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| Abstract Submission No. | ABS-2022-07-0376 |
| Title of Abstract | Analyses of atmospheric CO2 over the Indian Ocean using satellite measurements for the period 2002-2016 |
| Authors | Rony Peter*, Jayanarayanan Kuttippurath, Kunal Chakraborty |
| Organisation | CORAL, Indian Institute of Technology, Kharagpur |
| Address | CORAL, Indian Institute of Technology Kharagpur Kharagpur, West Bengal, India Pincode: 721302 Mobile: 9495214749 E-mail: ronypeter8@gmail.com |
| Country | India |
| Presentation | Poster |
| Abstract | Carbon dioxide (CO2) is fourth most abundant gas and also an important greenhouse gas in the Earth's Atmosphere. Since it is climate relevant trace gas, monitoring the spatial and temporal variability of CO2 is very important in the context of climate change. Here, the variability of CO2 in different time periods over the Indian Ocean and surrounding land areas is studied using the Atmospheric Infrared Sounder (AIRS) satellite data for the period 2002-2016. The analysis is performed for different seasons; monthly and annual scales. Spatial analysis of CO2 distribution reveals that its concentration is highest during the pre-monsoon season and lowest in the post monsoon season over the North Indian Ocean, whereas it is highest in the post monsoon season and lowest in the pre-monsoon in South Indian Ocean. Therefore, to further investigate the interannual and seasonal variability of CO2 in the northern and southern Indian Ocean, the analyses are done for different oceanic domains, such as Northern Indian Ocean (NIO) [ 0°N-30°N , 30°E- 120°E] ,Southern Indian Ocean (SIO) [ -30°S -0°, 30°E - 120°E], Bay of Bengal (BoB) [4°N- 24°N, 76°E- 100°E] and Arabian Sea (AS) [4°N- 24°N, 45°E- 75°E]. The analyses show that the largest values of about 388-415 ppm are found during the pre-monsoon season, but about 387-406 ppm over NIO, BoB and AS during the post monsoon season. The CO2 concentration shows an increase of about 2.13 ppm / year over the AS, which is also comparable to the global increase of about 2.11 ppm / year during the same period of 2002-2016. Since CO2 is one of the strongest GHGs, the continued increase in atmospheric CO2 is a serious concern for climate change. |