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Trans-Himalayan Transport of Organochlorine Compounds: Three-Year Observations and Model-Based Flux Estimation
Gong, P (Gong, Ping)1,2; Wang, XP (Wang, Xiaoping)1,2,6; Pokhrel, B (Pokhrel, Balram)1,4; Wang, HL (Wang, Hailong)5; Liu, XD (Liu, Xiande)7; Liu, XB (Liu, Xiaobo)1,3; Wania, F (Wania, Frank)8
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
2019
Volume53Issue:12Pages:6773-6783
DOI10.1021/acs.est.9b01223
Abstract

High mountains can trap semivolatile chemicals, such as persistent organic pollutants (POPs), and hinder their dispersion. However, both deep convection and mountain valleys can facilitate POPs' transport over mountains, which have not been investigated before. In this study, a three-year sampling campaign along a south-north altitudinal transect (100-5200m) across the central Himalayas, coupled with a multicompartment contaminant fate model, was conducted for describing the transport processes of POPs. The results show that POPs emitted in the lowlands of the Himalayas can be transported to high altitudes and further to the inner part of the Tibetan Plateau. Modeling suggests that more than 90% of POPs are trapped along the way due to gaseous deposition to soil/foliage and rainfall scavenging; while 2 x 10(-3) to 1 x 10(-1) Giga-grams/year of POPs are transported across the Himalayas. The transport flux along valleys is 2-3 times higher than that across the mountain ridge. However, due to the limited spatial coverage of mountain valleys, the amount of POPs transported through valleys only accounts for a small part of the total transport. This study shows that POPs can overcome the blocking effect of the Himalayas, and high altitude transport across the mountain ridge is the dominant transport pathway.

Subject AreaEnvironmental Sciences & Ecology
WOS IDWOS:000472682900020
Language英语
Indexed BySCI
KeywordPersistent Organic Pollutants Polycyclic Aromatic-hydrocarbons Polybrominated Diphenyl Ethers Long-range Transport Indian Cities Levels Tibetan Plateau Polychlorinated-biphenyls Seasonal-variations Spatial Variation Heavy-metals
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
Cooperation Status国际
ISSN0013-936X
Department环境变化与地表过程重点实验室
URL查看原文
PublisherAMER CHEMICAL SOC
SubtypeArticle
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9262
Collection图书馆
Corresponding AuthorWang, XP (Wang, Xiaoping)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
3.CAS TU, Kathmandu Ctr Res & Educ, Kathmandu 44618, Nepal;
4.Kathmandu Univ, Sch Sci, Dhulikhel 45200, Nepal;
5.PNNL, Atmospher Sci & Global Change Div, Richland, WA 99352 USA;
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
7.Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China;
8.Univ Toronto Scarborough, Dept Phys & Environm Sci, 1265 Mil Trail, Toronto, ON M1C 1A4, Canada.
Recommended Citation
GB/T 7714
Gong, P ,Wang, XP ,Pokhrel, B ,et al. Trans-Himalayan Transport of Organochlorine Compounds: Three-Year Observations and Model-Based Flux Estimation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(12):6773-6783.
APA Gong, P .,Wang, XP .,Pokhrel, B .,Wang, HL .,Liu, XD .,...&Wania, F .(2019).Trans-Himalayan Transport of Organochlorine Compounds: Three-Year Observations and Model-Based Flux Estimation.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(12),6773-6783.
MLA Gong, P ,et al."Trans-Himalayan Transport of Organochlorine Compounds: Three-Year Observations and Model-Based Flux Estimation".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.12(2019):6773-6783.
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