School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China.
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China.
Sci Rep. 2021 Mar 5;11(1):5352. doi: 10.1038/s41598-021-84429-w.
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%). PM 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.
在 2013 年冬季和夏季，对中国 19 个城市的碳质气溶胶进行了特征描述。将有机碳（OC）和元素碳（EC）水平的测量值与 2003 年取自 14 个相应城市的测量值进行了比较，以评估十年来排放变化的影响。与 2006 年以来实施的全国性排放控制政策相对应，2013 年冬季和夏季 OC 和 EC 的平均水平分别下降了 32%和 17%。碳减排的程度因季节和地点而异。与初级有机碳（POC，25%）相比，二次有机碳（SOC，49%）的减排幅度更大。PM 质量和总碳浓度在冬季是夏季的三到四倍，尤其是在使用煤炭取暖的北方城市。
