The Wegener–Bergeron–Findeisen process (after Alfred Wegener, Tor Bergeron, and Walter Findeisen [de]), (or "cold-rain process") is a process of ice crystal growth that occurs in mixed phase clouds (containing a mixture of supercooled water and ice) in regions where the ambient vapor pressure falls between the saturation vapor pressure over wate...

Sep 1, 2007 · Phase transformation and precipitation formation in mixed-phase clouds are usually associated with the Wegener–Bergeron–Findeisen (WBF) process in which ice crystals grow at the expense of liquid droplets.

Jan 25, 2021 · The difference between CAM5_AMIP and CAM5_1850 simulations suggests that global warming amplifies the WBF’s impacts on cloud response over the Arctic, especially in spring, which is mainly caused by enhanced evaporation associated with …

Sep 20, 2011 · Cloud properties such as the probability density function (PDF) of vertical velocity (w), cloud liquid and ice, regimes of cloud particle growth, including the Wegener–Bergeron–Findeisen (WBF) process, and the relationships among properties/processes in mixed-phase clouds are examined to gain insights for improving their representation in ...

Dec 12, 2023 · In low ascent regions, ice crystals grow at the expense of cloud droplets within mixed-phase clouds through the WBF process, rapidly glaciating the cloud (decreasing γ). In high ascent regions, moisture supplied from lower altitudes offsets the WBF process (Korolev et …

Sep 12, 2022 · The type of mixed-phase cloudiness that is represented will impact the calculations of cloud optical properties and the WBF process rate, and thus the rate of glaciation. This also depends on the horizontal grid spacing which, depending on …

Apr 1, 2015 · The Wegener-Bergeron-Findeisen process refers to the rapid growth of ice crystals at the expense of surrounding cloud droplets, which frequently occurs in atmospheric mixed-phase clouds.

The Wegener-Bergeron-Findeisen process refers to the rapid growth of ice crystals at the expense of surrounding cloud droplets, which frequently occurs in atmospheric mixed-phase clouds.

Dec 11, 2011 · Modelling and theoretical studies have attempted to explain the counterintuitive persistence of Arctic mixed-phase clouds despite microphysical instability arising from the WBF mechanism.

Small particles in the WBF regime confirm the existence of small ice crystals! Size distributions are correlated very well to the humidity ranges that define the cloud regimes!