未来全球PM<sub>2.5</sub>浓度时空变化特征的模拟

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Abstract

According to the emission scenarios of aerosols and their precursors, RCP2.6 (low emission), RCP4.5 (medium emission) and RCP8.5 (high emission) scenarios given by the Fifth Assessment Report of Intergovernmental Panel on Climate Change (IPCC AR5), the temporal and spatial variations of the concentrations of total PM_2.5 (the sum of anthropogenic and natural aerosols), anthropogenic and natural aerosols in PM_2.5 over the globe from 2010 to 2030 and 2030 to 2050, as well as the contributions of anthropogenic and natural aerosols to these variations under the green emission scenario (RCP4.5) over China were simulated in this work, using an aerosol-climate online coupled model from National Climate Center. Results show that from 2010 to 2030, the spatial variations of the column concentrations of PM_2.5 under the three emission scenarios were basically similar to each other. The column concentrations of PM_2.5 increase over Europe, North Africa, and the ocean to the west of North Africa, but the increase over North Africa and the ocean to the west of it was more significant than that over Europe. However, the column concentrations of PM_2.5 decrease over the Arabian peninsula. The annual mean surface concentrations of PM_2.5 over China decreased approximately by 2.55μg/m³, with the anthropogenic aerosols accounting for about 28% and the natural aerosols accounting for about 72% under RCP4.5 scenario. From 2030 to 2050, the spatial variations of the column concentrations of PM_2.5 differred greatly under the three different emission scenarios. The column concentrations of PM_2.5 increased apparently over North Africa and ocean to the west of it, while decreased over East Asia under both RCP4.5 and RCP8.5 scenarios. Whereas, the results under RCP2.6 scenario were quite different from RCP4.5 and RCP8.5 scenarios. In China, the column concentrations of PM_2.5, as well as the anthropogenic and natural aerosols in PM_2.5, were reduced further than the previous period under RCP4.5 scenario, with the contributions (about 34%) of anthropogenic aerosols increasing.

Key words： PM_2.5 anthropogenic aerosol natural aerosol BCC_AGCM2.0_CUACE/Aero

Received: 20 July 2016

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X513

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	Articles by authors
	YANG Dong-dong
	ZHAO Shu-yun
	ZHANG Hua
	SHEN Xin-yong

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YANG Dong-dong,ZHAO Shu-yun,ZHANG Hua等. Simulation of global distribution of temporal and spatial variation of PM_2.5 concentration in the future[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(4): 1201-1212.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I4/1201

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