TY - JOUR A1 - Krüger, K. A1 - Tegtmeier, S. A1 - Rex, M. T1 - Variability of residence time in the Tropical Tropopause Layer during Northern Hemisphere winter JO - Atmos. Chem. Phys. J1 - ACP VL - 9 IS - 18 SP - 6717 EP - 6725 Y1 - 2009/09/16 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/9/6717/2009/ L1 - https://acp.copernicus.org/articles/9/6717/2009/acp-9-6717-2009.pdf DO - 10.5194/acp-9-6717-2009 ER -