PALM-LES dataset for evaluating the impact of radiative transfer solvers on shallow cumulus cloud development

This dataset contains output from large-eddy simulations of shallow cumulus clouds, each driven by one of three different radiative transfer solvers. The simulations were performed with the PALM model on a grid with 100 m horizontal and 50 m vertical resolution. After an 11-hour spin-up period, they cover almost one full diurnal cycle, including both daytime and nighttime conditions, with output provided at a temporal resolution of 60 s. The three radiative transfer schemes applied are a conventional 1D delta-Eddington approximation, the fully 3D TenStream solver, and the dynamic TenStream solver, which accelerates 3D radiative transfer calculations by using incomplete solves. Because the simulations are identical except for the radiative transfer method applied, the dataset enables an analysis of how cloud development differs depending on whether 1D or 3D radiative transfer is used, and an assessment of how well the dynamic TenStream solver reproduces key 3D radiative effects.
Access to dataData files are available for download at: https://opendata.physik.lmu.de/np5r3-t5x93

本数据集包含浅积云的大涡模拟（Large-eddy simulations）结果，所有模拟均由三种不同的辐射传输求解器（radiative transfer solvers）之一驱动。模拟采用PALM模型，在水平分辨率100米、垂直分辨率50米的计算网格上进行。经过11小时的自旋初始化阶段后，模拟覆盖了近乎完整的一次日循环，涵盖日间与夜间工况，输出数据的时间分辨率为60秒。
本次采用的三种辐射传输方案分别为：传统一维（1D）Delta-Eddington近似方案、全三维（3D）TenStream求解器，以及动态TenStream求解器——该求解器通过不完全求解策略加速三维（3D）辐射传输计算。
由于所有模拟仅在辐射传输方法上存在差异，其余条件完全一致，本数据集可用于分析使用一维（1D）或三维（3D）辐射传输方案时云发展的差异，同时可评估动态TenStream求解器还原关键三维（3D）辐射效应的效果。
数据获取：数据文件可通过以下链接下载：https://opendata.physik.lmu.de/np5r3-t5x93