@Article{acpd-10-23381-2010,
AUTHOR = {Bister, M. and Kulmala, M.},
TITLE = {Anthropogenic aerosols may have increased upper tropospheric  humidity in the 20th century},
JOURNAL = {Atmospheric Chemistry and Physics Discussions},
VOLUME = {10},
YEAR = {2010},
NUMBER = {10},
PAGES = {23381--23402},
URL = {http://www.atmos-chem-phys-discuss.net/10/23381/2010/},
DOI = {10.5194/acpd-10-23381-2010}
}