Observing the Linkage of Atmospheric and Oceanic Front Using Remote Sensing Observations: A Case Study After the Passage of Tropical Cyclone Asani

The Marine Atmospheric Boundary Layer (MABL) is a hub of several important and dynamic phenomena, including eddies, gravity waves, atmospheric fronts, rolls, convective cells, etc. In particular, shear-induced and convective eddies drive the energy transfer from the ocean surface to the atmosphere. This energy transfer, in turn, is one of the key factors orchestrating the atmosphere-ocean dynamics. Using the data from the Earth Observation Satellite (EOS-04), a case study is conducted to examine frontal features in the ocean-atmosphere system. SAR and complementary data (Sentinel-3, GHRSST, and ECMWF) reveal the coeval emergence of oceanic and atmospheric fronts, thereby establishing a strong linkage between them. The concurrent presence of cyclone Asani suggests that the traversal of a cyclonic disturbance in the vicinity could account for this phenomenon. Tropical cyclones frequently generate a pronounced cold wake in the upper ocean; however, concurrent observations of both oceanic and atmospheric frontal boundaries in these environments remain uncommon. This study documents a unique instance of simultaneous air-sea frontal structures following a cyclone. These findings indicate coupled feedback mechanisms in which oceanic thermal gradients influence near-surface winds, while atmospheric forcing contributes to frontogenesis. This concurrent observational evidence highlights the significance of cyclone-induced cold-wake fronts as regions of active air-sea interaction, with potential consequences for regional weather prediction, upper-ocean biogeochemistry, and post-cyclone recovery processes.