Maps of MLS HCI in the lower stratosphere (520 K, 20km) detailing the springtime breakup of the 2004 Antarctic vortex. The vortex broke into several fragments between 5 and 11 December, and the evolution and erosion of those fragments are shown through late December, when only one weak fragment remains. After chlorine deactivation by early October, high vortex HCI and very strong HCI gradients across the vortex edge make it an excellent tracer of vortex evolution and morphology
12.2004
