Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.scitotenv.2016.02.014 |
Variability of atmospheric carbonyl sulfide at a semi-arid urban site in western India | |
Mallik, Chinmay1,2; Chandra, Naveen1,3; Venkataramani, S.1; Lal, Shyam1 | |
通讯作者 | Mallik, Chinmay |
来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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ISSN | 0048-9697 |
EISSN | 1879-1026 |
出版年 | 2016 |
卷号 | 551页码:725-737 |
英文摘要 | Atmospheric carbonyl sulfide (COS) is a major precursor for sulfate aerosols that play a critical role in climate regulation. Recent studies have highlighted the importance of COS measurements as a reliable means to constrain biospheric carbon assimilation. In a scenario of limited availability of COS data around the globe, we present gas-chromatographic measurements of atmospheric COS mixing ratios over Ahmedabad, a semi-arid, urban region in western India. These measurements, being reported for the first time over an Indian site, enable us to understand the diurnal and seasonal variation in atmospheric COS with respect to its natural, anthropogenic and photochemical sources and sinks. The annual mean COS mixing ratio over Ahmedabad is found to be 0.83 +/- 0.43 ppbv, which is substantially higher than free tropospheric values for the northern hemisphere. Inverse correlation of COS with soil and skin temperature, suggests that the dry soil of the semi-arid study region is a potential sink for atmospheric COS. Positive correlations of COS with NO2 and CO during post-monsoon and the COS/CO slope of 0.78 pptv/ppbv reveals influence of diesel combustion and tire wear. The highest concentrations of COS are observed during pre-monsoon; COS/CO2 slope of 44.75 pptv/ppmv combined with information from air mass back-trajectories reveal marshy wetlands spanning over 7500 km(2) as an important source of COS in Ahmedabad. COS/CO2 slopes decrease drastically (8.28 pptv/ppmv) during post-monsoon due to combined impact of biospheric uptake and anthropogenic emissions. (C) 2016 Elsevier B.V. All rights reserved. |
英文关键词 | Carbonyl sulfide Natural sinks Anthropogenic sources Biosphere COS/CO2 slopes |
类型 | Article |
语种 | 英语 |
国家 | India ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000372589800076 |
WOS关键词 | REDUCED SULFUR-COMPOUNDS ; PULSED-FLAME PHOTOMETER ; GAS-CHROMATOGRAPHY ; COMPOUNDS RSCS ; EMISSIONS ; COS ; HYDROCARBONS ; AEROSOLS ; IMPACT ; SO2 |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/196205 |
作者单位 | 1.Phys Res Lab, Ahmadabad 380009, Gujarat, India; 2.Max Planck Inst Chem, Mainz, Germany; 3.Indian Inst Technol, Gandhinagar, India |
推荐引用方式 GB/T 7714 | Mallik, Chinmay,Chandra, Naveen,Venkataramani, S.,et al. Variability of atmospheric carbonyl sulfide at a semi-arid urban site in western India[J],2016,551:725-737. |
APA | Mallik, Chinmay,Chandra, Naveen,Venkataramani, S.,&Lal, Shyam.(2016).Variability of atmospheric carbonyl sulfide at a semi-arid urban site in western India.SCIENCE OF THE TOTAL ENVIRONMENT,551,725-737. |
MLA | Mallik, Chinmay,et al."Variability of atmospheric carbonyl sulfide at a semi-arid urban site in western India".SCIENCE OF THE TOTAL ENVIRONMENT 551(2016):725-737. |
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