- Dona Paula, Goa, India.
- +91-0832- 2450327
- iiosc2020[at]nio[dot]org
| Abstract Submission No. | ABS-2022-07-0055 |
| Title of Abstract | Influence of the Upper ocean structure on Monsoons in the Bay of Bengal |
| Authors | Amit Tandon*, Eric D'Asaro, Simon DeSzoeke, Tom Farrar, Andrew Lucas, Jennifer Mackinnon, Pattabhi Rama Rao, Debasis Sengupta, Emily Shroyer, Ramasamy Venkatesan |
| Organisation | UMass Dartmouth |
| Address | Mech Engg, UMass Dartmouth North Dartmouth, MA, United States Pincode: 02747 Mobile: 5082646617 E-mail: atandon@umassd.edu |
| Country | United States |
| Presentation | Oral |
| Abstract | Moisture and heat fluxes from the Bay of Bengal, and multi-scale air-sea interactions play an important role in tropical convection associated with the Indian monsoon precipitation. The complex spatial structure of upper ocean heat content and temperature distribution is determined largely by the salinity stratified shallow layers in the North Bay. Although coupled models suggest that air-sea coupling over the Bay of Bengal improves the strength, time scales and propagation of monsoon convection and precipitation on intra-seasonal time scales, the physical mechanisms of coupling are not well known. This has motivated two successive large Indo-US collaborative programs. The first one, ASIRI-OMM, explored the upper ocean structure and air-sea fluxes in much detail via multiple cruises in 2013-2015 with Indian and USA research vessels. A followup collaboration called Monsoon Intra-seasonal oscillations in the Bay of Bengal (MISO-BOB) explored the role of coupled ocean-atmosphere boundary layer processes, with the help of simultaneous, detailed measurements of the oceanic and atmospheric boundary layers and air-sea fluxes. Its objectives are to understand the ocean's influence on the intensity and propagation of the coupled ocean-atmosphere MISO signal, and to evaluate how the sub-mesoscale and mesoscale processes governing the ocean boundary layers impact the MISOs. The intensive observations conducted in 2018 and 2019 include coupled boundary layer observations during the Monsoon onset in 2018, and the coupled boundary layers at the edge of a mesoscale eddy during 2019. Significant training workshops for young scientists formed an integral part of these collaborations. Salient results from these collaborations will be presented in this talk. |