气候变化领域集成服务门户(CCPortal): Carbonaceous aerosol characteristics on the Third Pole: A primary study based on the Atmospheric Pollution and Cryospheric Change (APCC) network

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DOI	10.1016/j.envpol.2019.06.112
	Carbonaceous aerosol characteristics on the Third Pole: A primary study based on the Atmospheric Pollution and Cryospheric Change (APCC) network
	Chen, Pengfei; Kang, Shichang; Li, Chaoliu; Zhang, Qianggong; Guo, Junming; Tripathee, Lekhendra; Zhang, Yuian; Li, Gang; Gul, Chaman; Cong, Zhiyuan; Wan, Xin; Niu, Hewen; Panday, Arnico K.; Rupakheti, Maheswar; Ji, Zhenming
发表日期	2019
ISSN	0269-7491
EISSN	1873-6424
卷号	253
英文摘要	Carbonaceous aerosols (CAs) scatter and absorb incident solar radiation in the atmosphere, thereby influencing the regional climate and hydrological cycle, particularly in the Third Pole (TP). Here, we present the characteristics of CAs at 19 observation stations from the Atmospheric Pollution and Cryospheric Change network to obtain a deep understanding of pollutant status in the TP. The organic carbon (OC) and elemental carbon (EC) concentrations decreased noticeably inwards from outside to inland of the TP, consistent with their emission load and also affected by transport process and meteorological condition. Urban areas, such as Kathmandu, Karachi, and Mardan, exhibited extremely high OC and EC concentrations, with low and high values occurring in the monsoon and non-monsoon seasons, respectively. However, remote regions inland the TP (e.g., Nam Co and Ngari) demonstrated much lower OC and EC concentrations. Different seasonal variations were observed between the southern and northern parts of the TP, suggesting differences in the patterns of pollutant sources and in distance from the sources between the two regions. In addition to the influence of long-range transported pollutants from the Indo-Gangetic Plain (IGP), the TP was affected by local emissions (e.g., biomass burning). The OC/EC ratio also suggested that biomass burning was prevalent in the center TP, whereas the marginal sites (e.g., Jomsom, Dhunche, and Laohugou) were affected by fossil fuel combustion from the up-wind regions. The mass absorption cross-section of EC (MAC(EC)) at 632 nm ranged from 6.56 to 14.7 m(2) g(-1), with an increasing trend from outside to inland of the TP. Urban areas had low MAC(EC) values because such regions were mainly affected by local fresh emissions. In addition, large amount of brown carbon can decrease the MAC(EC) values in cities of South Asia. Remote sites had high MAC(EC) values because of the coating enhancement of aerosols. Influenced by emission, transport process, and weather condition, the CA concentrations and MAC(EC )presented decreasing and increasing trends, respectively, from outside to inland of the TP. (C) 2019 Elsevier Ltd. All rights reserved.
关键词	Elemental carbon Organic carbon Long-range transport Light absorption Himalayas Tibetan plateau
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112017
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, DongGangXi Rd, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Chen, Pengfei,Kang, Shichang,Li, Chaoliu,et al. Carbonaceous aerosol characteristics on the Third Pole: A primary study based on the Atmospheric Pollution and Cryospheric Change (APCC) network[J]. 中国科学院西北生态环境资源研究院,2019,253.
APA	Chen, Pengfei.,Kang, Shichang.,Li, Chaoliu.,Zhang, Qianggong.,Guo, Junming.,...&Ji, Zhenming.(2019).Carbonaceous aerosol characteristics on the Third Pole: A primary study based on the Atmospheric Pollution and Cryospheric Change (APCC) network.ENVIRONMENTAL POLLUTION,253.
MLA	Chen, Pengfei,et al."Carbonaceous aerosol characteristics on the Third Pole: A primary study based on the Atmospheric Pollution and Cryospheric Change (APCC) network".ENVIRONMENTAL POLLUTION 253(2019).