edu.ucar.opensky::articles:26292 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:32:33.573872 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d70c50rp https://doi.org/10.7910/DVN/BKYGWW https Related Dataset #1 Replication Data for "Mixed-phase Direct Numerical Simulation: Ice Growth in Cloud-Top Generating Cells" https://doi.org/10.5281/zenodo.7226573 https Related Software #1 NCAR mixed-phase direct numerical simulation (DNS) Mixed-phase direct numerical simulation: ice growth in cloud-top generating cells 2023-05-09T00:00:00Z publication https://n2t.org/ark:/85065/d70c50rp https://doi.org/10.5194/acp-23-5217-2023 Chen, Sisi author Xue, Lulin author Tessendorf, Sarah A. author Ikeda, Kyoko author Weeks, Courtney author Rasmussen, Roy M. author Kunkel, M. author Blestrud, D. author Parkinson, S. author Meadows, M. author Dawson, N. author UCAR/NCAR - Library publisher In this study, a state-of-the-art microphysical model using a Lagrangian-particle-based direct numerical simulation framework is presented to examine the growth of ice particles in turbulent mixed-phase clouds. By tracking the interactions between individual ice, droplets, and turbulence at the native scales, the model offers new insights into the microphysical processes taking place in mixed-phase clouds at sub-meter-length scales.This paper examines the conditions that favor effective ice growth in the cloud-top generating cells (GCs), which are small regions of enhanced radar reflectivity near cloud tops. GCs are commonly observed in many types of mixed-phase clouds and play a critical role in producing precipitation from rain or snow. Investigations over a range of environmental (macrophysical and turbulent) and microphysical conditions (ice number concentrations) that distinguish GCs from their surrounding cloudy air were conducted.Results show that high liquid water content (LWC) or high relative humidity (RH) is critical for effective ice growth and the maintenance of mixed-phase conditions. As a result, GCs with high LWC and high RH provide favorable conditions for rapid ice growth. When the ice number concentration is below 1 cm-3, which is typical in mixed-phase clouds, a high LWC is needed for the formation of large ice particles. The study also found that supersaturation fluctuations induced by small-scale turbulent mixing have a negligible effect on the mean particle radius, but they can substantially broaden the size spectra, affecting the subsequent collection process. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation