23 Feb 2022
23 Feb 2022
Status: this preprint is currently under review for the journal HESS.

Statistical characteristics of raindrop size distribution during rainy seasons in Complicated Mountain Terrain

Wenqian Mao1,2,3, Wenyu Zhang1,2,3, and Menggang Kou1 Wenqian Mao et al.
  • 1School of Geoscience and Technology, Zhengzhou University, Zhengzhou, 450001, China
  • 2Key Laboratory for Cloud Physics, Chinese Academy of Meteorological Sciences, Beijing 100081, China
  • 3College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China

Abstract. In order to understand the differences of raindrop size distribution (DSD) in complex mountainous terrain, the characteristics of DSD were analyzed by using the six-months observation data at the southern slopes, northern slopes and inside in Qilian Mountains. For all rainfall events, the number concentration of small and large raindrops on the inside and south slope are greater than that on the north slope, but midsize raindrops are less. The DSD spectrum of inside mountains are more variable and significantly differ from the north slopes. The differences in normalized intercept parameters of DSD for stratiform and convective rainfall are 8.3 % and 10.4 %, respectively, and mass-weighted diameters are 10.0 % and 23.4 %, respectively, which the standard deviation of DSD parameters on inside stations are larger. The differences in coefficient and exponent of Z-R relationship are 2.5 % and 10.7 %, respectively, with an increasing value of coefficient from the south slope to the north slope in stratiform rainfall but opposite to convective rainfall. In addition, the DSD characteristics and Z-R relationships are more similar at the ipsilateral stations and have smaller differences between the south slope and inside mountains.

Wenqian Mao et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on hess-2022-66', Anonymous Referee #1, 10 Mar 2022
  • RC2: 'Comment on hess-2022-66', Anonymous Referee #2, 14 Apr 2022
  • RC3: 'Comment on hess-2022-66', Anonymous Referee #3, 30 May 2022

Wenqian Mao et al.

Wenqian Mao et al.


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Short summary
DSD characteristics significantly vary to reflect microphysical characteristics. We choose Qilian mountains and select 6 sites representing southern, northern slopes and inside. To thoroughly investigate discrepancies, DSD characteristics and Z-R relationships are analyzed based on continuous observations in rainy season. The goal is to obtain the finer precipitation of mountains and improve the accuracy of QPE, which would contribute to developing cloud water resources in mountainous areas.