Study of CO2 variability over India using data from satellites

The concentration levels of CO2 in Earth's atmosphere have rapidly increased over the last 250 years. The source of CO2 in the atmosphere is mainly human activity whereas few natural events such as volcanic activity, natural coal fires etc. also contribute to global CO2. The ground-based measurements provide a strong global constraint on both human and natural CO2 fluxes into the atmosphere. However the identification and characterization of strongest natural sources and sinks, and to discriminate the human CO2 emissions from the natural background, more comprehensive measurement network is needed. Such measurements are essential for the formulation of carbon management policies. For both spatial and temporal studies, detailed global measurements can be provided by satellites. The satellite instruments that provide or have provided atmospheric CO2 information include SCIAMACHY, GOSAT and OCO-2. Alongwith comparative study of SCIAMACHY and GOSAT derived CO2, analysis of recently obtained OCO-2 data is also performed. The GOSAT derived concentration values are about 1{2% smaller than those obtained from SCIAMACHY. The spatial and temporal variability of CO2 over the globe as well as over the Indian land boundary is studied. Comparison with the global view NOAA in-situ data and also location specific data is made.

[1]  M. Buchwitz,et al.  Global carbon monoxide as retrieved from SCIAMACHY by WFM-DOAS , 2004 .

[2]  John P. Burrows,et al.  SCIAMACHY—scanning imaging absorption spectrometer for atmospheric chartography , 1992 .

[3]  Kelly Chance,et al.  Scanning imaging absorption spectrometer for atmospheric chartography , 1991, Defense, Security, and Sensing.

[4]  M. Buchwitz,et al.  SCIAMACHY: Mission Objectives and Measurement Modes , 1999 .

[5]  Philippe Ciais,et al.  Weak Northern and Strong Tropical Land Carbon Uptake from Vertical Profiles of Atmospheric CO2 , 2007, Science.

[6]  Masakatsu Nakajima,et al.  Thermal and near infrared sensor for carbon observation Fourier-transform spectrometer on the Greenhouse Gases Observing Satellite for greenhouse gases monitoring. , 2009, Applied optics.

[7]  Maximilian Reuter,et al.  Anthropogenic carbon dioxide source areas observed from space: assessment of regional enhancements and trends , 2012 .

[8]  Peter Bergamaschi,et al.  Carbon Monoxide, Methane and Carbon Dioxide Columns Retrieved from SCIAMACHY by WFM-DOAS: Year 2003 Initial Data Set , 2005 .

[9]  David Crisp,et al.  The Orbiting Carbon Observatory (OCO-2): spectrometer performance evaluation using pre-launch direct sun measurements , 2014 .

[10]  Shantanu Rastogi,et al.  Study of satellite retrieved CO2 and CH4 concentration over India , 2014 .

[11]  Michael Buchwitz,et al.  A method for improved SCIAMACHY CO 2 retrieval in the presence of optically thin clouds , 2009 .

[12]  A Study of Co 2 and Related Trace Gases Using a Laser-Based Technique at an Urban Site in Western India , 2015 .

[13]  J. Canadell,et al.  Global and regional drivers of accelerating CO2 emissions , 2007, Proceedings of the National Academy of Sciences.

[14]  C. D. Keeling,et al.  Atmospheric CO 2 records from sites in the SIO air sampling network , 1994 .

[15]  P. Ciais,et al.  Long-lived atmospheric trace gases measurements in flask samples from three stations in India , 2015 .

[16]  Tatsuya Yokota,et al.  Preliminary validation of column-averaged volume mixing ratios of carbon dioxide and methane retrieved from GOSAT short-wavelength infrared spectra , 2010 .

[17]  Corinne Le Quéré,et al.  Climate Change 2013: The Physical Science Basis , 2013 .

[18]  V. Valsala,et al.  Influence of monsoons on atmospheric CO2 spatial variability and ground-based monitoring over India. , 2014, The Science of the total environment.