气候变化领域集成服务门户(CCPortal): Long-term trends and drivers of aerosol pH in eastern China

CCPortal

DOI	10.5194/acp-22-13833-2022
	Long-term trends and drivers of aerosol pH in eastern China
	Zhou, Min; Zheng, Guangjie; Wang, Hongli; Qiao, Liping; Zhu, Shuhui; Huang, DanDan; An, Jingyu; Lou, Shengrong; Tao, Shikang; Wang, Qian; Yan, Rusha; Ma, Yingge; Chen, Changhong; Cheng, Yafang; Su, Hang; Huang, Cheng
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13833
结束页码	13844
卷号	22 期号:20 页码:12
英文摘要	Aerosol acidity plays a key role in regulating the chemistry and toxicity of atmospheric aerosol particles. The trend of aerosol pH and its drivers is crucial in understanding the multiphase formation pathways of aerosols. Here, we reported the first trend analysis of aerosol pH from 2011 to 2019 in eastern China, calculated with the ISORROPIA model based on observed gas and aerosol compositions. The implementation of the Air Pollution Prevention and Control Action Plan led to -35.8 %, -37.6 %, -9.6 %, -81.0 % and 1.2 % changes of PM2.5, SO42-, NHx, non-volatile cations (NVCs) and NO3- in the Yangtze River Delta (YRD) region during this period. Different from the drastic changes of aerosol compositions due to the implementation of the Air Pollution Prevention and Control Action Plan, aerosol pH showed a minor change of -0.24 over the 9 years. Besides the multiphase buffer effect, the opposite effects from the changes of SO42- and non-volatile cations played key roles in determining this minor pH trend, contributing to a change of +0.38 and -0.35, respectively. Seasonal variations in aerosol pH were mainly driven by the temperature, while the diurnal variations were driven by both temperature and relative humidity. In the future, SO2, NOx and NH3 emissions are expected to be further reduced by 86.9 %, 74.9 % and 41.7 % in 2050 according to the best health effect pollution control scenario (SSP1-26-BHE). The corresponding aerosol pH in eastern China is estimated to increase by similar to 0.19, resulting in 0.04 less NO3- and 0.12 less NH4+ partitioning ratios, which suggests that NH3 and NOx emission controls are effective in mitigating haze pollution in eastern China.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000876041400001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273607
作者单位	Nanjing University; Max Planck Society; Max Planck Society
推荐引用方式 GB/T 7714	Zhou, Min,Zheng, Guangjie,Wang, Hongli,et al. Long-term trends and drivers of aerosol pH in eastern China[J],2022,22(20):12.
APA	Zhou, Min.,Zheng, Guangjie.,Wang, Hongli.,Qiao, Liping.,Zhu, Shuhui.,...&Huang, Cheng.(2022).Long-term trends and drivers of aerosol pH in eastern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(20),12.
MLA	Zhou, Min,et al."Long-term trends and drivers of aerosol pH in eastern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.20(2022):12.