Decreasing concentrations of carbonaceous aerosols in China from 2003 to 2013.

Decreasing concentrations of carbonaceous aerosols in China from 2003 to 2013.
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2003年至2013年中国碳质气溶胶浓度下降

DOI:
10.1038/s41598-021-84429-w
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发表时间:
2021-03-05
期刊:
影响因子:
4.6
通讯作者:
Cao J
Cao J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cheng Y;Chow JC;Watson JG;Zhou J;Liu S;Cao J

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2013年冬季和夏季,对中国19个城市的碳质气溶胶进行了表征。将有机碳(OC)和元素碳(EC)水平的测量值与2003年采样的14个相应城市的测量值进行比较,以评估十年来排放变化的影响。 2003年至2013年,冬季和夏季平均OC和EC分别下降了32%和17%,与2006年以来全国范围内实施的排放控制政策相对应。碳减排程度因季节和地点而异。二次有机碳(SOC,49%)的减少量比一次有机碳(POC,25%)更大。冬季PM2.5质量和总碳浓度是夏季的三到四倍,尤其是在燃煤供暖的北方城市。
Carbonaceous aerosols were characterized in 19 Chinese cities during winter and summer of 2013. Measurements of organic carbon (OC) and elemental carbon (EC) levels were compared with those from 14 corresponding cities sampled in 2003 to evaluate effects of emission changes over a decade. Average winter and summer OC and EC decreased by 32% and 17%, respectively, from 2003 to 2013, corresponding to nationwide emission control policies implemented since 2006. The extent of carbon reduction varied by season and by location. Larger reductions were found for secondary organic carbon (SOC, 49%) than primary organic carbon (POC, 25%). PM2.5 mass and total carbon concentrations were three to four times higher during winter than summer especially in the northern cities that use coal combustion for heating.
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