Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region
Abstract Atomic hydrogen (H) is crucial for understanding photochemistry and the energy budget in the mesopause region. However, there is still no consensus on the H abundance in this region. This study presents a new hydrogen data set derived from Scanning Imaging Absorption Spectrometer for Atmosp...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-08-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2025GL116311 |
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| _version_ | 1849392650783817728 |
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| author | Xiaolin Wu Yajun Zhu Anne K. Smith Martin Kaufmann Jiyao Xu |
| author_facet | Xiaolin Wu Yajun Zhu Anne K. Smith Martin Kaufmann Jiyao Xu |
| author_sort | Xiaolin Wu |
| collection | DOAJ |
| description | Abstract Atomic hydrogen (H) is crucial for understanding photochemistry and the energy budget in the mesopause region. However, there is still no consensus on the H abundance in this region. This study presents a new hydrogen data set derived from Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) OH(9–6) band spectra, collocated with temperature and ozone profiles from other remote sensing instruments. H number densities peak at 82–87 km and range from 1.5×108 to 4×108 cm−3, depending on season and latitude. Two other H data sets obtained from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) are presented for comparison: those from Mlynczak et al. (2018, https://doi.org/10.1029/2018GL077377) and Panka et al. (2021, https://doi.org/10.1029/2020GL091053) are approximately 30% lower and 50% higher than the SCIAMACHY data at peak altitudes, respectively. Additionally, the H number density retrieved in this study partly shows better agreement with the only direct rocket in situ measurements than those from SABER. |
| format | Article |
| id | doaj-art-7d5617630e17436bba07fbd4bc7dba94 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-7d5617630e17436bba07fbd4bc7dba942025-08-20T03:40:44ZengWileyGeophysical Research Letters0094-82761944-80072025-08-015215n/an/a10.1029/2025GL116311Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause RegionXiaolin Wu0Yajun Zhu1Anne K. Smith2Martin Kaufmann3Jiyao Xu4State Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Beijing ChinaNSF National Center for Atmospheric Research Boulder CO USAInstitute of Climate and Energy Systems ‐ Stratosphere (ICE‐4) Forschungszentrum Jülich Jülich GermanyState Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Beijing ChinaAbstract Atomic hydrogen (H) is crucial for understanding photochemistry and the energy budget in the mesopause region. However, there is still no consensus on the H abundance in this region. This study presents a new hydrogen data set derived from Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) OH(9–6) band spectra, collocated with temperature and ozone profiles from other remote sensing instruments. H number densities peak at 82–87 km and range from 1.5×108 to 4×108 cm−3, depending on season and latitude. Two other H data sets obtained from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) are presented for comparison: those from Mlynczak et al. (2018, https://doi.org/10.1029/2018GL077377) and Panka et al. (2021, https://doi.org/10.1029/2020GL091053) are approximately 30% lower and 50% higher than the SCIAMACHY data at peak altitudes, respectively. Additionally, the H number density retrieved in this study partly shows better agreement with the only direct rocket in situ measurements than those from SABER.https://doi.org/10.1029/2025GL116311 |
| spellingShingle | Xiaolin Wu Yajun Zhu Anne K. Smith Martin Kaufmann Jiyao Xu Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region Geophysical Research Letters |
| title | Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region |
| title_full | Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region |
| title_fullStr | Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region |
| title_full_unstemmed | Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region |
| title_short | Nighttime Atomic Hydrogen Abundance Retrieved From SCIAMACHY Hydroxyl Airglow Measurements in the Mesopause Region |
| title_sort | nighttime atomic hydrogen abundance retrieved from sciamachy hydroxyl airglow measurements in the mesopause region |
| url | https://doi.org/10.1029/2025GL116311 |
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