FengYun-4B/GIIRS FYGeoAIR NH3 retrievals from July 2022 to June 2026 [Four Years]
收藏资源简介：
This dataset contains tropospheric ammonia retrieval data observed by the Geostationary Interferometric Infrared Sounder (GIIRS) on board China’s FengYun-4B satellite, which was launched in 2021. The datasets include NH3 column estimates, the uncertainty, and the column averaging kernel (AK) information. The spatial resolution is 2km and temporal resolution 2-hour covering both day and night. The data have been pre-filtered to ensure the high data quality. The nighttime data should be used with caution due to their low thermal contrast, which may lead to high retrieval uncertainty. Prior to using this dataset, please reach out to the project lead Zhao-Cheng Zeng (zczeng@pku.edu.cn) for more detailed information. A Python code for reading and plotting the data is also available. Data access [Zenodo]: https://doi.org/10.5281/zenodo.22843172 [1] Algorithm reference: Zeng, Z.-C., Lee, L., Qi, C., Clarisse, L., and Van Damme, M.: Optimal estimation retrieval of tropospheric ammonia from the Geostationary Interferometric Infrared Sounder on board FengYun-4B, Atmos. Meas. Tech., 16, 3693–3713, https://doi.org/10.5194/amt-16-3693-2023, 2023. [2] Validation reference: Sheng, M., Zhou, R., Hua, J., Han, S., Zhang, L., Wang, W., Dang, R., Cao, H., Chen, Z., Gu, Y., Liu, M., Lee, L., Qi, C., Han, C., Shephard, M. W., Guendouz, N., Viatte, C., Clarisse, L., Van Damme, M., Clerbaux, C., and Zeng, Z.-C.* (2026): Geostationary observations of atmospheric ammonia over East Asia: spatio-temporal variations revealed by three years of FY-4B/GIIRS measurements, Atmopheric Chemistry and Physics, https://doi.org/10.5194/acp-26-7803-2026, 2026. Please visit project website for future updates: https://fengyunair.github.io/ Notes: Data for Feb 2024 are not available due to special FY-4B/GIIRS operation. FY-4B was maneuvered from 133°E to 105°E between 1 February and 5 March 2024.
