skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Lower-Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events

Abstract

The sensitivity of stratospheric polar vortex variability to the basic-state stratospheric temperature profile is investigated by performing a parameter sweep experiment with a dry dynamical core general circulation model where the equilibrium temperature profiles in the polar lower and upper stratosphere are systematically varied. It is found that stratospheric variability is more sensitive to the temperature distribution in the lower stratosphere than in the upper stratosphere. In particular, a cold lower stratosphere favors a strong time-mean polar vortex with a large daily variability, promoting frequent sudden stratospheric warming events in the model runs forced with both wavenumber-1 and wavenumber-2 topographies. This sensitivity is explained by the control exerted by the lower-stratospheric basic state onto fluxes of planetary-scale wave activity from the troposphere to the stratosphere, confirming that the lower stratosphere can act like a valve for the upward propagation of wave activity. It is further shown that with optimal model parameters, stratospheric polar vortex climatology and variability mimicking Southern and Northern Hemisphere conditions are obtained with both wavenumber-1 and wavenumber-2 topographies.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Univ. of Tokyo (Japan)
  2. Univ. of California, Los Angeles, CA (United States)
  3. Seoul National Univ. (Korea, Republic of)
  4. Kongju National Univ., Gongju (Korea, Republic of)
Publication Date:
Research Org.:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1537323
Alternate Identifier(s):
OSTI ID: 1430571
Grant/Contract Number:  
SC0016117
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research: Atmospheres
Additional Journal Information:
Journal Volume: 123; Journal Issue: 6; Journal ID: ISSN 2169-897X
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Meteorology & Atmospheric Sciences

Citation Formats

Martineau, Patrick, Chen, Gang, Son, Seok-Woo, and Kim, Joowan. Lower-Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events. United States: N. p., 2018. Web. doi:10.1002/2017jd027648.
Martineau, Patrick, Chen, Gang, Son, Seok-Woo, & Kim, Joowan. Lower-Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events. United States. doi:10.1002/2017jd027648.
Martineau, Patrick, Chen, Gang, Son, Seok-Woo, and Kim, Joowan. Wed . "Lower-Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events". United States. doi:10.1002/2017jd027648. https://www.osti.gov/servlets/purl/1537323.
@article{osti_1537323,
title = {Lower-Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events},
author = {Martineau, Patrick and Chen, Gang and Son, Seok-Woo and Kim, Joowan},
abstractNote = {The sensitivity of stratospheric polar vortex variability to the basic-state stratospheric temperature profile is investigated by performing a parameter sweep experiment with a dry dynamical core general circulation model where the equilibrium temperature profiles in the polar lower and upper stratosphere are systematically varied. It is found that stratospheric variability is more sensitive to the temperature distribution in the lower stratosphere than in the upper stratosphere. In particular, a cold lower stratosphere favors a strong time-mean polar vortex with a large daily variability, promoting frequent sudden stratospheric warming events in the model runs forced with both wavenumber-1 and wavenumber-2 topographies. This sensitivity is explained by the control exerted by the lower-stratospheric basic state onto fluxes of planetary-scale wave activity from the troposphere to the stratosphere, confirming that the lower stratosphere can act like a valve for the upward propagation of wave activity. It is further shown that with optimal model parameters, stratospheric polar vortex climatology and variability mimicking Southern and Northern Hemisphere conditions are obtained with both wavenumber-1 and wavenumber-2 topographies.},
doi = {10.1002/2017jd027648},
journal = {Journal of Geophysical Research: Atmospheres},
number = 6,
volume = 123,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share: