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:
-
- Hebrew Univ. of Jerusalem (Israel). Dept. of Atmospheric Sciences
- 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:
- 54 ENVIRONMENTAL SCIENCES; 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. https://doi.org/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. https://doi.org/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 = {Thu May 17 00:00:00 EDT 2018},
month = {Thu May 17 00:00:00 EDT 2018}
}
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