Liquid–Ice mass partition in tropical maritime convective clouds

AMS Citation:
Yang, J., Z. Wang, A. Heymsfield, and T. Luo, 2016: Liquid–Ice mass partition in tropical maritime convective clouds. Journal of the Atmospheric Sciences, 73, 4959-4978, doi:10.1175/JAS-D-15-0145.1.
Date:2016-12-01
Resource Type:article
Title:Liquid–Ice mass partition in tropical maritime convective clouds
Abstract: The liquid ice mass partitioning in tropical maritime convective clouds is studied using data collected by the National Center for Atmospheric Research C-130 research aircraft during the Ice in Clouds Experiment Tropical project. The clouds investigated by the C-130 in this study generally contained weak to moderate updrafts. The liquid water content (LWC) is calculated using a combination of hot-wire and imaging probes. The total condensed water content (CWC) is measured by a counterfiow virtual impactor. The ice water content (IWC) is calculated as CWC minus LWC. Taking into account potential significant measurement uncertainties, the liquid fraction [i.e., LWC/(LWC + IWC)] between 0 and -15 degrees C appears to decrease by a factor of about 3 in updrafts near (<500 m) cloud top and a factor of 2 in updrafts far below (>500 m) cloud top. The decrease in liquid fraction as a function of temperature is also correlated with cloud life cycle. In dissipating clouds, ice dominates in all temperature ranges. A comparison between this study and two parameterizations shows that at different geographic locations the liquid fraction in convective clouds differs. Because of the sampling bias and the limitations of instruments, more measurements, especially with more advanced instruments, are needed in the future.
Peer Review:Refereed
Copyright Information:Copyright 2016 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work.
OpenSky citable URL: ark:/85065/d70p11s4
Publisher's Version: 10.1175/JAS-D-15-0145.1
Author(s):
  • Jing Yang
  • Zhien Wang
  • Andrew Heymsfield - NCAR/UCAR
  • Tao Luo
  • Random Profile

    ASSOC SCIENTIST II

    Recent & Upcoming Visitors