Some Value-Added Met-Ocean Products to the RAMMB’s TC Surface Analysis for Marine Meteorological Applications

Abstract

In the realm of air-sea interaction and marine meteorology, during a tropical cyclone (TC) worldwide since 2006, the Regional and Mesoscale Meteorological Branch (RAMMB) has issued surface wind analysis. Based on this TC’s isotach (line of equal wind speed) analysis, in this paper, much more meteorological-oceanographic (met-ocean) products are developed and value-added to these isotachs. They are, for marine meteorology, overwater friction velocity, wind stress, atmospheric vorticity and the mean vertical velocity, and for oceanography, significant wave height, drift-current velocity, wind-stress tide and wave set-up. Furthermore, in order to estimate the wind-stress induced storm surges, two case studies are presented. They are the Extremely Severe Cyclonic Storm Nargis which devastated Myanmar in May 2008 from the Bay of Bengal and in August 2023 Hurricane Idalia which impacted northeastern Gulf of Mexico coastal region of Florida.