Xing et al. learned the vertical variations and sources of O₃ and HONO and their precursors on the Tibetan Plateau. The authors found that the contributions of HONO and O₃ to the production rates of OH on the TP are even greater than at lower-altitudes areas. This study will enrich the new understanding of vertical distribution of atmospheric components and explained the strong AOC on the TP. From the point of view of the data and scientific value, I recommend this manuscript being published in ACP after following revisions.

1. Authors should reorganize the abstract. The significance of the research and the most significant scientific findings should be fully presented.

2.The description of the retrieval algorithm and the corresponding uncertainty analysis of vertical profiles is missing. The authors could even put them in the supplementary materials.

3.Section 2.1 emphasized HCHO, which seems to be irrelevant to this study. I suggest the authors to modificate Figure S1 to narrow the area and focus on the area around Nam Co.

4.The authors concluded “high concentration NO₂ should be attributed to the transport process from the NOx produced by ice and snow on the top of Mt. Tanggula”. Can you give adequate data and literature support?

1. P6 L194-197, “Moreover, the large-scaled spatial distributions of AOD, O3, NO2 and HCHO over CAS (NAMORS) were monitored by Himawari-8 (Bessho et al., 2016), OMI (Veefkind et al., 2004) and TROPOMI (Griffin et al., 2018; Su et al., 2020), respectively.”

1. P6L202, increases > increased

1. P7L212-213, shown > was, and > but

1. P12L390, first > firstly

Please find the attached comments.