Arid
DOI10.1016/j.jmarsys.2012.11.004
Atmospheric dry-deposition of mineral dust and anthropogenic trace metals to the Bay of Bengal
Srinivas, Bikkina; Sarin, M. M.
通讯作者Sarin, M. M.
来源期刊JOURNAL OF MARINE SYSTEMS
ISSN0924-7963
EISSN1879-1573
出版年2013
卷号126页码:56-68
英文摘要

This manuscript presents a comprehensive data set on concentrations of crustal elements (Al, Ca, Fe and Mg) and trace metals (Pb, Cd, Cu, Mn, Cr, Co and Ni) in ambient aerosols studied from the marine atmospheric boundary layer (MABL) of the Bay of Bengal during the period of continental outflow (January-April). Based on cruises conducted during January’09 (winter) and March-April’06 (spring inter-monsoon), mass concentrations (ng m(-3)) of Pb (9-57), Cd (0.01-2.8), Cr (1-17) and Mn (4-103) in the outflow from the Indo-Gangetic Plain were higher during the winter compared to those in the spring inter-monsoon (Pb: 3.2-13.5; Cd: 0.1-1.6; Cr: 02-7.2 and Mn: 4.6-42.7). In contrast, Cu concentration was relatively high during the spring inter-monsoon (3.2-27.9 ng m(-3)); whereas concentrations of Co and Ni were not significantly different (p-value > 0.05) during the two seasons. In general, enrichment factors of Pb and Cd are higher (EFPb: similar to 225; EFCd: similar to 1165) over the southern Bay (south of 15 degrees N) associated with south-east Asian outflow. A significant (p-value<0.05) linear relation of Pb, Cd and Cu with nss-SO42- reaffirms their anthropogenic origin. Another notable feature of temporal data relates to significantly higher ratios of crustal elements (Ca/Al and Fe/Al) associated with the long-range transport of mineral dust from the Thar Desert during the spring inter-monsoon. The deposition of mineral dust (0.3-6 g m(-2) yr(-1)) to the Bay of Bengal is consistent with model results reported in the literature. However, the dominance of anthropogenic trace metals and their air-sea deposition must be considered in any assessment of factors that influence the marine ecosystem in the Bay of Bengal. (c) 2012 Elsevier B.V. All rights reserved.


英文关键词Bay of Bengal Anthropogenic trace metals Aerosol toxicity Mineral dust Air-sea deposition fluxes Residence time
类型Article ; Proceedings Paper
语种英语
国家India
收录类别SCI-E ; CPCI-S
WOS记录号WOS:000324785000006
WOS关键词ARABIAN SEA ; IRON SOLUBILITY ; OPEN-OCEAN ; AEROSOLS ; FLUXES ; INPUT ; VARIABILITY ; CHEMISTRY ; MANGANESE ; ELEMENTS
WOS类目Geosciences, Multidisciplinary ; Marine & Freshwater Biology ; Oceanography
WOS研究方向Geology ; Marine & Freshwater Biology ; Oceanography
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/178578
作者单位Phys Res Lab, Ahmadabad 380009, Gujarat, India
推荐引用方式
GB/T 7714
Srinivas, Bikkina,Sarin, M. M.. Atmospheric dry-deposition of mineral dust and anthropogenic trace metals to the Bay of Bengal[J],2013,126:56-68.
APA Srinivas, Bikkina,&Sarin, M. M..(2013).Atmospheric dry-deposition of mineral dust and anthropogenic trace metals to the Bay of Bengal.JOURNAL OF MARINE SYSTEMS,126,56-68.
MLA Srinivas, Bikkina,et al."Atmospheric dry-deposition of mineral dust and anthropogenic trace metals to the Bay of Bengal".JOURNAL OF MARINE SYSTEMS 126(2013):56-68.
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