Water Transport In The Martian Northern Winter Polar Atmosphere D. J. Mccleese, Synoptic Science, Altadena, Ca, H. E. Gillespie, Lunar And Planetary Institute, Houston, Tx (Hgillespie@Lpi.Usra.Edu), A. Kleinböhl, D. M. Kass, Jet Propulsion Laboratory, California Institute Of Technology, Pasadena, Ca, S. J. Greybush, Pennsylvania State University, University Park, Pa, R. J. Wilson, Ames Research Center, Mountain View, Ca Introduction: The Martian Polar Vortices Are Challenging To Study In Part Due To The Large Gradients In Temperature, Wind, And Aerosol Fields At Their Boundaries As Well As The Transient And Stationary Waves That Often Have Their Largest Amplitudes Near The Polar Vortex Boundaries. This Work Focuses On Water Transport In The Vicinity Of, And Particularly At The Boundary Of, The Northern Winter Polar Vortex In Mars Year (My) 30, As Observed By The Mars Climate Sounder (Mcs) [1] And Simulated By The Ensemble Mars Atmosphere Reanalysis System (Emars) [2]. Understanding Of Cross-Boundary Transport Is Crucial To Understanding The Martian Water Cycle, Particularly The Influence Of The Multiple Kilometers Thick Permanent North Polar