The open time-series of the high-resolution ionosphere-thermosphere aeronomic climate simulation

The OTHITACS project aims to provide a continuous high-resolution simulation of the Earth's ionosphere and thermosphere from 1 January 2000. The ionosphere and thermosphere are important regions of our near-Earth space environment. A better understanding of these regions is useful not only for socio-economic reasons, including the management of space assets, but also for other far-reaching consequences of space weather.

In the experiment, "the physics-based TIE-GCM OTHITACS", we run the thermosphere-ionosphere-electrodynamics general circulation model (TIE-GCM; http://www.hao.ucar.edu/modeling/tgcm) at high resolution using the computing and data resources provided by the Kratos HPDA (high-performance data analysis) cluster at the German Aerospace Center (DLR). We provide 38 diagnostics of the ionosphere-thermosphere system at a cadence of 10 minutes. These diagnostics describe the dominant plasma and neutral structures and the electrodynamics of the ionosphere-thermosphere system.

We are making this unprecedented data set freely available to the aeronomy community to improve climate studies. Some of the phenomena that could be studied with this data set include ionospheric plasma density variability, neutral composition trends, neutral winds, ion drift velocity, equatorial anomaly, and travelling ionospheric/atmospheric disturbances.

OT HITACS 项目旨在从2000年1月1日起提供地球电离层与热层的高分辨率连续模拟。电离层与热层是我们近地空间环境中的关键区域。对这些区域的深入理解不仅对于社会经济原因，包括太空资产的管理具有重要意义，而且对于空间天气的深远影响亦具有至关重要的作用。

在实验中，即基于物理的TIE-GCM OTHITACS，我们利用德国航空航天中心（DLR）Kratos HPDA（高性能数据分析）集群提供的计算和数据资源，以高分辨率运行热层-电离层-电动力学通用环流模型（TIE-GCM；http://www.hao.ucar.edu/modeling/tgcm）。我们以10分钟的时间间隔提供了38项电离层-热层系统的诊断数据。这些诊断数据描述了占主导地位的等离子体和中性结构，以及电离层-热层系统的电动力学特性。

我们将这一前所未有的数据集免费提供给大气学社区，以提升气候学研究。利用这一数据集可以进行的研究现象包括电离层等离子体密度变化、中性组分趋势、中性风、离子漂移速度、赤道异常以及电离层/大气扰动等。