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Comment to “Impacts of aerosol-radiation and aerosol-cloud interactions on a short-term heavy rainfall event - A case study in the Guanzhong Basin, China” by Bei et al.

This study investigates the impacts of aerosol-radiation and aerosol-cloud interactions on a short-term heavy rainfall event occurred in the Guanzhong Basin of central China using a cloud-resolving fully-coupled Weather Research and Forecasting model with Chemistry, with interesting findings. Particularly, the synergetic effect consistently decreases the precipitation in the whole domain with increasing aerosols, but ARIs play a more important role in the decreasing trend of the precipitation with deterioration of PM pollution. Personally, I think this study is worthy for publication with necessary modifications.

Line 48-53, Actually, it is also related to the relative location of aerosol and cloud vertical locations.

Line 54-57, Supporting references should be provided, with Zhao et al. (2018, doi: 10.1002/2017EA000346) as suggested.

Line 80-82, Why do previous studies focus on the mountain regions?

Line 87-90, Are there other similar studies regarding the synergetic effects of ARIs and ACIs over this region? If there are, a short introduction along with their findings are appreciated.

Line 100-105, Why one-way instead of two-way nested grids are used?

Line 110-114, How long for the spin-up?

Line 162-164, For these discrepancies, how do the authors explain them or how would they affect the study results?

Line 205, “Increased anthropogenic emissions …”

Line 265-267, Actually, various studies have shown different results. While invigoration effects of clouds and enhancement of precipitation are found by many studies, a recent study has shown the vertical dependency of precipitation response to aerosols (Sun et al. 2023, doi: 10.1029/2022GL102186) – only precipitation relatively close to cloud bases are enhanced by the invigoration effect. In another word, evaporation effect could also play a role, which should be discussed.