Aim-9h War Thunder

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Alyssa Dipiero

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Aug 3, 2024, 4:48:47 PM8/3/24

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Response: Thanks for suggestion. TPV is defined as a low-pressure system on the 500 hPa geopotential height field but it does not exist alone. Its own development and the eastward moving is also affected by many other systems, such as shear line and Southwest Vortex in the lower troposphere (Chen et al., 2012). Of course, the heavy precipitation in these provinces might be attributed to the multi-system interaction. In our case on July 8-13, 2021, the TPV cloud systems at different development stages were located on the southeast side of the TP, which exhibit closed contours and a cyclonic circulation pattern in wind direction at 500 hPa. The movement of heavy precipitation areas was consistent with the movement of the TPV. Therefore, it was accepted that the TPV was the main influence system. The brightness temperature of FY-4A/AGRI 10.8 m channel (shading, K) with 500 hPa geopotential height (contours,10 gpm) and wind field of ERA5 data at 12:00 on July 8th to 18:00 on July 12th was demonstrated in the figure below.

Response: Thanks for suggestion. There are two reasons for choosing the case of TPV on July 8-13,2021. First, this TPV had a very long life history so that the GPM-DPR could capture more development stages of the cloud system at different geographical regions. Second, most of the TPVs generated on the west part of the TP and disappeared on the east part of the TP. Few of them could move off the TP under favorable circulation conditions and cause large-scale rainstorm, thunderstorm and other disastrous weather processes in the downstream areas. This TPV on July 8-13, 2021 brought heavy precipitation and severe convective weather to many provinces such as Sichuan, Shaanxi, Shanxi, Henan, Beijing-Tianjin-Hebei and Shandong.

Response: Thanks for suggestion. "Shaanxi" and Shanxi" are two different provinces in China, representing the Chinese name of "陕西" and "山西", respectively. The different English spellings were used to distinguish them, which was generally used in other publications. Of course, according to the major comment, the names were added in figures to help better understand the expressions.

Response: Thanks for suggestion. The discussion section was enriched as the discussion of the comparison of our result or methods with other studies, error analysis and etc., according to the suggestion from reviewers. Given that, discussions and conclusions sections were proper separately in the revised version for better viewing the manuscript.

Response: Thanks for suggestion. With the improvement of satellite observation capabilities, satellite data have fostered the researches on Tibetan Plateau vortex (TPV), like TRMM, GPM, and etc. Up to date, the three-dimensional characteristics of precipitation at different development stages of TPV are rarely mentioned. Moreover, most TPVs generated on the west part of the TP and disappeared on the east part of the TP, but few of them can move off the TP under favorable circulation conditions and cause large-scale rainstorm, thunderstorm and other disastrous weather processes in the downstream areas. However, there is still a lack of understanding regarding precipitation characteristics of TPV in a long life history. Therefore, it is important to distill the precipitation characteristics of a TPV in a long life history during its eastward movement at different development stages. These were the importance of the present work.