Daniel Keyser

TL;DR: In this article, the authors focused on the structural characteristics of fronts and their associated jet streams near the tropopause, and on the diagnosis of the frontogenetic processes and secondary circulations governing their life cycles.

TL;DR: The development of structural models of upper-level frontal systems from the application of upper air data to analyses utilizing radiosonde and aircraft observations is reviewed in this paper, where the effects of turbulent processes and baroclinic waves on frontal structures and dynamics are examined.

TL;DR: In this paper, the authors studied the effect of upper-tropospheric troughs on the intensity of tropical cyclones in the Atlantic tropical cyclone data set between 1985 and 1996, and classified the trough interaction cases into four composites: (i) favorable superposition, (ii) unfavorable superposition and (iii) favorable distant interaction, and (iv) unfavorable distant interaction.

TL;DR: In this paper, the effects of condensation and evaporation on mesoscale frontal circulations in a two-dimensional numerical model were investigated using an explicit scheme for the prediction of water vapor, cloud water and rainwater.

TL;DR: The Presidents' Day cyclone of 18-19 February 1979 is analyzed based on conventional radiosonde data, infrared and visible satellite imagery, water vapor images and ozone measurement as mentioned in this paper.