<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "High-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds"^^ . "Water vapor is a crucial quantity in cloud studies at the aerosol and cloud chamber AIDA (Aerosol Interactions and Dynamics in the Atmosphere). The chamber is equipped with three tunable diode laser (TDL) hygrometers for the accurate and precise measurement of water vapor and total water concentration as well as liquid/ice water content down to the low ppb range. This thesis presents instrumental improvements, new developments, and assessment of the performance of these instruments – with special emphasis on measurement accuracy. For online evaluation of the AIDA TDL hygrometers’ measurement data, there is demand for a fast, accurate, and robust method which has been developed with the advanced integrative fitting algorithm. Besides utilization at AIDA, this algorithm could find further application in atmospheric trace gas measurements, combustion process analysis, or could be integrated into embedded systems with limited computing power. The capabilities of the AIDA TDL hygrometers have been applied to AIDA experiments investigating ice particle growth within cirrus clouds in the temperature range between 190 K and 235 K. These experiments could constrain the accommodation coefficient of water molecules on growing cirrus ice particles, alpha_ice, which is relevant for the initial stage of ice growth in cirrus clouds. The temperature averaged result alpha_ice=0.8_(-0.5)^(+0.2) suggests that cirrus ice particle growth is not significantly suppressed as it would be for a low alpha_ice<0.1. Therefore, implications of alpha_ice for cirrus clouds and their characteristics should be minor and future cirrus cloud model studies can rely on a well constrained alpha_ice."^^ . "2012" . . . . . . . . "Julian"^^ . "Skrotzki"^^ . "Julian Skrotzki"^^ . . . . . . "High-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds (PDF)"^^ . . . "PhD_thesis_Julian_Skrotzki_final.pdf"^^ . . . "High-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "High-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "High-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds (Other)"^^ . . . . . . "preview.jpg"^^ . . . "High-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds (Other)"^^ . . . . . . "medium.jpg"^^ . . . "High-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #13141 \n\nHigh-accuracy multiphase humidity measurements using TDLAS: application to the investigation of ice growth in simulated cirrus clouds\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .