01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-04-0158 |
| Title of Abstract | Heat and Salt Transport in the Indian Ocean by the Indonesian Throughflow |
| Authors | Dipanjan Dey* |
| Organisation | School of Earth, Ocean and Climate Sciences, IIT Bhubaneswar |
| Address | Indian Institute of Technology Bhubaneswar Khordha, Odisha, India Pincode: 752050 E-mail: dipanjandey@iitbbs.ac.in |
| Country | India |
| Presentation | Oral |
| Abstract | The Indonesian Throughflow (ITF) is an important oceanic current that carries warm, fresh, low-latitude Pacific Ocean water to the Indian Ocean. This mean flow of warm, fresh water, along with its variability, profoundly impacts the heat and freshwater budgets in the Indian Ocean, with significant consequences for regional weather and climate. After entering the Indian Ocean, it moves with the South Equatorial Current (SEC) and then splits into two components upon reaching Madagascar. The southern part exits to the Atlantic Ocean through the Agulhas Current system, while the northern section flows as the East African Coastal Current (EACC). Some portion of the ITF upwells in the Chagos⿿Seychelles Thermocline Ridge, and the remaining flow crosses the equator at the subsurface. Finally, it emerges at the surface in the North Indian Ocean upwelling regions (e.g., Somali, Oman) due to monsoon-driven winds, and then again crosses the equator southward. Although we have a fair understanding of the ITF's spreading in the Indian Ocean, we do not yet know how heat and salt change as it moves into different parts of the basin. To address this, we use a mass-conserving Lagrangian parcel-tracing algorithm with data from a 1/12 degree ocean hindcast simulation. At the conference, I will present the results from the currently running Lagrangian simulation. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Indonesian throughflow, Heat and Salt transport, Lagrangian Parcel tracing |
| For Awards | no |