@Article{acp-8-2643-2008, AUTHOR = {Ryoo, J.-M. and Waugh, D. W. and Gettelman, A.}, TITLE = {Variability of subtropical upper tropospheric humidity}, JOURNAL = {Atmospheric Chemistry and Physics}, VOLUME = {8}, YEAR = {2008}, NUMBER = {10}, PAGES = {2643--2655}, URL = {http://www.atmos-chem-phys.net/8/2643/2008/}, DOI = {10.5194/acp-8-2643-2008} }