The role of tropical waves in the genesis of Tropical Cyclone Seroja in the Maritime Continent
Abstract
Tropical cyclone Seroja was one of the first tropical cyclones to significantly impact Indonesian land, and the strongest one in such close proximity to Timor Island. In April 2021 Seroja brought historic flooding to near-equatorial regions of Indonesia and East Timor, as well as impacting Western Australia. Here we show that the unusual near-equatorial cyclogenesis in close proximity to a land mass was due to “perfect storm” conditions associated with multiple wave interactions. Specifically, this was associated with enhanced equatorial convection on the leading edge of a Madden–Julian Oscillation (MJO) event. Within the MJO, the interaction between a convectively coupled equatorial Rossby wave and two convectively coupled Kelvin waves span up the initial vortex and accelerated cyclogenesis. On average, such favorable atmospheric conditions can occur once per year. These results indicate the potential for increased predictability of tropical cyclones over the Maritime Continent.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 15, 2023
- Source ID
- 10.1038/s41467-023-36498-w
Entities
People
- Adam Rydbeck
- Adrian J. Matthews
- Beata Latos
- Dariusz B Baranowski
- Donaldi S. Permana
- Maria Flatau
- Nelly Florida Riama
- Philippe Peyrillé
- Piotr J. Flatau
- Thierry Lefort
Organizations
- National Science Centre Poland
- Natural Environment Research Council
- Office of Naval Research
- United States Naval Research Laboratory