TY - JOUR A1 - Haag, W. A1 - Kärcher, B. A1 - Ström, J. A1 - Minikin, A. A1 - Lohmann, U. A1 - Ovarlez, J. A1 - Stohl, A. T1 - Freezing thresholds and cirrus cloud formation mechanisms inferred from in situ measurements of relative humidity JO - Atmos. Chem. Phys. J1 - ACP VL - 3 IS - 5 SP - 1791 EP - 1806 Y1 - 2003/10/27 PB - Copernicus Publications SN - 1680-7324 UR - http://www.atmos-chem-phys.net/3/1791/2003/ L1 - http://www.atmos-chem-phys.net/3/1791/2003/acp-3-1791-2003.pdf DO - 10.5194/acp-3-1791-2003 ER -