Abstract
AbstractTropical 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.
Funder
Narodowe Centrum Nauki
United States Department of Defense | United States Navy | Office of Naval Research
United States Department of Defense | United States Navy | U.S. Naval Research Laboratory
RCUK | Natural Environment Research Council
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
Reference74 articles.
1. ASEAN: Tropical Cyclone 26S (Seroja) Nusa Tenggara Islands, Indonesia, Flash Update #2. Association of Southeast Asian Nations (ASEAN). accessed 6 October 2021 (2021). https://reliefweb.int/sites/reliefweb.int/files/resources/FlashUpdate0207April2021-TC-26S-Seroja-Indonesia.pdf
2. Makmur, E. et al. Strengthening the Early Detection and Tracking of Tropical Cyclones near Indonesian Waters. In: IOP Conference Series: Earth and Environmental Science, vol. 925, p. 012010 (2021). IOP Publishing.
3. Podlaha, A. et al. Global Catastrophe Recap, May 2021. Impact Forecasting. accessed 5 October 2021 (2021). http://thoughtleadership.aon.com/Documents/20211006analytics-if-may-global-recap.pdf
4. BoM: Severe Tropical Cyclone Seroja. Bureau of Meteorology. accessed 8 September 2021 (2021). http://www.bom.gov.au/cyclone/history/seroja.shtml
5. Madden, R. A. & Julian, P. R. Description of global-scale circulation cells in the tropics with a 40-50 day period. J. Atmos. Sci. 29, 1109–1123 (1972).
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