01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-04-0159 |
| Title of Abstract | Understanding The Role Of Dominant Variabilities In Surface Heat Fluxes In Shaping The Sea Surface Temperature Over Bay of Bengal |
| Authors | Swapnil Das*, Dr. Rashmi Rekha Nayak, Rama Kanta Nayak |
| Organisation | IIT Kharagpur |
| Address | Centre for Ocean, River, Atmosphere and Land Sciences (CORAL) , Indian Institute of Technology Kharagpur, West Bengal, India Pincode: 721302 E-mail: swapnilphdkgpian.24@kgpian.iitkgp.ac.in |
| Country | India |
| Presentation | Poster |
| Abstract | The variability of sea surface temperature (SST) in the Bay of Bengal (BoB) is strongly influenced by surface latent heat flux (LHF), sensible heat flux (SHF), outgoing longwave radiation (OLR), and incoming shortwave radiation (ISR). Continuous wavelet spectrum analysis reveals two dominant variabilities with two distinct periods, 128-250 days and 260-512 days, which are evident in the surface heat fluxes in both northern and southern BoB, as obtained from daily interannual data. These dominant modes exert a significant influence on SST. A Butter-width filter is applied to isolate the dominant variabilities in both the surface heat fluxes and SST. Lead-lag correlation analysis is then used to determine the phase differences between a given variability in SST and the corresponding variability in the surface heat fluxes. This is followed by a partial correlation (PC) analysis between SST and surface heat flux, revealing notable linkages between the two and offering valuable insights into their underlying causes and feedback mechanisms. Two distinct sets of sensitivity experiments were conducted to investigate the impact of each profound temporal variability in surface heat fluxes on SST. This study presents a novel framework for isolating the relationship between various surface heat flux variabilities and SST. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Sea Surface Temperature, Surface Heat Fluxes, Continuous wavelet spectrum, Butter-width filter, Lead-lag correlation, Partial Correlation |
| For Awards | no |