edu.ucar.opensky::articles:24017 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T06:38:12.046108 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7bv7m0z https://doi.org/10.5065/D64J0CZS https Related Dataset #1 SOCRATES: NCAR HCR radar and HSRL lidar moments data. Version 3.2 https://doi.org/10.5065/D6D7998S https Related Dataset #2 SOCRATES: NCAR HCR radar time series data. Version 1.0 https://doi.org/10.5065/D6M32TM9 https Related Dataset #3 SOCRATES: Low Rate (LRT - 1 sps) Navigation, State Parameter, and Microphysics Flight-Level Data. Version 1.3 https://doi.org/10.5065/D6QZ28SG https Related Dataset #4 NCAR/EOL Quality Controlled Dropsonde Data. Version 1.1 Phase characterization of cold sector southern ocean cloud tops: Results from SOCRATES 2020-12-27T00:00:00Z publication https://n2t.org/ark:/85065/d7bv7m0z https://doi.org/10.1029/2020JD033673 Zaremba, T. J. author Rauber, R. M. author McFarquhar, G. M. author Hayman, Matthew author Finlon, J. A. author Stechman, D. M. author UCAR/NCAR - Library publisher For a given cloud, whether the cloud top is predominately made up of ice crystals or supercooled liquid droplets plays a large role in the clouds overall radiative effects. This study uses collocated airborne radar, lidar, and thermodynamic data from 12 high-altitude flight legs during the Southern Ocean Clouds, Radiation, Aerosol Transport Experimental Study (SOCRATES) to characterize Southern Ocean (SO) cold sector cloud top phase (i.e., within 96 m of top) as a function of cloud top temperature (CTT). A training data set was developed to create probabilistic phase classifications based on High Spectral Resolution Lidar data and Cloud Radar data. These classifications were then used to identify dominant cloud top phase. Case studies are presented illustrating examples of supercooled liquid water at cloud top at different CTT ranges over the SO (-3 degrees C < CTTs < -28 degrees C). During SOCRATES, 67.4% of sampled cloud top had CTTs less than 0 degrees C. Of the subfreezing cloud tops sampled, 91.7% had supercooled liquid water present in the top 96 m and 74.9% were classified entirely as liquid-bearing. Liquid-bearing cloud tops were found at CTTs as cold as -30 degrees C. Horizontal cloud extent was also determined as a function of median cloud top height. 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 2020 American Geophysical Union. None eng geoscientificInformation