@Article{acp-8-3689-2008,
AUTHOR = {Levine, J. G. and Braesicke, P. and Harris, N. R. P. and Pyle, J. A.},
TITLE = {Seasonal and inter-annual variations in troposphere-to-stratosphere transport from the tropical tropopause layer},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {8},
YEAR = {2008},
NUMBER = {13},
PAGES = {3689--3703},
URL = {http://www.atmos-chem-phys.net/8/3689/2008/},
DOI = {10.5194/acp-8-3689-2008}
}