SG-WEx: Unified Model output for January 2015 over South Georgia, with island orography included (run: u-ag477)

This dataset contains modelling output from the u-ag477 run of a high-resolution (1.5 km horizontal grid, 118 vertical levels up to around 75 km altitude, 30 s timestep) local-area configuration of the Met Office Unified Model run in a box over the island of South Georgia (54S, 36W), as part of the South Georgia Wave Experiment (SG-WEx) project. This run was for the time period January 2015 with the island orography included. See related dataset for output from a complementary run with a flat orography file for the island for the same time period. These were part of a group of 6 model runs for the SG-WEx project. The aim of the modelling runs was to examine gravity wave generation and deep vertical propagation over this mountainous island. Three model time periods are archived within the SG-WEx dataset collection: January 2015, June 2015 and July 2015, each containing two runs, one including the island's orography and one without. Initial and boundary conditions are supplied by a global forecast to ensure that conditions over the island remain realistic. Meteorological fields such as wind, temperature, pressure etc were outputted and saved in hourly steps. These runs also coincided with radiosonde campaigns launched from the island. Technical details regarding the configuration of these runs is described Vosper (2015, doi:10.1002/qj.2566). Further information and science results can be found in Jackson et al. (2018, doi:10.1175/BAMS-D-16-0151.1) and Hindley (2021, doi:10.5194/acp-2020-465). See online resources linked to this record for further details.本数据集包含英国气象局统一模型（Met Office Unified Model）u-ag477方案的模拟输出结果。该模拟采用高分辨率局地区域配置，水平网格分辨率为1.5 km，垂直分层共计118层，最高可达约75 km，时间步长为30 s，模拟区域为覆盖南乔治亚岛（54°S，36°W）的矩形区域，作为南乔治亚海浪实验（South Georgia Wave Experiment, SG-WEx）项目的组成部分。本次模拟时段为2015年1月，且纳入了该岛的地形数据。可参考关联数据集，获取同期采用平坦地形文件替代该岛地形的互补模拟结果。本次模拟属于SG-WEx项目的6组模型模拟任务之一。本次模拟的核心目标为探究这座多山岛屿上空的重力波生成机制与垂直深传播过程。SG-WEx数据集集群中共归档了3个模拟时段：2015年1月、2015年6月及2015年7月，每个时段均包含两组模拟试验，一组纳入岛屿地形，另一组则不纳入地形数据。模拟的初始场与边界场由全球预报场提供，以确保岛屿周边的气象条件符合实际观测情况。模拟输出了风场、温度场、气压场等多类气象要素，并以每小时为时间步长进行存储。本次模拟时段与该岛同期开展的无线电探空观测活动相契合。关于本次模拟配置的技术细节可参见Vosper(2015, doi:10.1002/qj.2566)的相关研究。更多相关信息与科学研究成果可参阅Jackson等人(2018, doi:10.1175/BAMS-D-16-0151.1)及Hindley(2021, doi:10.5194/acp-2020-465)的相关文献。如需了解更多细节，请查看本数据集记录关联的在线资源。