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RISOn the Ability of Dry Tropical-Cyclone-like Vortices to Withstand Vertical Shear
Publisher: American Meteorological Society
Abstract: The ability of dry tropical-cyclone-like vortices to resist vertical shear is discussed. An idealized model calculation is presented in which a dry vortex remains nearly upright during 4 days under the influence of ...
The Extratropical Transitions of Hurricanes Felix and Iris in 1995
Publisher: American Meteorological Society
Abstract: The extratropical transitions of Hurricanes Felix and Iris in 1995 are examined and compared. Both systems affected northwest Europe but only Iris developed significantly as an extratropical system. In both cases the ...
The Resonant Interaction of a Tropical Cyclone and a Tropopause Front in a Barotropic Model. Part I: Zonally Oriented Front
Publisher: American Meteorological Society
Abstract: The interaction of a tropical cyclone and a zonally aligned tropopause front is investigated in an idealized framework. A nondivergent barotropic model is used in which the front is represented by a vorticity step, giving ...
Potential Vorticity Inversion for Tropical Cyclones Using the Asymmetric Balance Theory
Publisher: American Meteorological Society
Abstract: A three-dimensional model is developed, based upon the recently derived asymmetric balance (AB) formulation of Shapiro and Montgomery, to study the evolution of rapidly rotating vortices, including hurricanes. A particular ...
The Resonant Interaction of a Tropical Cyclone and a Tropopause Front in a Barotropic Model. Part II: Frontal Waves
Publisher: American Meteorological Society
Abstract: The influence of frontal waves on the interaction of a tropical cyclone and a tropopause front is investigated in an idealized framework. In a nondivergent barotropic model the front is represented by a vorticity step with ...
On the Impact of Tropical Cyclones on Rossby Wave Packets: A Climatological Perspective
Publisher: American Meteorological Society
Abstract: any studies have highlighted the importance of recurving tropical cyclones (TCs) in triggering Rossby waves. This study investigates the impact of western North Pacific (WNP), south Indian Ocean, and North Atlantic recurving ...
Singular Vectors for Barotropic, Hurricane-Like Vortices in Horizontal Shear: Structure and Perturbation Growth Mechanisms
Publisher: American Meteorological Society
Abstract: n this study the structure and evolution of singular vectors (SVs) for stable and unstable hurricane-like vortices in background flows with horizontal shear are investigated on f and ? planes using a nondivergent barotropic ...
Predictability Associated with the Downstream Impacts of the Extratropical Transition of Tropical Cyclones: Methodology and a Case Study of Typhoon Nabi (2005)
Publisher: American Meteorological Society
Abstract: Measures of the variability among ensemble members from the National Centers for Environmental Prediction ensemble prediction system are examined with respect to forecasts of the extratropical transition (ET) of Typhoon ...
Predictability Associated with the Downstream Impacts of the Extratropical Transition of Tropical Cyclones: Case Studies
Publisher: American Meteorological Society
Abstract: The extratropical transition (ET) of tropical cyclones often has a negative impact on the predictability of the atmospheric situation both around the ET event and farther downstream. The predictability of five ET cases of ...
Novel Metrics for Evaluation of Ensemble Forecasts of Tropical Cyclone Structure
Publisher: American Meteorological Society
Abstract: Predicting extratropical transition (ET) of a tropical cyclone poses a significant challenge to numerical forecast models because the storm evolution depends on both the timing of the phasing between the tropical cyclone ...