"Halo Region around Shallow Cumulus Clouds in Large Eddy Simulations"

This dataset is used to examine the halo regions around shallow cumulus clouds. We performed large eddy simulations of shallow cumulus clouds based on the Barbados Oceanographic and Meteorological Experiment (BOMEX) using Met Office-NERC (National Environment Research Concil) Cloud model (MONC). A set of simulations with different model resolutions is performed. The available horizontal grid spacings are 10 m, 25 m, 50 m and 100 m and the corresponding vertical resolutions are 10 m, 25 m, 25 m, and 40 m, respectively. All simulations have the same model top, that is, 3 km. To save the computational cost, we use the same horizontal grid boxes (600 X 600). To test the robustness, we perform sensitivity simulations with modified mixing length scales in the sub-grid scale turbulence scheme. We also perform large eddy simulations using another numerical model, Cloud Model 1 (CM1) to check if the results are sensitive to the numerical details (advection schemes) and domain size. The simulations with CM1 have the same model resolution configurations as in MONC, but they have the same domain size (7.2 X 7.2 X 3)km^3. For more details of the simulation set up, please refer to our submitted paper. As the whole simulation has a huge dataset, we only choose part of the results that can reproduce the figures in our submitted paper for repository.

本数据集用于研究浅积云周边的云晕区域。我们基于巴巴多斯海洋与气象实验（Barbados Oceanographic and Meteorological Experiment, BOMEX），采用英国气象局-国家环境研究委员会云模式（Met Office-NERC Cloud model, MONC）开展了浅积云的大涡模拟。本研究设置了一组不同模式分辨率的模拟试验，可用水平网格间距分别为10米、25米、50米与100米，对应的垂直分辨率依次为10米、25米、25米及40米。所有模拟的模式顶高度统一为3千米。为节约计算成本，我们采用了相同的水平网格格点配置（600×600）。为验证结果的鲁棒性，我们在次网格尺度湍流参数化方案中修改了混合长度尺度，开展了敏感性模拟试验。此外，我们还使用另一款数值模式——云模式1（Cloud Model 1, CM1）开展大涡模拟，以检验结果是否对数值细节（平流方案）与区域尺寸敏感。采用CM1的模拟试验，其模式分辨率配置与MONC一致，但区域尺寸统一为(7.2×7.2×3) km³。关于模拟设置的更多细节，请参阅我们已投稿的学术论文。由于整套模拟数据集体量庞大，我们仅选取了可复现已投稿论文中图表的部分结果存入数据集仓库。