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Application of the Marsupial Paradigm to Tropical Cyclone Formation from Northwestward-Propagating DisturbancesA wave-tracking algorithm is developed for northwestward-propagating waves that, on occasion, play a role in tropical cyclogenesis over the western oceans. To obtain the Lagrangian flow structure, the frame of reference is translated obliquely at the same propagation speed with the precursor disturbance. Trajectory analysis suggests that streamlines in the obliquely translated frame of reference can be used to approximate flow trajectories. The algorithm was applied to Super Typhoon Nakri (2008), Tropical Cyclone Erika (2009), and a few other examples. Diagnoses of meteorological analyses and satellite-derived moisture and precipitation fields show that the marsupial framework for tropical cyclogenesis in tropical easterly waves is relevant also for northwestward-propagating disturbances as are commonly observed in the tropical western Atlantic, the Gulf of Mexico, and the western North Pacific. Finally, it is suggested that analysis of the global model data and satellite observations in the marsupial framework can provide useful guidance on early tropical cyclone advisories.
Document ID
20120002759
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wang, Zhuo
(Illinois Univ. at Urbana-Champaign Urbana, IL, United States)
Dunkerton, Timothy J.
(NorthWest Research Associates, Inc. Bellevue, WA, United States)
Montgomery, Michael T.
(Naval Postgraduate School Monterey, CA, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2012
Publication Information
Publication: Monthly Weather Review
Volume: 140
Issue: 1
ISSN: 1520-0493
Subject Category
Meteorology And Climatology
Funding Number(s)
CONTRACT_GRANT: NSF ATM-0733380
CONTRACT_GRANT: NSF ATM-0851554
CONTRACT_GRANT: NSF ATM-1016095
Distribution Limits
Public
Copyright
Other
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