The Unconventional Eyewall Replacement Cycle of Hurricane Ophelia (2005)
| Autor: | Muhammad Naufal Razin, Michael M. Bell |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Monthly Weather Review. |
| ISSN: | 1520-0493 0027-0644 |
| DOI: | 10.1175/mwr-d-20-0181.1 |
| Popis: | Hurricane Ophelia (2005) underwent an unconventional eyewall replacement cycle (ERC) as it was a Category 1 storm located over cold sea surface temperatures near 23°C. The ERC was analyzed using airborne radar, flight-level, and dropsonde data collected during the Hurricane Rainband and Intensity Change Experiment (RAINEX) intensive observation period on 11 September 2005. Results showed that the spin-up of the secondary tangential wind maximum during the ERC can be attributed to the efficient convergence of absolute angular momentum by the mid-level inflow of Ophelia’s dominantly stratiform rainbands. This secondary tangential wind maximum strongly contributed to the azimuthal mean tangential wind field, which is conducive for increased low-level supergradient winds and corresponding outflow. The low-level supergradient forcing enhanced convergence to form a secondary eyewall. Ophelia provides a unique example of an ERC occurring in a weaker storm with predominantly stratiform rainbands, suggesting an important role of stratiform precipitation processes in the development of secondary eyewalls. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|