Academy of Finland
Funding decision
 
Name Romakkaniemi, Sami Aulis
Organisation Finnish Meteorological Institute
Project title Supercooled Water in Mid-level Mixed-Phase Clouds: Microphysics, Dynamics and Global Radiation Balance. (COLDCLOUD)
Decision No. 309127
Decision date 20.06.2017
Funding,period 01.09.2017 - 31.08.2021
Funding 384 251
WebFOCUS Report
Project description
Mid-level clouds in the atmosphere are composed of supercooled liquid drops and ice particles. It has been observed, that clouds are not homogeneous, but quite often a layer of liquid water is found at the top of mixed-phase or ice particle cloud. This layer can be optically relatively thick compared to rest of the cloud as it contains a high number concentration of small droplets. Due to a low vertical resolution used in atmospheric models, the separation of cloud layers is not possible, and thus modeled clouds freeze too easily and their effect on atmospheric radiation is underestimated. In this project we develop new methods to parameterize the vertical structure of clouds into a global atmospheric model, and use the new model to estimate the radiative forcing of mid-level clouds and how it is expected to change in the warming atmosphere. Beyond that, we will explore the potential aerosol particles has in modifying the properties of these clouds.