Preprints
https://doi.org/10.5194/egusphere-2023-2183
https://doi.org/10.5194/egusphere-2023-2183
16 Nov 2023
 | 16 Nov 2023

The characteristics of cloud macro parameters caused by seeder-feeder inside clouds measured by millimeter-wave cloud radar in Xi'an

Huige Di and Yun Yuan

Abstract. The seeding effect of upper clouds on lower clouds affects the evolution of clouds, especially the seeding from upper ice clouds on lower stratiform clouds or convective clouds, which can stimulate the precipitation of lower clouds and even produce extreme precipitation. Because when seeders of seeding cloud enter the feeding cloud, the interaction between cloud particles results in the change of macro and micro parameters of the feeding cloud. Based on the observation data of the ground-based Ka-band millimeter-wave cloud radar (MMCR) and microwave radiometer (MWR) in spring and autumn from 2020 to 2022, the seeder-feeder phenomenon among double-layer clouds in China Xi'an was studied. The study on 11cases of seeder-feeder processes shows that the processes can be divided into three categories by defining the height difference (HD) between the seeding cloud base and the feeding cloud top, and the effective seeding depth (ESD). Through the analysis on the reflectivity factor and the radial velocity of cloud particles detected by MMCR and on the retrieved cloud dynamics parameters (vertical velocity of airflow and falling velocity of cloud particles), it is shown that the reflectivity factor in the cloud are significantly enhanced during the seeder-feeder period for the three types of processes. But there are different enhancements among the reflectivity factor profiles for the three seeder-feeder processes. The results also showed the limited depth as seeders entering the top of the feeding cloud. The lower and thinner the HD height was, the lower and thicker the ESD height was. On the contrary, the higher the HD height, the higher and thinner the ESD height.

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Huige Di and Yun Yuan

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-2183', Anonymous Referee #1, 28 Nov 2023
  • CC1: 'Comment on egusphere-2023-2183', Aoqi Zhang, 14 Jan 2024
    • CC2: 'Reply on CC1', Huige Di, 16 Jan 2024
  • CC3: 'Comment on egusphere-2023-2183', Huige Di, 19 Jan 2024
  • CC4: 'Comment on egusphere-2023-2183', Yan Yin, 17 Feb 2024
    • CC5: 'Reply on CC4', Huige Di, 01 Mar 2024
    • CC6: 'Reply on CC4', Huige Di, 01 Mar 2024
  • RC3: 'Comment on egusphere-2023-2183', Anonymous Referee #3, 09 Mar 2024

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-2183', Anonymous Referee #1, 28 Nov 2023
  • CC1: 'Comment on egusphere-2023-2183', Aoqi Zhang, 14 Jan 2024
    • CC2: 'Reply on CC1', Huige Di, 16 Jan 2024
  • CC3: 'Comment on egusphere-2023-2183', Huige Di, 19 Jan 2024
  • CC4: 'Comment on egusphere-2023-2183', Yan Yin, 17 Feb 2024
    • CC5: 'Reply on CC4', Huige Di, 01 Mar 2024
    • CC6: 'Reply on CC4', Huige Di, 01 Mar 2024
  • RC3: 'Comment on egusphere-2023-2183', Anonymous Referee #3, 09 Mar 2024
Huige Di and Yun Yuan
Huige Di and Yun Yuan

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Short summary
Based on the observation data of the ground-based Ka-band millimeter-wave cloud radar (MMCR) and microwave radiometer in spring and autumn from 2020 to 2022, the seeder-feeder phenomenon among double-layer clouds in China Xi'an was studied. Through the analysis on the reflectivity factor and the radial velocity of cloud particles detected by MMCR and on the retrieved cloud dynamics parameters, it is shown that the reflectivity factor in the cloud are significantly enhanced.