01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-04-0386 |
| Title of Abstract | Impacts of marine heat wave Versus Integrated Moisture Transport and Precipitation Variability over Bay of Bengal and Arabian Sea during Post-monsoon Season of (2005-2014) and (2015-2024) |
| Authors | Prabodha Kumar Pradhan*, Lokesh Kumar Pandey, Akhilesh Mishra, Vinay Kumar |
| Organisation | Trident Group of Institutions, Bhubaneswar |
| Address | Prithvi Vihar Ncmrwf Staff Quarters Sec-62 Noida, Uttar Pradesh, India Pincode: 201309 E-mail: prabodha.svu@gmail.com |
| Country | India |
| Presentation | Poster |
| Abstract | This study assesses the sensitivity of marine heat wave (MHW) intensity over the Bay of Bengal during post-monsoon season (Oct-Nov-Dec) of two decades 2005-2014 and 2015-2024 are considered. The MHW examines the contributions of linear sea surface temperature (SST) warming and record-breaking SSTs to extreme MHWs in 2005-2014 and 2015-2024. The MHW is defined by the high threshold due to the SST warming trend >⿿90th percentile threshold value as compared to the seasonal climatology. The MHW over Arabian Sea (AS) and Bay of Bengal (BoB) referred as MHWa and MHWb, which are more prominent in the AS than BoB. The duration of MHW covers entire AS whereas MHW confines over the central BoB region. The duration of MHWa and MHWb during OND season, > 30-days observed in recent decades (2015-2024) as compared to past decades (2004-2013). However, the frequencies of MHW events are significantly higher in BoB than AS. However, their duration MHWa and MHWb increases 16- and 13-days during 2015-2024, indicating a growing role of long-term warming in AS and BoB regions in recent decades. Therefore, the integrated moisture transport (IMT), convective, and large-scale precipitation during two decades (2005-2014) and (2015-2024) over the AS and BoB, are analyzed from ERA5 reanalysis. The role of sub-tropical easterly jets are also analyzed to understand the variability of spatial variability of precipitations and discussed in this paper. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | MHW,Arabian Sea (AS), Bay of Bengal (BoB) |
| For Awards | no |