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Cited by 107Climate variability and modelsMeteorological Phenomena and SimulationsAtmospheric aerosols and clouds

Enhanced MJO-like Variability at High SST

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Arnold, Nathan P., Kuang, Zhiming, Tziperman, Eli·2013·Journal of Climate
DOI 10.1175/jcli-d-12-00272.1
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Abstract

The authors report a significant increase in Madden–Julian oscillation (MJO)–like variability in a superparameterized version of the NCAR Community Atmosphere Model run with high sea surface temperatures (SSTs). A series of aquaplanet simulations exhibit a tripling of intraseasonal outgoing longwave radiation variance as equatorial SST is increased from 26° to 35°C. The simulated intraseasonal variability also transitions from an episodic phenomenon to one with a semiregular period of 25 days. Moist static energy (MSE) budgets of composite MJO events are used to diagnose the physical processes responsible for the relationship with SST. This analysis points to an increasingly positive contribution from vertical advection, associated in part with a steepening of the mean vertical MSE profile in the lower troposphere. The change in MSE profile is a natural consequence of increasing SST while maintaining a moist adiabat with a fixed profile of relative humidity. This work has implications for tropical variability in past warm climates as well as anthropogenic global warming scenarios.

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  • Increases in the activity of the Madden-Julian Oscillation and convectively coupled equatorial Kelvin waves have been found in simulations with conventional and superparameterized climate models.

    “Furthermore, increases in the activity of the Madden-Julian Oscillation and convectively coupled equatorial Kelvin waves have been found in simulations with conventional and superparameterized climate models [5, 12].”

    From Precipitation Extremes Under Climate Change (2015) · cites this paper as [5]

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Related

Authors
Arnold, N. P., Kuang, Z., & Tziperman, E.
Affiliations
Harvard University (US)
ORCID
Venue
Journal of Climate
Publisher
American Meteorological Society
Published
2013-02-01
Volume
26
Issue
3
Pages
988-1001
ISSN
  • 0894-8755 (ISSN-L)
  • 1520-0442
DOI
10.1175/jcli-d-12-00272.1
OpenAlex
W2103387024
Cited by
107
References
76
Citations by year
2025: 8 · 2024: 11 · 2023: 10 · 2022: 8 · 2021: 8 · 2020: 9 · 2019: 7 · 2018: 13 · 2017: 9 · 2016: 7 · 2015: 9 · 2014: 4 · 2013: 3 · 2012: 1
FWCI
4.50
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of Climate (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Meteorological Phenomena and Simulations
  • Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric aerosols and clouds
Keywords
Madden-Julian Oscillation, sea surface temperature, intraseasonal variability, outgoing longwave radiation, moist static energy budget, vertical advection, aquaplanet simulations, tropical variability, global warming

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