PT Journal AU Strahan, SE Smale, D Douglass, AR Blumenstock, T Hannigan, JW Hase, F Jones, NB Mahieu, E Notholt, J Oman, LD Ortega, I Palm, M Prignon, M Robinson, J Schneider, M Sussmann, R Velazco, VA TI Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018 SO Geophysical research letters PY 2020 BP Art. EP : VL 47 IS 17 DI 10.1029/2020GL088567 LA english ER