Interaction of Sea Surface Temperature and Precipitation during Indian Ocean Dipole years in the Bay of Bengal

Author: K M Azam Chowdhury, Md Kawser Ahmed, M Khurshid Malik, Md Masud-ul-Alam, Sirajuddin Md. Babar Chowdhury
DOI: doi.org/10.70279/bmj-v1-i1-1098
Click here to view citation data

Satellite data of Sea Surface Temperature (SST) and Precipitation from the Tropical Rainfall Measuring Mission (TRMM) were analyzed to investigate the interactions between them in Indian Ocean Dipole (IOD) years in the Bay of Bengal (BoB), located at 5° N - 25° N and 80° E-100° E region. In an agricultural country like Bangladesh, the success or failure of sufficient rainfall and its effects on agricultural production and water scarcity on regional basis are always of great concern. Even, a small fluctuation in the seasonal rainfall can have devastating impacts on agricultural sector. Understanding of these variability's especially the extreme droughts and floods are of great importance because the country’s economy has bounded with the availability of monsoon rainfall. The SST has shown a significant relation with precipitation but there was some time lag. However, IOD did not show much regular influences on precipitation pattern. The investigation also reveals that SST was not the main parameter to occur the precipitation variation in the Bay. There may exist some other factors such as oceanic heat content, incoming solar radiation, wind etc, which might influence the seasonal/annual precipitation. Future study may reveal the other factors that control the precipitation pattern in the Bay including the whole Bangladesh land.