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DOI	10.5194/acp-18-12859-2018
	Concentration, temporal variation, and sources of black carbon in the Mt. Everest region retrieved by real-time observation and simulation
	Chen, Xintong; Kang, Shichang; Cong, Zhiyuan; Yang, Junhua; Ma, Yaoming
通讯作者	Kang, SC (通讯作者)
发表日期	2018
ISSN	1680-7316
EISSN	1680-7324
起始页码	12859
结束页码	12875
卷号	18 期号:17
英文摘要	Based on the high-resolution measurement of black carbon (BC) at the Qomolangma (Mt. Everest) Station (QOMS, 28.36 degrees N, 86.95 degrees E, 4276 m a.s.l.) from 15 May 2015 to 31 May 2017, we investigated the seasonal and diurnal variations in BC and its potential source regions. Both monthly and daily mean BC concentrations reached the highest values in the pre-monsoon season and the lowest values in the monsoon season. The highest monthly and daily mean BC concentrations were at least 1 order of magnitude higher than the lowest concentrations. For the diurnal variation, the BC concentrations remained significantly high from late at night to morning in the pre-monsoon season. Meanwhile, the westerly winds prevailed during this period, implying the potential for pollutants to be transported across the Himalayas from long-distance sources to QOMS along the valley. In the monsoon season, the BC concentrations remained low but peaked in the morning and at noon, which might be caused by local emissions from cooking. By analyzing the simulation results from the backward trajectories of air masses and the fire spot distribution from the MODIS data, we found that the seasonal cycle of BC was significantly influenced by the atmospheric circulation and combustion intensity in the Mt. Everest region. The transport mechanisms of BC were further revealed using a WRF-Chem simulation during severe pollution episodes. For the pollution event in the monsoon season, BC aerosols in southern Asia were uplifted and transported to the Mt. Everest region by the southerly winds in the upper atmosphere. However, for the events in the pre-monsoon season, BC from northern India was transported and concentrated on the southern slope of the Himalayas by the northwesterly winds in the lower atmosphere and then transported across the Himalayas by the mountain-valley wind. A relatively smaller amount of BC from northwestern India and central Asia was transported to the Mt. Everest region by the westerly winds in the upper atmosphere.
关键词	LIGHT-ABSORBING IMPURITIES TIBETAN PLATEAU CONCENTRATIONS AEROSOL OPTICAL-PROPERTIES PARTICLE SOOT PHOTOMETER ATMOSPHERIC BROWN CLOUDS INDO-GANGETIC PLAINS HIGH-ALTITUDE SITE AETHALOMETER DATA MASS CONCENTRATION AIR-QUALITY
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000443861100005
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259142
推荐引用方式 GB/T 7714	Chen, Xintong,Kang, Shichang,Cong, Zhiyuan,et al. Concentration, temporal variation, and sources of black carbon in the Mt. Everest region retrieved by real-time observation and simulation[J]. 中国科学院青藏高原研究所,2018,18(17).
APA	Chen, Xintong,Kang, Shichang,Cong, Zhiyuan,Yang, Junhua,&Ma, Yaoming.(2018).Concentration, temporal variation, and sources of black carbon in the Mt. Everest region retrieved by real-time observation and simulation.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(17).
MLA	Chen, Xintong,et al."Concentration, temporal variation, and sources of black carbon in the Mt. Everest region retrieved by real-time observation and simulation".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.17(2018).