Current scenario of ambient carbon dioxide levels at multiple locations in urban Ahmedabad revealed by a 2004 nm tunable diode laser spectroscopy system

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dc.contributor.author Roy, Anirban
dc.contributor.author Sharma, Neetesh Kumar
dc.contributor.author Chakraborty, Arup Lal
dc.contributor.author Upadhyay, Abhishek
dc.contributor.other IEEE SENSORS 2017
dc.coverage.spatial Glasgow, UK
dc.date.accessioned 2017-12-06T05:29:09Z
dc.date.available 2017-12-06T05:29:09Z
dc.date.issued 2017-10-29
dc.identifier.citation Roy, Anirban; Sharma, Neetesh Kumar; Chakraborty, Arup Lal and Upadhyay, Abhishek, "Current scenario of ambient carbon dioxide levels at multiple locations in urban Ahmedabad revealed by a 2004 nm tunable diode laser spectroscopy system", in the IEEE SENSORS 2017, Glasgow, UK, Oct. 29- Nov. 1, 2017. en_US
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/3341
dc.identifier.uri https://doi.org/10.1109/ICSENS.2017.8234369
dc.description.abstract This paper reports the design and deployment of a portable tunable diode laser spectroscopy system for in situ measurement of atmospheric carbon dioxide. Recent measurements made at three busy locations in urban Ahmedabad in India reveal that the mean values of mole fraction of carbon dioxide are significantly higher than the global average of 406.05 ppm. This is most likely due to the huge amount of automobile emissions in these congested areas and poor regulation of vehicular emissions. The measurements use a calibration-free second harmonic wavelength modulation spectroscopy (2/WMS) technique developed in our group. A narrow linewidth tunable vertical cavity surface-emitting laser (VCSEL) is used to selectively interrogate the carbon dioxide transition at 2003.5 nm. The mole fraction of carbon dioxide is extracted in real-time from least-squares fit of a simulated 2/ WMS line shape to the experimentally obtained 2/ WMS signal. The calibration-free nature of measurements eliminates the need for calibrated gas mixtures that are required in other techniques. This made it possible to deploy the system in the field.
dc.description.statementofresponsibility by Anirban Roy, Neetesh Kumar Sharma, Arup Lal Chakraborty and Abhishek Upadhyay
dc.language.iso en en_US
dc.publisher IEEE en_US
dc.title Current scenario of ambient carbon dioxide levels at multiple locations in urban Ahmedabad revealed by a 2004 nm tunable diode laser spectroscopy system en_US
dc.type Article en_US


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