TY - JOUR A1 - Bister, M. A1 - Kulmala, M. T1 - Anthropogenic aerosols may have increased upper tropospheric humidity in the 20th century JO - Atmos. Chem. Phys. Discuss. J1 - ACPD VL - 10 IS - 10 SP - 23381 EP - 23402 Y1 - 2010/10/11 PB - Copernicus Publications SN - 1680-7375 UR - http://www.atmos-chem-phys-discuss.net/10/23381/2010/ L1 - http://www.atmos-chem-phys-discuss.net/10/23381/2010/acpd-10-23381-2010.pdf DO - 10.5194/acpd-10-23381-2010 ER -