edu.ucar.gdex::d583148 eng; USA utf-8 dataset NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu NSF NCAR Geoscience Data Exchange The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research. download pointOfContact 2026-04-21T17:23:07Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/z9wk-1x22 Turbulent activation of cloud condensation nuclei d583148 2021-07-14 publication Grabowski, Wojciech W. author NSF National Center for Atmospheric Research publisher This dataset contains selected codes and data from simulations investigating the impact of cloud-base turbulence on activation of cloud condensation nuclei (CCN). Activation of two monodisperse CCN are studied within an adiabatic parcel rising through the cloud base and filled with homogeneous isotropic turbulence. We apply a forced implicit large eddy simulation methodology (Grabowski and Thomas Atmospheric Chemistry and Physics, 2021) within a triply periodic computational domain of (64m)^3. Small CCN are assumed to have a dry radius of 0.01 micron and a corresponding activation (critical) radius and activation supersaturation of 0.6 micron and 1.3%, respectively. Large CCN have a dry radius of 0.2 micron and feature activation radius of 5.4 micron and activation supersaturation 0.15 %. CCN are assumed in 200 cm^-3 concentration in all cases. Mean cloud base updraft velocities of 0.33, 1, and 3 m/s are considered. Turbulence can lead to activation of only a fraction of all CCN and lead to a non-zero droplet spectral width just above the cloud base, of the order of 1 micron, especially in the case of small CCN and weak mean cloud base ascent. The simulations document an important role of cloud base turbulence on cloud base CCN activation. completed datahelp@ucar.edu pointOfContact notPlanned dataset https://gdex.ucar.edu/images/ds_logos/default_200_200.png Logo thumbnail from URL png Binary dataset Resource Type 2021-03-30 revision 4.4 DataCite Metadata Working Group orginator resourceTypeGeneral WRF > Weather Research and Forecasting (WRF) Model U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Platforms EARTH SCIENCE > ATMOSPHERE > AEROSOLS > CLOUD CONDENSATION NUCLEI EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > WIND DYNAMICS > TURBULENCE U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Science and Services Keywords Creative Commons Attribution 4.0 International License None eng utf-8 climatologyMeteorologyAtmosphere NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 117761.594 https://gdex.ucar.edu/datasets/d583148/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d583148/dataaccess/ https Data Access Related Link download none asNeeded