Cloud-Top Supercooled Liquid Droplets in Stratiform Clouds Observed during Winter in Inland Hokkaido, Japan

• Ohigashi Tadayasu

  Institute for Space-Earth Environmental Research, Nagoya University

• Tsuboki Kazuhisa

  Institute for Space-Earth Environmental Research, Nagoya University

• Oue Mariko

  School of Marine and Atmospheric Sciences, Stony Brook University

Abstract

Supercooled liquid droplets (SLDs) not only play important roles in precipitation formation processes but they also affect the radiation budget. Therefore, it is important to clarify the distribution and quantity of SLDs. Hydrometeor videosonde observations were performed in February 2011 at Rikubetsu in inland Hokkaido, Japan. Five hydrometeor videosondes were released in ice precipitations in stratiform clouds and SLDs were detected in three cases. The clouds in these three cases had SLDs at the cloud tops. The microphysical quantities of the SLD layers were within the ranges of those observed in Arctic mixed-phase clouds. The cloud-top SLDs had potential to cause radiative cooling, which contributed to the formation of upward motion generating ice precipitation. Small water vapor amounts above the cloud tops cannot contribute to moisture supply. Vertical profiles of temperature and moisture showed that the SLD layers were decoupled from surface moisture sources. The absence of additional moisture supply was consistent with short lifetimes, compared with persistent Arctic mixed-phase clouds.

Journal

• SOLA

  SOLA 12 (0), 140-145, 2016

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390282680199196288
• NII Article ID: 130005155565
• DOI: 10.2151/sola.2016-030
• ISSN: 13496476
• Web Site: https://www.jstage.jst.go.jp/article/sola/12/0/12_2016-030/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed