蘇州灰霾特征分析

doi:10.3969/2012jms.0066

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蘇州灰霾特征分析
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                        10.3969/2012jms.0066
                    
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基金項(xiàng)目:公益性行業(yè)科研專項(xiàng)(GYHY201206011);國(guó)家自然科學(xué)基金青年基金(40905004);蘇州市氣象局重點(diǎn)支持項(xiàng)目(SZ200901)

Characteristics of haze in Suzhou

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利用蘇州市2009年6月—2010年5月逐時(shí)的能見(jiàn)度、相對(duì)濕度、污染物(PM₁₀、PM_2.5、黑碳)濃度和散射系數(shù)等資料進(jìn)行灰霾的判識(shí)與統(tǒng)計(jì)分析,結(jié)果表明:蘇州市灰霾日占全年天數(shù)的46.6%,雨日和"藍(lán)天"分別占33.2%和21.9%。在蘇州所有灰霾日中以輕微灰霾為主,占灰霾日總數(shù)的70.6%,發(fā)生中度和重度灰霾的頻率較小?；姻渤霈F(xiàn)頻率的日變化規(guī)律表明白天出現(xiàn)灰霾的頻率比夜間低,在5—8時(shí)灰霾出現(xiàn)的頻率達(dá)到峰值,14—16時(shí)灰霾出現(xiàn)的頻率最低?；姻踩盏奈廴疚餄舛冗h(yuǎn)大于非灰霾日,隨著灰霾等級(jí)增大,黑碳濃度明顯增大;除重度灰霾外, PM₁₀和PM_2.5濃度也明顯增大;散射系數(shù)增大。

Abstract:

Characteristics of haze in Suzhou were analyzed using data of the hourly visibility, relative humidity, concentration of pollutants (including PM₁₀, PM_2.5, BC(black carbon))and scattering coefficient from June 2009 to May 2010. The result showed that the total haze days accounted for 46.6 percent of the whole year days; rainy and blue days accounted for 33.2 percent and 21.9 percent respectively. Among all haze days, slight haze weather accounted for 70.6 percent of the total haze days, occurred the most frequently, while moderate and serious haze weather occurred rarely. Haze exhibited a significant diurnal variations, which occurred less often in the daytime than in the nighttime, the largest frequency of haze appeared at 5-8 a.m, and the least appeared at 14-16 p.m. Compared with non-haze days, the concentration of pollutants was higher in haze days. With the level of haze increased, the concentration of black carbon increased obviously; except serious haze days, the concentration of PM₁₀, PM_2.5 also increased, as well as the scattering coefficient.

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鄭秋萍,劉紅年,唐麗娟,朱焱,朱蓮芳,蔣維楣.蘇州灰霾特征分析.氣象科學(xué),2013,33(1):83-88 ZHENG Qiuping, LIU Hongnian, TANG Lijuan, ZHU Yan, ZHU Lianfang, JIANG Weimei. Characteristics of haze in Suzhou. Journal of the Meteorological Sciences,2013,33(1):83-88

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收稿日期:2011-08-04
最后修改日期:2011-11-14
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在線發(fā)布日期: 2013-03-06
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