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Water-Soluble Brown Carbon in Atmospheric Aerosols from Godavari (Nepal), a Regional Representative of South Asia
Wu, GM (Wu, Guangming1; Ram, K (Ram, Kirpa)1,2; Fu, PQ (Fu, Pingqing)3; Wang, W (Wang, Wan)4; Zhang, YL (Zhang, Yanlin)5; Liu, XY (Liu, Xiaoyan)5; Stone, EA (Stone, Elizabeth A.)6; Pradhan, BB (Pradhan, Bidya Banmali)7; Dangol, PM (Dangol, Pradeep Man)7; Panday, AK (Panday, Arnico K.)7; Wan, X (Wan, Xin)1,10; Bai, ZP (Bai, Zhipeng)4; Kang, SC (Kang, Shichang)8,9; Zhang, QG (Zhang, Qianggong)1,9; Cong, ZY (Cong, Zhiyuan)1,9
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
2019
Volume53Issue:7Pages:3471-3479
DOI10.1021/acs.est.9b00596
Abstract

Brown carbon (BrC) has recently emerged as an important light-absorbing aerosol. This study provides interannual and seasonal variations in light absorption properties, chemical composition, and sources of water-soluble BrC (WS-BrC) based on PM10 samples collected in Godavari, Nepal, from April 2012 to May 2014. The mass absorption efficiency of WS-BrC at 365 nm (MAE(365)) shows a clear seasonal variability, with the highest MAE(365) of 1.05 +/- 0.21 m(2) g(-1) in premonsoon season and the lowest in monsoon season (0.59 +/- 0.16 m(2) g(-1)). The higher MAE(365) values in nonmonsoon seasons are associated with fresh biomass burning emissions. This is further substantiated by a strong correlation (r = 0.79, P < 0.01) between Abs(365) (light absorption coefficient at 365 nm) and levoglucosan. We found, using fluorescence techniques, that humic-like and protein-like substances are the main chromophores in WS-BrC and responsible for 80.2 +/- 4.1% and 19.8 +/- 4.1% of the total fluorescence intensity, respectively. BrC contributes to 8.78 +/- 3.74% of total light absorption over the 300-700 nm wavelength range. Considering the dominant contribution of biomass burning to BrC over Godavari, this study suggests that reduction in biomass burning emission may be a practical method for climate change mitigation in South Asia.

Subject AreaEnvironmental Sciences
WOS IDWOS:000463679600014
Language英语
Indexed BySCI
KeywordLight-absorption Properties Chemical-composition Source Apportionment Organic Aerosols Black Carbon Biomass Fluorescence Pm2.5 Pm10 Particles
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
URL查看原文
PublisherAMER CHEMICAL SOC
SubtypeArticle
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9338
Collection图书馆
Corresponding AuthorCong, ZY (Cong, Zhiyuan)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
2.Banaras Hindu Univ, Inst Environm & Sustainable Dev, Varanasi 221005, Uttar Pradesh, India;
3.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China;
4.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;
5.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, Jiangsu, Peoples R China;
6.Univ Iowa, Dept Chem, Iowa City, IA 52246 USA;
7.Int Ctr Integrated Mt Dev, Khumaltar 009771, Lalitpur, Nepal;
8.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;
9.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
10.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Wu, GM (Wu, Guangming,Ram, K ,Fu, PQ ,et al. Water-Soluble Brown Carbon in Atmospheric Aerosols from Godavari (Nepal), a Regional Representative of South Asia[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(7):3471-3479.
APA Wu, GM .,Ram, K .,Fu, PQ .,Wang, W .,Zhang, YL .,...&Cong, ZY .(2019).Water-Soluble Brown Carbon in Atmospheric Aerosols from Godavari (Nepal), a Regional Representative of South Asia.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(7),3471-3479.
MLA Wu, GM ,et al."Water-Soluble Brown Carbon in Atmospheric Aerosols from Godavari (Nepal), a Regional Representative of South Asia".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.7(2019):3471-3479.
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