Preprints
https://doi.org/10.5194/acp-2021-727
https://doi.org/10.5194/acp-2021-727

  30 Aug 2021

30 Aug 2021

Review status: this preprint is currently under review for the journal ACP.

Distinct impacts on precipitation by aerosol radiative effect over three different megacity regions of eastern China

Yue Sun and Chuanfeng Zhao Yue Sun and Chuanfeng Zhao
  • College of Global Change and Earth System Science, and State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China

Abstract. Many studies have investigated the impacts of aerosol on the intensity and amount of precipitation, but few have been done regarding the impacts of aerosol on the start and peak time of precipitation. Using the high-resolution precipitation, aerosol and meteorological data in warm season of June–August from 2015 to 2020, this study investigates the influence of aerosol on the start and peak time of precipitation over three different regions, the North China Plain (NCP), the Yangtze River Delta (YRD), and the Pearl River Delta (PRD). It shows that the period with the most occurrence frequency of precipitation start time, defined as the frequent period (FP) of precipitation start time, is delayed and prolonged by aerosols in NCP, contributing to the similar durations of precipitation in NCP, YRD, and PRD. This study also shows that different types of aerosol (absorbing versus scattering) have caused different influences on the start and peak time of precipitation over the three study regions. The precipitation start time is 3 hours advanced in NCP but 2 hours delayed in PRD by aerosols during precipitation FP, and shows no response to aerosol in YRD. Compared to stratiform precipitation, the convective precipitation is more sensitive to aerosol. The start and peak time of convective precipitation show similar response to aerosols. This study further shows that the aerosol impact on precipitation can vary with meteorological conditions. Humidity is beneficial to precipitation, which can advance the precipitation start and peak time and prolong the precipitation duration time. Correspondingly, the impacts of aerosol on start time of precipitation are significant under low humidity or weak low tropospheric stability condition. The impacts of vertical wind shear (WS) on the start and peak time of precipitation are contrary to that of aerosols, resulting in the fact that WS inhibits the aerosol effects on precipitation.

Yue Sun and Chuanfeng Zhao

Status: open (until 11 Oct 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-727', Anonymous Referee #1, 13 Sep 2021 reply
  • RC2: 'Comment on acp-2021-727', Anonymous Referee #2, 14 Sep 2021 reply

Yue Sun and Chuanfeng Zhao

Yue Sun and Chuanfeng Zhao

Viewed

Total article views: 272 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
211 55 6 272 17 3 4
  • HTML: 211
  • PDF: 55
  • XML: 6
  • Total: 272
  • Supplement: 17
  • BibTeX: 3
  • EndNote: 4
Views and downloads (calculated since 30 Aug 2021)
Cumulative views and downloads (calculated since 30 Aug 2021)

Viewed (geographical distribution)

Total article views: 278 (including HTML, PDF, and XML) Thereof 278 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 19 Sep 2021
Download
Short summary
Using high-resolution multi-year warm season data, this study investigates the influence of aerosol on precipitation time over North China Plain (NCP), Yangtze River Delta (YRD), and Pearl River Delta (PRD). Aerosol amount and type have significant influences on precipitation time: The precipitation start time is 3 hours advanced in NCP, 2 hours delayed in PRD, and negligible changed in YRD. Aerosol impact on precipitation is also influenced by precipitation type and meteorological conditions.
Altmetrics