺精細化預報創(chuàng)新團隊
【分類號】：X513
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1 劉子輝;黃軍;滕業(yè)龍;蔣立強;;典型城市的重要生態(tài)功能區(qū)保護研究[J];綠色科技;2012年08期
，本文編號：2277941
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