Arid
DOI10.1016/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
ISSN0048-9697
EISSN1879-1026
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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