Journal article

Wintertime In Situ Cloud Microphysical Properties of Mixed-Phase Clouds Over the Southern Ocean

Yi Huang, Steven T Siems, Michael J Manton

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | AMER GEOPHYSICAL UNION | Published : 2021

Abstract

In situ observations made over 20 flights during three Austral winters (June to October 2013–2015) were analyzed to characterize the cloud microphysical properties and natural variability of mid-latitude shallow convective clouds over the Southern Ocean (SO), with a focus on pristine conditions and the mixed-phase temperature range (MPTR, 0°C to −31°C). Liquid, mixed-phase, and ice cloud fractions were observed 39%, 44%, and 17% of the time, respectively, under various meteorological settings. Liquid phase clouds were typically characterized by low droplet number concentrations and the common presence of drizzle. Supercooled liquid water was prevalent in the MPTR, while freezing of supercool..

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Grants

Awarded by Australian Research Council


Funding Acknowledgements

This work is supported by an Australian Research Council discovery grant DP190101362 and CE170100023. The research flights were undertaken in cooperation with Hydro Tasmania. The authors thank the cloud seeding team from Hydro Tasmania for their consistent assistance with those research flights.