Research support provided by NSF Grant AGS-1355960
"Upper-Tropospheric Precursors Associated with Subtropical Cyclone Formation in the North Atlantic Basin"
This study investigates the roles of baroclinic and diabatic processes during the evolution of subtropical cyclones (STCs) by calculating three potential vorticity (PV) metrics from the 0.5° NCEP CFSR dataset. The three PV metrics quantify the relative contributions of lower-tropospheric baroclinic processes, midtropospheric diabatic heating, and upper-tropospheric dynamical processes during the evolution of individual cyclones. Quantification of these three contributions reveals the changing PV structure of an individual cyclone, indicates fluctuations in the dominant energy source of the cyclone, and aids in categorizing the cyclone.
Research support provided by NSF Grant AGS-0935830
Bentley, A. M., L. F. Bosart, and D. Keyser, 2017: Upper-tropospheric precursors to the formation of subtropical cyclones that undergo tropical transition in the North Atlantic basin. Mon. Wea. Rev., 145, 503-520.
Bentley, A. M., D. Keyser, and L. F. Bosart, 2016: A dynamically based climatology of subtropical cyclones that undergo tropical transition in the North Atlantic basin. Mon. Wea. Rev., 144, 2049-2068.
Bentley, A. M., and N. D. Metz, 2016: Tropical transition of an unnamed, high-latitude, tropical cyclone over the eastern North Pacific. Mon. Wea. Rev., 144, 713-736.
Laird, N., A. M. Bentley,
S. Ganetis, A. Stieneke, and S. A. Tushaus, 2016: Climatology of lake-effect
precipitation events over Lake Tahoe and Pyramid Lake. J. Appl. Meteor.
Climatol., 55, 297-312.
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