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RISDynamics of Rossby Wave Packets in a Quantitative Potential Vorticity–Potential Temperature Framework
Publisher: American Meteorological Society
Abstract: ossby wave packets (RWPs) have been associated with increased atmospheric predictability but also with the growth and propagation of forecast uncertainty. To address the important question of under which conditions RWPs ...
Secondary Circulation of Tropical Cyclones in Vertical Wind Shear: Lagrangian Diagnostic and Pathways of Environmental Interaction
Publisher: American Meteorological Society
Abstract: his study introduces a Lagrangian diagnostic of the secondary circulation of tropical cyclones (TCs), here defined by those trajectories that contribute to latent heat release in the region of high inertial stability of ...
Lagrangian Description of Air Masses Associated with Latent Heat Release in Tropical Storm Karl (2016) during Extratropical Transition
Publisher: American Meteorological Society
Abstract: AbstractExtratropical transition (ET) of tropical cyclones involves distinct changes of the cyclone?s structure that are not yet well understood. This study presents for the first time a comprehensive Lagrangian description ...
Cyclogenesis Downstream of Extratropical Transition Analyzed by Q-Vector Partitioning Based on Flow Geometry
Publisher: American Meteorological Society
Abstract: uring extratropical transition (ET), tropical cyclones exert a significant impact on the midlatitude circulation. Archetypical features of this impact are jet streak formation, amplification of the downstream trough, and ...
Cluster Analysis Tailored to Structure Change of Tropical Cyclones Using a Very Large Number of Trajectories
Publisher: American Meteorological Society
Abstract: Major airstreams in tropical cyclones (TCs) are rarely described from a Lagrangian perspective. Such a perspective, however, is required to account for asymmetries and time dependence of the TC circulation. We present a ...
Hurricane Vortex Dynamics during Atlantic Extratropical Transition
Publisher: American Meteorological Society
Abstract: Simulations of six Atlantic hurricanes are diagnosed to understand the behavior of realistic vortices in varying environments during the process of extratropical transition (ET). The simulations were performed in real time ...
Rossby Wave Packets on the Midlatitude Waveguide—A Review
Publisher: American Meteorological Society
Abstract: AbstractRossby wave packets (RWPs) are Rossby waves for which the amplitude has a local maximum and decays to smaller values at larger distances. This review focuses on upper-tropospheric transient RWPs along the midlatitude ...
A Phase Locking Perspective on Rossby Wave Amplification and Atmospheric Blocking Downstream of Recurving Western North Pacific Tropical Cyclones
Publisher: American Meteorological Society
Abstract: The extratropical transition (ET) of tropical cyclones (TCs) can significantly influence the evolution of the midlatitude flow. However, the interaction between recurving TCs and upstream upper-level troughs features a ...
Quantitative View on the Processes Governing the Upscale Error Growth up to the Planetary Scale Using a Stochastic Convection Scheme
Publisher: American Meteorological Society
Abstract: AbstractTwo diagnostics based on potential vorticity and the envelope of Rossby waves are used to investigate upscale error growth from a dynamical perspective. The diagnostics are applied to several cases of global, ...
Tropical Transition of Hurricane Chris (2012) over the North Atlantic Ocean: A Multiscale Investigation of Predictability
Publisher: American Meteorological Society
Abstract: AbstractTropical cyclones that evolve from a nontropical origin and undergo tropical transition (TT) play a prominent role in cyclogenesis in the North Atlantic Ocean. They pose a special challenge for predictions, as they ...