A downward developing mesoscale cyclone over the Ross Ice Shelf during Winter

A case of midtropospheric mesoscale cyclone formation and downward development adjacent to and over the Ross Ice Shelf, Antarctica during May 1988 is presented. This event involved atmospheric phenomena over a wide range of spatial scales from the meso to the synoptic. The mesoscale vortex apparently developed within a middle-level short-wave trough. Warm air advection associated with a synoptic-scale front, which developed upwind from the axis of a blocking ridge located over the Antarctic Peninsula and which traveled westward across West Antarctica, created a strong temperature gradient (baroclinic zone) at low-levels at the northern edge of the Ross Ice Shelf. The atmosphere below the initially midtropospheric mesoscale vortex was destablized by the warm air advection, inducing its downward development.

Details

Publication status:
Published
Author(s):
Authors: Bromwich, David H., Carrasco, Jorge F., Turner, John

On this site: John Turner
Date:
1 January, 1996
Journal/Source:
Global Atmosphere and Ocean System / 4
Page(s):
125-147