Global and diurnal variations in tropospheric ammonia observed from a constellation of hyperspectral infrared sounders in three different LEO orbits

Hua, Jiancong; Zhou, Runyi; Sheng, Mengya; Zeng, Zhao-Cheng

doi:10.5194/amt-19-4013-2026

Articles | Volume 19, issue 12

https://doi.org/10.5194/amt-19-4013-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-19-4013-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 12

Research article

| Highlight paper

|

19 Jun 2026

Research article | Highlight paper |

| 19 Jun 2026

Global and diurnal variations in tropospheric ammonia observed from a constellation of hyperspectral infrared sounders in three different LEO orbits

Jiancong Hua, Runyi Zhou, Mengya Sheng, and Zhao-Cheng Zeng

Supplement

https://doi.org/10.5194/amt-19-4013-2026-supplement

Data sets

FengYun-3F/HIRAS-II FYLeoAIR NH3 retrievals in 2024 Zhao-Cheng Zeng and Jiancong Hua https://doi.org/10.5281/zenodo.18366114

FengYun-3E/HIRAS-II FYLeoAIR NH3 retrievals from January 2023 to December 2024 Zhao-Cheng Zeng and Jiancong Hua https://doi.org/10.5281/zenodo.18359451

FengYun-4B/GIIRS FYGeoAIR NH3 retrievals from July 2022 to June 2025 Zhao-Cheng Zeng https://doi.org/10.5281/zenodo.17193848

Editorial statement

This study establishes a novel integrated satellite constellation that delivers quasi-geostationary–like global coverage, enabling six daily observations of atmospheric NH₃ and substantially improving constraints on its diurnal variability. The framework provides a critical observational basis for more accurate emission quantification and for advancing climate and air quality model parameterizations.