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A Study of Co2 and Related Trace Gases Using a Laser-Based Technique at an Urban Site in Western India


Affiliations
1 Physical Research Laboratory, Ahmedabad 380 009, India
 

Continuous measurements of surface-level carbon dioxide (CO2) along with its co-emitted carbon monoxide (CO) and methane (CH4) are being made at Ahmedabad using a laser-based cavity ring down spectrometer, which offers much longer path length for accurate and fast measurements of these species simultaneously. The average data during November 2013 show large variability in all the three species. These measurements also show significant diurnal variations with maximum in CO being relatively the shortest-lived species in this set of gases. The correlations and slopes among them have been used to identify potential emission sources.

Keywords

Cavity Ring Down Spectroscopy, Fossil Fuel, Greenhouse Gases, India, Vehicular Emissions.
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  • Graven, H. D. et al., Enhanced seasonal exchange of CO2 by northern ecosystems since 1960. Science, 2013, 341, 1085–1089.

  • Myhre, G. et al., Anthropogenic and Natural Radiative Forcing, IPCC, Cambridge University Press, Cambridge, UK, 2013, pp. 659–740.

  • Kothawale, D. R. and Rupa Kumar, K., On the recent changes in surface temperature trends over India. Geophys. Res. Lett., 2005, 32, L18714; doi: 10.1029/2005GL023528.

  • Kulkarni, A. et al., Glacial retreat in Himalaya using Indian Remote Sensing satellite data. Curr. Sci., 2007, 92, 69–74.

  • Mallik, C. and Lal, S., Changing long-term trends in tropospheric temperature over two megacities in the Indo-Gangetic Plain. Curr. Sci., 2011, 101, 637–644.

  • Patra, P. K. et al., Carbon balance of South Asia constrained by passenger aircraft CO2 measurements. Atmos. Chem. Phys., 2011, 11, 4163–4175.

  • Patra, P. K. et al., The carbon budget of South Asia. Biogeosciences, 2013, 10, 513–527.

  • Tiwari, Y. K. et al., Carbon dioxide observations at Cape Rama, India for the period 1993–2002: implications for constraining Indian emissions. Curr. Sci., 2011, 101, 1562–1568.

  • Tiwari, Y. K. et al., Influence of monsoons on atmospheric CO2 spatial variability and ground-based monitoring over India. Sci. Total Environ., 2014, 490, 570–578.

  • Mahesh, P. et al., Impact of land–sea breeze and rainfall on CO2 variations at a coastal station. J. Earth Sci. Climatic Change, 2014, 5; doi: 10.4172/2157-7617.1000201.

  • Sharma, N. et al., Atmospheric CO2 variations in two contrasting environmental sites over India. Air, Soil Water Res., 2014, 7, 61– 68.

  • Lin, X. et al., Five-year flask measurements of long-lived trace gases in India. Atmos. Chem. Phys. Discuss., 2015, 15, 7171– 7238.

  • Patel, N., Dadhwal, V. and Saha, S., Measurement and scaling of carbon dioxide (CO2) exchanges in wheat using flux-tower and remote sensing. J. Indian Soc. Remote Sensing, 2011, 39, 383– 391.

  • Patil, M. et al., Measurements of carbon dioxide and heat fluxes during monsoon-2011 season over rural site of India by eddy covariance technique. J. Earth Syst. Sci., 2014, 123, 177–185.

  • Watham, T. et al., Monitoring of carbon dioxide and water vapour exchange over a young mixed forest plantation using eddy covariance technique. Curr. Sci., 2014, 107, 858–867.

  • Anderson, B. E. et al., Airborne observations of spatial and temporal variability of tropospheric carbon dioxide. J. Geophys. Res.: Atmos., 1996, 101, 1985–1997.

  • Machida, T. et al., Worldwide measurements of atmospheric CO2 and other trace gas species using commercial airlines. J. Atmos. Ocean. Technol., 2013, 25, 1744–1754.

  • Chen, H. et al., High-accuracy continuous airborne measurements of greenhouse gases (CO2 and CH4) using the cavity ring-down spectroscopy (CRDS) technique. Atmos. Meas. Tech., 2010, 3, 375–386.

  • Karion, A. et al., Long-term greenhouse gas measurements from aircraft. Atmos. Meas. Techn., 2013, 6, 511–526.

  • Suntharalingam, P. et al., Improved quantification of Chinese carbon fluxes using CO2/CO correlations in Asian outflow. J. Geophys. Res.: Atmos., 2004, 109; doi: 10.1029/2003JD004362.

  • Takegawa, N. et al., Removal of NOx and NOy in Asian outflow plumes: aircraft measurements over the western Pacific in January 2002. J. Geophys. Res.: Atmos., 2004, 109, doi: 10.1029/2004 JD004866.

  • Turnbull, J. C. et al., Comparison of 14CO2, CO, and SF6 as tracers for recently added fossil fuel CO2 in the atmosphere and implications for biological CO2 exchange. Geophys. Res. Lett., 2006, 33; doi: 10.1029/2005GL024213.

  • Han, S. et al., Temporal variations of elemental carbon in Beijing. J. Geophys. Res.: Atmos., 2009, 114; doi: 10.1029/2009JD012027.

  • Wang, Y. et al., CO2 and its correlation with CO at a rural site near Beijing: implications for combustion efficiency in China. Atmos. Chem. Phys., 2010, 10, 8881–8897.

  • Wunch, D. et al., Emissions of greenhouse gases from a North American megacity. Geophys. Res. Lett., 2009, 36; doi: 10.1029/ 2009GL039825.

  • Wong, K. W. et al., Mapping CH4 : CO2 ratios in Los Angeles with CLARS-FTS from Mount Wilson, California. Atmos. Chem. Phys., 2015, 15, 241–252.


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  • A Study of Co2 and Related Trace Gases Using a Laser-Based Technique at an Urban Site in Western India

Abstract Views: 411  |  PDF Views: 167

Authors

S. Lal
Physical Research Laboratory, Ahmedabad 380 009, India
N. Chandra
Physical Research Laboratory, Ahmedabad 380 009, India
S. Venkataramani
Physical Research Laboratory, Ahmedabad 380 009, India

Abstract


Continuous measurements of surface-level carbon dioxide (CO2) along with its co-emitted carbon monoxide (CO) and methane (CH4) are being made at Ahmedabad using a laser-based cavity ring down spectrometer, which offers much longer path length for accurate and fast measurements of these species simultaneously. The average data during November 2013 show large variability in all the three species. These measurements also show significant diurnal variations with maximum in CO being relatively the shortest-lived species in this set of gases. The correlations and slopes among them have been used to identify potential emission sources.

Keywords


Cavity Ring Down Spectroscopy, Fossil Fuel, Greenhouse Gases, India, Vehicular Emissions.

References





DOI: https://doi.org/10.18520/cs%2Fv109%2Fi11%2F2111-2116