Microphysical Characteristics of Tropical Cyclone Choiwan (2021) Outer Rainbands Derived From Polarimetric Radar Observations on a Research Vessel

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(5)

Published: Feb. 28, 2025

Abstract Microphysical characteristics of tropical cyclones (TCs) over the open ocean remain elusive due to observation constraints. In this study, dual‐polarization observations derived from a ship‐borne C‐band polarimetric radar are utilized investigate microphysical an outer rainband associated with TC Choiwan during its evolution South China Sea 0500 1300 UTC on 3 June 2021. Based and convection intensity, eight‐hour period is categorized into three stages distinct features: pre‐mature, mature post‐mature. During stage, both ice‐phase warm rain processes active, resulting in distribution pattern where most convective cells (CCs) contain high concentrations small raindrops few exhibiting extremely large raindrops, making raindrop size distributions (DSDs) fall between “continental‐like” “maritime‐like”. pre‐mature post‐mature stages, predominantly govern growth CCs displaying DSD characteristics.

Language: Английский

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Study on the characteristics of precipitation particle size distribution during freezing weather in the southwest mountainous areas of China

Science China Earth Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Language: Английский

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Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(8)

Published: April 22, 2025

Abstract Persistent strong winds are a common feature within the near‐surface layer of tropical cyclones, which can induce pronounced horizontal motion as raindrops descend. However, current state‐of‐art microphysics schemes typically only consider vertical raindrops, ultimately failing to accurately simulate collisional outcomes and associated raindrop size distributions (RSDs) under winds. For instance, original bin scheme was unable successfully reproduced evolution RSDs with decreasing height, measured from multi‐layer observations during landfall Typhoon Pakhar (2017). Thus, this study introduces modified that incorporates influence wind speeds, shear smaller‐scale turbulence on total movement velocity (including components) consequently their outcomes. This modification demonstrates remarkable improvement in representation intrinsic variation height strong‐wind conditions.

Language: Английский

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Observational study of microphysical and chemical characteristics of size-resolved fog in different regional backgrounds in China

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 950, P. 175329 - 175329

Published: Aug. 8, 2024

Language: Английский

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