Mars atmosphere reanalyses during the MY34 Global Dust Storm produced by assimilation of ExoMars TGO-ACS-TIRVIM observations into the Mars PCM using the LETKF

This dataset contains files supporting the results in the paper "Assimilation of temperatures and column dust opacities measured by ExoMars TGO-ACS-TIRVIM during the MY34 Global Dust Storm" by R. M. B. Young et al. Each file is a sequence of 577 complete atmospheric states for Mars' atmosphere during Mars Year 34 between L_s = 182.3 - 211.4°, with 12 states per sol. These were created by assimilating observations from ExoMars TGO-ACS-TIRVIM into the Mars PCM (formerly the LMD Mars GCM) using the LETKF, as described in the paper. Each atmospheric state is the mean of an ensemble of 36 model states. The dataset includes analysis means for the TuTD, TuT-CuD, and TuTD-CuD cases presented in the paper, and the GCM ensemble mean used for comparison. The files are in netCDF-4/HDF5 format. The file structure and variable names are (in most respects) based on the diagfi.nc output file produced by the Mars PCM. The user is referred to Section 6.3.2 of the Mars PCM User Manual for full details of this file. A few of the variable names are changed, and a large number of diagnostic variables related to aerosols have been added in post-processing. Where appropriate, CF-compliant (https://cfconventions.org/) variable names have been added using the attribute <em>standard_name</em>. Units are in CF-compliant form using the attribute <em>units</em>. The file DATASET_DESCRIPTION.pdf contains full details.

本数据集包含支撑R. M. B. Young等人发表的论文《ExoMars TGO-ACS-TIRVIM在火星第34年全球沙尘暴期间测得的温度与柱尘埃不透明度的同化研究》（"Assimilation of temperatures and column dust opacities measured by ExoMars TGO-ACS-TIRVIM during the MY34 Global Dust Storm"）相关结果的配套数据文件。每个文件包含577组完整的火星大气状态序列，对应火星年34（MY34）中太阳经度Ls=182.3°至211.4°的时段，每个火星日（sol）包含12组大气状态。该数据集通过局部集合变换卡尔曼滤波（LETKF），将ExoMars TGO-ACS-TIRVIM的观测数据同化至火星PCM（前身为LMD火星全球环流模式（GCM））生成，具体方法详见该论文。每组大气状态为36个模式状态的集合平均值。数据集包含论文中TuTD、TuT-CuD、TuTD-CuD三种案例的分析平均值，以及用于对比的GCM集合平均值。数据文件采用netCDF-4/HDF5格式。文件结构与变量名在多数方面基于火星PCM生成的diagfi.nc输出文件，用户可参考《火星PCM用户手册》第6.3.2节以了解该文件格式的完整细节。少数变量名有所调整，且后处理阶段新增了大量与气溶胶相关的诊断变量。在合适场景下，已通过<em>standard_name</em>属性添加符合CF公约（https://cfconventions.org/）的变量名；单位采用符合CF公约的规范形式，通过<em>units</em>属性指定。文件DATASET_DESCRIPTION.pdf包含本数据集的完整细节说明。