01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-06-0199 |
| Title of Abstract | Mechanisms governing the recent trends and variability of air-sea CO2 flux over the dynamically different sectors of the Indian Ocean |
| Authors | VISWAJITH ALEX*, Dr Sandeep K K |
| Organisation | IIT Bhubaneswar |
| Address | IIT Bhubaneswar ,Argul ,Khordha ,Odisha Bhubaneswar, Odisha, India Pincode: 752050 E-mail: 24cl05012@iitbbs.ac.in |
| Country | India |
| Presentation | Poster |
| Abstract | The increase in anthropogenic carbon emissions in the atmosphere is partially counterbalanced by the oceans' increased carbon uptake. The tropical region exhibits a nearly balanced net carbon flux compared to other areas. The Indian Ocean (IO), located in the tropics, experiences a seasonal climate and significant river influx, resulting in annual variability in CO2 flux across different ocean regions. The landlocked northern boundary and seasonal reversal of surface winds and upper oceanic current patterns constitute the fundamental factors driving the spatiotemporal variability of biogeochemical processes over this region. Of particular significance is the seasonal variability of phytoplankton bloom and carbon flux exchange occurring at the air-sea interface over this highly dynamic region. Further, the two intracontinental basins of the northern tropical IO i.e., the Arabian Sea and the Bay of Bengal exhibit strikingly different biogeochemical properties irrespective of the fact that are situated within the same latitudinal extent and experience the seasonal reversal of atmospheric and oceanic general circulation patterns. This study examines the spatiotemporal variability of air-sea CO2 flux by utilising a resolution dataset from the Surface Ocean CO2 Atlas version 2024 (SOCATv2024). Seasonal variations in CO2 flux are particularly evident over the Bay of Bengal and the Arabian Sea. Several driving factors influence these changes in CO2 levels, such as the upper oceanic temperature, salinity, upwelling processes and presence dissolved inorganic carbon, etc. which exhibit varying strength and dominance over the dynamically different sectors of the IO. Because the IO is experiencing basin-wide warming at an alarming rate in the last few years, the impact of such high SST distribution on the climatological CO2 source and sink regions over the IO are also examined. The variations with the driving factors of air-sea flux and their trends over the recent decades provide important implications for Indian Ocean warming. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Carbon dioxide flux, Jena CarboScope, Indian ocean biogeochemical cycle, |
| For Awards | no |