Remote-sensing data from lunar orbiters have revealed spectral features consistent with the presence of OH or H₂O on the lunar surface. Analyses of data from the Moon Mineralogy Mapper spectrometer onboard the Chandrayaan-1 spacecraft have suggested that OH/H₂O is recycled on diurnal timescales and persists only at high latitudes. However, the spatial distribution and temporal variability of the OH/H₂O, as well as its source, remain uncertain. Here we incorporate a physics-based thermal correction into analysis of reflectance spectra from the Moon Mineralogy Mapper and find that prominent absorption features consistent with OH/H₂O can be present at all latitudes, local times and surface types examined. This suggests the widespread presence of OH/H₂O on the lunar surface without significant diurnal migration. We suggest that the spectra are consistent with the production of OH in space-weathered materials by the solar wind implantation of H⁺ and formation of OH at crystal defect sites, as opposed to H₂O sourced from the lunar interior. Regardless of the specific composition or formation mechanism, we conclude that OH/H₂O can be present on the Moon under thermal conditions more wide-ranging than previously recognized.

来自月球轨道器的遥感数据揭示了与月球表面上存在OH或H ₂ O一致的光谱特征。对Chandrayaan-1航天器上的Moon Mineralogy Mapper光谱仪进行的数据分析表明，OH / H ₂ O在昼夜时间尺度上被回收，并且仅在高纬度地区持续存在。然而，OH / H ₂ O的空间分布和时间变异性及其来源仍然不确定。在这里，我们将基于物理学的热校正方法整合到了Moon Mineralogy Mapper的反射光谱分析中，发现与OH / H ₂一致的突出吸收特征在所检查的所有纬度，当地时间和地表类型中都可以存在O。这表明在月球表面普遍存在OH / H ₂ O，而没有明显的日间迁移。我们认为，该光谱与通过太阳风注入H ⁺以及在晶体缺陷部位形成OH而在空间风化材料中生成OH相一致，这与从月球内部获取的H ₂ O相反。不管具体的组成或形成机理如何，我们得出的结论是，OH / H ₂ O可以在比以前公认的范围更广的热条件下存在于月球上。