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Title: Relationship between Aerosols, Hail Microphysics, and Z DR Columns

Abstract

Mechanisms of formation of differential reflectivity columns are investigated in simulations of a midlatitude summertime hailstorm with hailstones up to several centimeters in diameter. Simulations are performed using a new version of the Hebrew University Cloud Model (HUCM) with spectral bin microphysics. A polarimetric radar forward operator is used to calculate radar reflectivity and differential reflectivity ZDR. It is shown that ZDR columns are associated with raindrops and with hail particles growing in a wet growth regime within convective updrafts. The height and volume of ZDR columns increases with an increase in aerosol concentration. Small hail forming under clean conditions grows in updrafts largely in a dry growth regime corresponding to low ZDR. Characteristics of ZDR columns are highly correlated with vertical velocity, hail size, and aerosol concentration.

Authors:
 [1];  [1];  [2];  [2]
  1. Hebrew Univ. of Jerusalem (Israel). Dept. of Atmospheric Sciences
  2. National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States); Univ. of Oklahoma, Norman, OK (United States). Cooperative Inst. for Mesoscale Meteorological Studies
Publication Date:
Research Org.:
Univ. of Oklahoma, Norman, OK (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1541821
Grant/Contract Number:  
SC0014295
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Atmospheric Sciences
Additional Journal Information:
Journal Volume: 75; Journal Issue: 6; Journal ID: ISSN 0022-4928
Publisher:
American Meteorological Society
Country of Publication:
United States
Language:
English
Subject:
Meteorology & Atmospheric Sciences

Citation Formats

Ilotoviz, E., Khain, A., Ryzhkov, Alexander V., and Snyder, Jeffrey C. Relationship between Aerosols, Hail Microphysics, and Z DR Columns. United States: N. p., 2018. Web. doi:10.1175/jas-d-17-0127.1.
Ilotoviz, E., Khain, A., Ryzhkov, Alexander V., & Snyder, Jeffrey C. Relationship between Aerosols, Hail Microphysics, and Z DR Columns. United States. doi:10.1175/jas-d-17-0127.1.
Ilotoviz, E., Khain, A., Ryzhkov, Alexander V., and Snyder, Jeffrey C. Thu . "Relationship between Aerosols, Hail Microphysics, and Z DR Columns". United States. doi:10.1175/jas-d-17-0127.1. https://www.osti.gov/servlets/purl/1541821.
@article{osti_1541821,
title = {Relationship between Aerosols, Hail Microphysics, and Z DR Columns},
author = {Ilotoviz, E. and Khain, A. and Ryzhkov, Alexander V. and Snyder, Jeffrey C.},
abstractNote = {Mechanisms of formation of differential reflectivity columns are investigated in simulations of a midlatitude summertime hailstorm with hailstones up to several centimeters in diameter. Simulations are performed using a new version of the Hebrew University Cloud Model (HUCM) with spectral bin microphysics. A polarimetric radar forward operator is used to calculate radar reflectivity and differential reflectivity ZDR. It is shown that ZDR columns are associated with raindrops and with hail particles growing in a wet growth regime within convective updrafts. The height and volume of ZDR columns increases with an increase in aerosol concentration. Small hail forming under clean conditions grows in updrafts largely in a dry growth regime corresponding to low ZDR. Characteristics of ZDR columns are highly correlated with vertical velocity, hail size, and aerosol concentration.},
doi = {10.1175/jas-d-17-0127.1},
journal = {Journal of the Atmospheric Sciences},
number = 6,
volume = 75,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
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