Climatology of large‐scale isentropic mixing in the Arctic winter stratosphere from analyzed winds Academic Article uri icon

abstract

  • During January and February a barrier to mixing, where exchange of air is inhibited, typically forms near the vortex boundary. At 450 K, transport across the barrier is predominantly in the form of thin filaments of particles ejected from the vortex. These filaments tend to wrap around the vortex, creating a layered structure of vortex and midlatitude air at the vortex edge. Near or total splits of the vortex into two or more distinct vortex fragments are quite common based on these trajectory calculations. During December and March the mixing barrier is less evident due to nonconservative factors during the spin-up and breakdown of the vortex, respectively. In December both ejection and entrainment are only weakly inhibited by the mixing barrier. Exchange in March is dominated by ejection of air from the vortex. -from Authors

author list (cited authors)

  • Dahlberg, S. P., & Bowman, K. P.

citation count

  • 34

publication date

  • January 1994