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Title: Understanding ice cloud-precipitation properties of three modes of mesoscale convective systems during PECAN

Abstract

This study analyzes the precipitation and ice cloud microphysical features of three common modes of linear mesoscale convective systems (MCSs) during the Plains Elevated Convection at Night (PECAN) campaign. Three cases, one for each linear MCS archetype (trailing stratiform (TS), leading stratiform (LS), and parallel stratiform (PS) precipitation), are selected. We focus primarily on analyzing ice cloud microphysical properties and precipitation rates over the classified convective core (CC) and stratiform rain (SR) regions, as well as the two stratiform regions that developed behind (SR1) and ahead (SR2) of the convective line relative to the storm motion. In the three selected cases, the ice water path (IWP) and precipitation rate (PR) have strong correlations in the CC, but not in the SR. In terms of the temporal evolution of the mean IWPs and PRs, both CC and SR IWPs, as well as CC PRs, reach peaks quickly, but take a longer time to dissipate than the increase period. For all three cases, both SR1 and SR2 IWPs are 20-70% of their corresponding CC values in both the LS and PS cases, and up to 95% for the TS case, while all of their PRs are only 7-25% of their CC values.more » These values suggest that the SR PRs may not only depend on IWPs, but also that the microphysical properties of ice particles such as habit and size distribution may play an important role. Utilizing cloud resolving simulations of these systems may provide better understanding of the physical meanings behind the results in the future.« less

Authors:
 [1];  [1];  [1];  [2];  [1];  [2];  [1]
  1. University of Arizona
  2. BATTELLE (PACIFIC NW LAB)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1530829
Report Number(s):
PNNL-SA-142727
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Geophysical Research. D. (Atmospheres)
Additional Journal Information:
Journal Volume: 124; Journal Issue: 7
Country of Publication:
United States
Language:
English

Citation Formats

Cui, Wenjun, Dong, Xiquan, Xi, Baike, Fan, Jiwen, Tian, Jingjing, Wang, Jingyu, and McHardy, Theodore. Understanding ice cloud-precipitation properties of three modes of mesoscale convective systems during PECAN. United States: N. p., 2019. Web. doi:10.1029/2019JD030330.
Cui, Wenjun, Dong, Xiquan, Xi, Baike, Fan, Jiwen, Tian, Jingjing, Wang, Jingyu, & McHardy, Theodore. Understanding ice cloud-precipitation properties of three modes of mesoscale convective systems during PECAN. United States. doi:10.1029/2019JD030330.
Cui, Wenjun, Dong, Xiquan, Xi, Baike, Fan, Jiwen, Tian, Jingjing, Wang, Jingyu, and McHardy, Theodore. Tue . "Understanding ice cloud-precipitation properties of three modes of mesoscale convective systems during PECAN". United States. doi:10.1029/2019JD030330.
@article{osti_1530829,
title = {Understanding ice cloud-precipitation properties of three modes of mesoscale convective systems during PECAN},
author = {Cui, Wenjun and Dong, Xiquan and Xi, Baike and Fan, Jiwen and Tian, Jingjing and Wang, Jingyu and McHardy, Theodore},
abstractNote = {This study analyzes the precipitation and ice cloud microphysical features of three common modes of linear mesoscale convective systems (MCSs) during the Plains Elevated Convection at Night (PECAN) campaign. Three cases, one for each linear MCS archetype (trailing stratiform (TS), leading stratiform (LS), and parallel stratiform (PS) precipitation), are selected. We focus primarily on analyzing ice cloud microphysical properties and precipitation rates over the classified convective core (CC) and stratiform rain (SR) regions, as well as the two stratiform regions that developed behind (SR1) and ahead (SR2) of the convective line relative to the storm motion. In the three selected cases, the ice water path (IWP) and precipitation rate (PR) have strong correlations in the CC, but not in the SR. In terms of the temporal evolution of the mean IWPs and PRs, both CC and SR IWPs, as well as CC PRs, reach peaks quickly, but take a longer time to dissipate than the increase period. For all three cases, both SR1 and SR2 IWPs are 20-70% of their corresponding CC values in both the LS and PS cases, and up to 95% for the TS case, while all of their PRs are only 7-25% of their CC values. These values suggest that the SR PRs may not only depend on IWPs, but also that the microphysical properties of ice particles such as habit and size distribution may play an important role. Utilizing cloud resolving simulations of these systems may provide better understanding of the physical meanings behind the results in the future.},
doi = {10.1029/2019JD030330},
journal = {Journal of Geophysical Research. D. (Atmospheres)},
number = 7,
volume = 124,
place = {United States},
year = {2019},
month = {4}
}