This paper describes the updates of the line positions and intensities for the carbon dioxide transitions in the 2020 edition of the HITRAN spectroscopic database. The new line list for all 12 naturally abundant isotopologues of carbon dioxide replaces the previous one from the HITRAN2016 edition. This update is primarily motivated by several issues related to deficient HITRAN2016 line positions and intensities that have been identified from laboratory and atmospheric spectra. Critical validation tests for the spectroscopic data were carried out to find problems caused by inaccuracies in CO₂ line parameters. New sources of data were selected for the bands that were deemed problematic in the HITRAN2016 edition. Extra care was taken to retain the consistency in the data sources within the bands. The comparisons with the existing theoretical and semi-empirical databases (including ExoMol, NASA Ames, and CDSD-296) and with available experimental works were carried out. The HITRAN2020 database has been extended by including additional CO₂ bands above 8000 cm⁻¹, and magnetic dipole lines of CO₂ were introduced in HITRAN for the first time by including the ν₂+ν₃ band in the 3.3-µm region. Although the main topic of this article is line positions and intensities, for consistency a recent algorithm for the line-shape parameters proposed in Hashemi et al. JQSRT (2020) was reapplied (after minor revisions) to the line list.

本文描述了 HITRAN 光谱数据库 2020 版中二氧化碳跃迁线位置和强度的更新。所有 12 种天然丰富的二氧化碳同位素的新行列表取代了 HITRAN2016 版中的前一个。此次更新的主要动机是与从实验室和大气光谱中识别出的 HITRAN2016 线位置和强度不足相关的几个问题。对光谱数据进行了关键验证测试，以发现 CO ₂不准确引起的问题线参数。为 HITRAN2016 版本中认为有问题的频段选择了新的数据源。额外注意保持带内数据源的一致性。与现有的理论和半经验数据库（包括 ExoMol、NASA Ames 和 CDSD-296）以及可用的实验工作进行了比较。HITRAN2020 数据库已通过包括8000 cm ^-1以上的额外 CO ₂波段进行了扩展，并且通过包括 ν ₂ +ν ₃首次在 HITRAN 中引入了 CO _{2 的}磁偶极线带在 3.3 µm 区域。尽管本文的主要主题是线的位置和强度，但为了一致性，Hashemi 等人提出的线形参数的最新算法。JQSRT (2020) 被重新应用（经过小修改）到行列表。