The effects of warm and cold core eddy processes on cyclone activity

It is a well-established that the Tropical Cyclones (TC) often fuel from the thermal energy stored in the ocean top layer. As the ocean mixed layer temperature is able to modulate the air-sea interactions between ocean and tropical cyclones, the identified changes/dominant processes in mixed layer heat budget could have notable impact on the cyclone intensity and propagation. The present study examines the role of distinct oceanic mixed layer processes over warm and cold core eddies in impacting the tropical cyclones. Three severe cyclones are studied. We have examined the relationship between mixed layer heat budget terms and the cyclone genesis potential parameters, with a focus on cyclones approaching and sustained time over warm-core eddy regions. To further examine the role of different Ocean variables on atmospheric counterparts of cyclones, we have computed the area-averaged values of these Ocean variables and the Genesis Potential Parameter (GPP) index for warm-core eddy region. The temperature tendency shows highest magnitude of negative correlation with GPP. Among all the parameters that determines net heat flux, the net latent heat flux showing high response/influence on GPP. The relatively moderate correlation values between latent heat flux and GPP is evident during the active period of cyclones. The findings found in the present study has vital future scope in the area or studies related to air-sea interactions particularly for the case of tropical cyclones and adaptation of such knowledge in forecast models could enhance the predictions.