TY - RPRT TI - Polar Vortex Dynamics During Spring and Fall Diagnosed Using ATMOS Trace Gas Observation AU - Manney, G. AU - Michelsen, H. AU - Santee, M. AU - Gunson, M. AU - Irion, F. AU - Roche, A. AU - Livesey, N. PY - 1999 UR - https://ntrs.nasa.gov/citations/20060040585 ID - 20060040585 ER -