Raindrop size distribution variability associated with size‐dependent advection in convective precipitation systems

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書誌事項

タイトル別名
  • Raindrop size distribution variability associated with size-dependent advection in convective precipitation systems
公開日
2025-01
資源種別
journal article
権利情報
  • © 2025 The Author(s). Atmospheric Science Letters published by John Wiley & Sons Ltd on behalf of Royal Meteorological Society.
  • This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
DOI
  • 10.1002/asl.1286
公開者
Wiley

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説明

Raindrop size distribution (DSD) is fundamental for understanding precipitation processes. This study utilized a two-dimensional simulation with bin cloud microphysics parameterizations to investigate the spatiotemporal variability of DSDs owing to the influence of mesoscale circulation associated with the precipitation system. The simulated multicellular convection went through developing, mature, and dissipating stages, with updraft weakening and rainfall area expanding through these stages. The width of the DSD narrowed as rainfall weakened. In addition, a significant bimodal DSD was observed during the dissipating stage. Furthermore, we investigated the spatial distribution of the number density of raindrops corresponding to the maximum, local minimum, and local maximum of the significant bimodal DSD in the dissipating stage. According to the results, the raindrops constituting the maximum, local minimum, and local maximum followed different advection processes. This size-dependent advection effect may have contributed to the bimodal DSD formation.

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