Elemental composition of aerosol in the Nam Co region, Tibetan Plateau, during summer monsoon season

Cong, Zhiyuan; Kang, Shichang; Liu, Xiande; Wang, Guangfu

doi:10.1016/j.atmosenv.2006.09.046

Cited by 149 publications

(80 citation statements)

References 30 publications

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“…The field sampling was similar to that described in Cong et al (2007). In brief, the sampler was placed on the flat roof (4 m above ground) of the monitoring house at the Nam Co station with a vacuum pump operating at an average flow rate of 16.7 L min -1 (Fig.…”

Section: Field Sampling Methodsmentioning

confidence: 99%

“…The elemental compositions of precipitation (Cong et al, 2010), aerosols (Cong et al, 2007;Li et al, 2007b), and snow Yu et al, 2013) have indicated the presence of long-range transported pollutants in the Nam Co region (Xia et al, 2011;Lüthi et al, 2015), with partial contributions from local emissions (Li et al, 2007a;Zhang et al, 2012b;Chen et al, 2015). However, the temporal coverage of previous researches were short, with most studies focusing on only one season, and elemental deposition data for this region, which is essential for studying aquatic bioavailability and historical variation (Hsu et al, 2005;Kocak et al, 2005), is limited.…”

Section: Introductionmentioning

confidence: 99%

“…Most aerosol chemistry investigations in the TP were short-term and conducted at the edge of the plateau (e.g., Wen et al, 2001;Cong et al, 2007;Meng et al, 2013;Zhao et al, 2013) and Lhasa, the capital city of the Tibet Autonomous Region of China (Zhang et al, 2000;Cong et al, 2011). Therefore, considering the vast area of the TP and the very limited data available for the region, more investigations are required to understand the aerosol chemical composition over the TP, particularly in the remote and inland TP.…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric Aerosol Elements over the Inland Tibetan Plateau: Concentration, Seasonality, and Transport

Ghimire

2015

Aerosol Air Qual. Res.

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Between November 2005 and November 2007, weekly total suspended particle samples were collected at the Nam Co station in the inland Tibetan Plateau (TP). Through inductively coupled plasma mass spectrometry, twenty-nine elements were analyzed and their sources and fluxes were investigated. Mean elemental concentrations were lower than those at the edge of the TP. Some elements, such as Cr, Ni, Cd, and Pb, exhibited high enrichment factors (Cr: 22; Ni: 17; Cd: 23; and Pb: 9), indicating possible anthropogenic influence in this remote region, particularly during the pre-monsoon and monsoon seasons. In addition, an empirical orthogonal function analysis revealed the dominance of crustal-origin elements, rather than anthropogenic elements, in the aerosol. Furthermore, backward air mass trajectories demonstrated that the Nam Co region was mainly influenced by air masses from Central and South Asia. Accordingly, because of dust storms from Central Asia and within the TP, crustal element concentrations, such as of Al, were higher during winter and pre-monsoon seasons than during the monsoon season. By contrast, anthropogenic elements, such as Cr and Cd, were relatively higher during the pre-monsoon and monsoon seasons because of pollutants transported from South Asia, where atmospheric brown clouds are concentrated and biomass combustion is prevalent. Dry deposition of aerosols dominated in the Nam Co region, particularly during the non-monsoon period, which is useful to interpret the elemental records in the TP ice cores and lake sediments.

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Section: Field Sampling Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Atmospheric Aerosol Elements over the Inland Tibetan Plateau: Concentration, Seasonality, and Transport

Ghimire

2015

Aerosol Air Qual. Res.

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“…The backward air mass trajectory analysis suggested that dust storm containing particulate Hg originated in Iran and Afghanistan and finally reached Mount Nyainqentanglha in the Tibetan Plateau after traveling over thousands of kilometers (Loewen et al, 2007). Some trace metals (Cr, Ni, Cu, Zn, As) in aerosols from the Nam Co region, which is located in central Tibet and covering an area of 1980 km 2 at an elevation of 4718 m, might be from South Asia over the long range atmospheric transport (Cong et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Mercury in alpine fish from four rivers in the Tibetan Plateau

Shao

Shi

et al. 2016

Journal of Environmental Sciences

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“…These results are consistent with those reported in the literature (Allengil and Martynov 1995;Amundsen et al 1997;Papagiannis et al 2004). Previous studies revealed that both the winter monsoon (westerly jet stream) and Asian summer monsoon (easterly jet stream) transport a significant load of metal-associated aerosols (Cong et al 2007;Li et al 2008). Therefore, the regional distribution of trace elements on the plateau is possibly a reflection of the latitude or longitude of the sampling sites.…”

Section: Metal Concentrations In Fish Musclesmentioning

confidence: 99%

Bioaccumulation and regional distribution of trace metals in fish of the Tibetan Plateau

Yang

Zhang

Wang

2013

Environ Geochem Health

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There are limited data on trace metals in the fishes of the Tibetan Plateau. In this study, 62 fish samples were collected from six alpine lakes and a river to investigate the levels and spatial variations of trace metals across the Tibetan Plateau. The concentrations of nine trace elements in fish samples were measured using an inductively coupled plasma mass spectrometer after microwave digestion. Results showed the metal concentrations in the fish muscles had the following ranges: Cr 0.09-0.74 mg/kg, Mn 0.38-4.49 mg/kg, Ni 0.06-0.91 mg/kg, Cu 1.00-32.2 mg/kg, Zn 13.1-102.5 mg/kg, As 0.12-3.10 mg/kg, Pb 0.46-3.22 mg/kg, Ba 0.60-4.93 mg/kg, and Se 0.77-9.38 mg/kg on a dry weight basis, respectively. All the lake-averaged metal concentrations in the fish muscle were below the maximum permissible levels set by the Chinese food health criterion (GB2762-2012). The results were analyzed by multivariate statistical techniques to identify the major factors explaining the variance of metal concentrations in the alpine lakes. This work provides baseline data on metal pollution in common fish species of the Tibetan Plateau, contributing to the effective evaluation of both the environmental quality and health status of organisms in the aquatic ecosystem.

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Elemental composition of aerosol in the Nam Co region, Tibetan Plateau, during summer monsoon season

Cited by 149 publications

References 30 publications

Atmospheric Aerosol Elements over the Inland Tibetan Plateau: Concentration, Seasonality, and Transport

Atmospheric Aerosol Elements over the Inland Tibetan Plateau: Concentration, Seasonality, and Transport

Mercury in alpine fish from four rivers in the Tibetan Plateau

Bioaccumulation and regional distribution of trace metals in fish of the Tibetan Plateau

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