Artistic imagination is also suggested via careful portrayalsfor example, several birds with legs aloft in the sky suggest flight, while half-opened wings suggest imminent flight.
With little vertical wind shear aloft, further intensification ensued as the newly formed hurricane continued to track over favorable sea surface temperatures.
For month-to-month and year-to-year variations, models and observations both show amplification (i.e., the month-to-month and year-to-year variations are larger aloft than at the surface).