2020年新冠肺炎疫情管控期江蘇省大氣污染物濃度變化特征

doi:10.12306/2021jms.0097

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2020年新冠肺炎疫情管控期江蘇省大氣污染物濃度變化特征
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                        10.12306/2021jms.0097
                    
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中圖分類號:X513
基金項目:國家自然科學基金青年基金資助項目(41505059);江蘇省PM2.5與臭氧協(xié)同控制重大專項(2019023)

Characteristics of air pollution concentration changes during COVID-19 restriction periods in Jiangsu Province

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利用江蘇省大氣環(huán)境監(jiān)測站點的大氣污染物監(jiān)測數(shù)據(jù),分析了2020年初新冠肺炎疫情管控期間(2—3月)主要大氣污染物濃度的變化特征。結(jié)果顯示,相比于2019、2020年疫情管控期間PM_2.5、PM₁₀、NO₂、SO₂、CO濃度的全省平均降幅分別為37.5%、36.9%、31.9%、28.2%和21.2%。嚴格管控期的2月和生產(chǎn)恢復期的3月,江蘇省十三市PM_2.5、PM₁₀濃度同比降幅大致相當,呈現(xiàn)出較好的時間連續(xù)性和空間均勻性。但各市臭氧濃度同比變化呈現(xiàn)出較大的時空差異。空間上,沿江以南城市南京、無錫、常州、蘇州和鎮(zhèn)江五市臭氧濃度明顯上升,而其他城市臭氧濃度以下降為主;時間上,2月南京等九市臭氧濃度上升,3月徐州等八市臭氧濃度持平或者下降。假設(shè)未發(fā)生新冠肺炎疫情以及未采取為阻斷疫情蔓延而實施的種種舉措,在僅考慮近年來大氣污染防治政策持續(xù)實施的情況下,與預期降幅相比,疫情管控對NO₂實況濃度降幅的影響最大,其次是PM_2.5和PM₁₀。

Abstract:

The characteristics of air pollution concentration changes during COVID-19 restriction periods in 2020(February-March) were investigated based on air monitoring data at surface monitoring stations in Jiangsu Province. Compared with the same period in 2019, the concentrations of PM_2.5, PM₁₀, NO₂, SO₂, CO were reduced by 37.5%, 36.9%, 31.9%, 28.2%, and 21.2%, respectively. In February (the period of lockdown) and March (the period of recovering), PM_2.5, PM₁₀ concentrations in all 13 cities of Jiangsu Province present approximate decreasing, performing well temporal continuity and spatial uniformity, respectively. However, the changes of ozone concentration in different cities performing large spatial and temporal differences. In terms of spatial distribution, Nanjing, Wuxi, Changzhou, Suzhou and Zhenjiang show an obvious increasing of ozone concentration, while the other eight cities mainly present a decreasing trend. In terms of temporal distribution, ozone concentration increase in nine cities in February, but remain flating or decreasing in eight cities in March. Under the assumption that COVID-19 epidemic and restriction do not happen, and only considering the consistent implementation of enforcement regulations on prevention of air pollution, compared with the expected concentration, epidemic control has the greatest impact on the decline of NO₂ concentration, followed by PM_2.5 and PM₁₀.

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楚翠姣,江飛,孫旭光,梁進,蔣益荃,秦艷紅.2020年新冠肺炎疫情管控期江蘇省大氣污染物濃度變化特征.氣象科學,2022,42(1):51-60 CHU Cuijiao, JIANG Fei, SUN Xuguang, LIANG Jin, JIANG Yiquan, QIN Yanhong. Characteristics of air pollution concentration changes during COVID-19 restriction periods in Jiangsu Province. Journal of the Meteorological Sciences,2022,42(1):51-60

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收稿日期:2021-09-25
最后修改日期:2021-11-01
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在線發(fā)布日期: 2022-06-01
出版日期: 2022-05-30

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