Topic 2.0: Tropical cyclone formation and extratropical transition
Harr, Patrick A.
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In this section, progress since ITWC-VI on research, observations and forecasting of tropical cyclone formation and extratropical transition is summarized. While tropical cyclone formation and extratropical transition are stages at opposite ends of the tropical cyclone lifecycle, significant lack of understanding remains in relation to processes associated with each stage. Formation and extratropical transition involve interactions among physical processes that vary over multiple space and time scales. Additional, relatively few, consistent in situ observations of each stage exist. Tropical cyclone formation often occurs over remote regions that do not contain standard observation capabilities or are out of range of tropical cyclone observation program assets. While extratropoical transition may occur downstream from data rich continental regions, the stage is rarely targeted for in situ observations as the storm is no longer a landfall threat.
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The Extratropical Transition of Tropical Cyclones. Part II: Interaction with the Midlatitude Flow, Downstream Impacts, and Implications for Predictability Keller, Julia H.; Grams, Christian M.; Riemer, Michael; Archambault, Heather M.; Bosart, Lance; Doyle, James D.; Evans, Jenni L.; Galarneau, Thomas J.JR.; Griffin, Kyle; Harr, Patrick A.; Kitabatake, Naoko; McTaggart-Cowan, Ron; Pantillon, Florian; Quinting, Julian F.; Reynolds, Carolyn A.; Ritchie, Elizabeth A.; Torn, Ryan D.; Zhang, FuQing (American Meteorological Society, 2019-04);The extratropical transition (ET) of tropical cyclones often has an important impact on the nature and predictability of the midlatitude flow. This review synthesizes the current understanding of the dynamical and ...
Harr, Patrick A.; Carr, L.E., III; Elsberry, Russell L. (1997-09-30);Globally, tropical cyclone characteristics such as activity, genesis location, and track types have been observed to vary over space and time scales that range from seasonal to that of an individual cyclone. Because of ...
Simulations of the Extratropical Transition of Tropical Cyclones: Phasing between the Upper-Level Trough and Tropical Cyclones Ritchie, Elizabeth A.; Elsberrry, Russell L. (Monterey, California. Naval Postgraduate School, 2007);Whether the tropical cyclone remnants will become a significant extratropical cyclone during the reintensification stage of extratropical transition is a complex problem because of the uncertainty in the tropical cyclone, ...