edu.ucar.opensky::articles:43908 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:45:54.340695 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d79s1wg8 Demonstrating Hierarchical System Development with the Common Community Physics Package Single‐Column Model: A case study over the Southern Great Plains 2025-07-01T00:00:00Z publication https://n2t.net/ark:/85065/d79s1wg8 https://doi.org/10.1002/met.70073 Li, Weiwei author D'Amico, F. author Bernardet, L. author Xue, Lulin author Dudhia, Jimy author Shin, Hyeyum Hailey author Firl, G. author Sun, S. author Harrold, Michelle author Nance, Louisa B. author Ek, Michael B. author Chu, Y. author UCAR/NCAR - Library publisher This study demonstrates a specific application of the hierarchical system development (HSD) approach to investigate, analyze, and attribute model issues within the Unified Forecast System (UFS), with a focus on process isolation. By evaluating a non‐precipitating, shallow cumulus case at the Atmospheric Radiation Measurement Southern Great Plains site in the UFS global forecast against the observation, the investigation identifies a warmer and deeper daytime convective planetary boundary layer (PBL) and misrepresented nocturnal PBL transition. Hypothesis testing, which employs the Common Community Physics Package (CCPP) single‐column model (SCM) and uses the same physics as the UFS global model, confirms that these issues are attributed to the model physics and initialization. Specifically, misrepresented PBL processes are linked to problematic surface condition and a lack of cloud formation, which may stem from deficiencies in PBL and cloud microphysics parameterizations and their interactions. The UFS initial condition contributes to an earlier, excessively collapsed daytime convective boundary layer and a lack of decoupling between the stable boundary layer and residual layer late in the afternoon. This work introduces an avenue for the community to engage with the application of HSD, along with the CCPP and CCPP SCM, to understand the interplay of model physics, disentangle the roles of model components, as well as facilitate model and forecast improvement. 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 University Corporation For Atmospheric Research (UCAR):National Center for Atmospheric Research (NCAR):Research Applications Lab (RAL):Joint Numerical Testbed (JNT) None eng geoscientificInformation