On the aliasing of the solar cycle in the lower stratospheric tropical temperature
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10370253" target="_blank" >RIV/00216208:11320/17:10370253 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/2017JD026948" target="_blank" >http://dx.doi.org/10.1002/2017JD026948</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/2017JD026948" target="_blank" >10.1002/2017JD026948</a>
Alternative languages
Result language
angličtina
Original language name
On the aliasing of the solar cycle in the lower stratospheric tropical temperature
Original language description
The double-peaked response of the tropical stratospheric temperature profile to the 11 year solar cycle (SC) has been well documented. However, there are concerns about the origin of the lower peak due to potential aliasing with volcanic eruptions or the El Nio-Southern Oscillation (ENSO) detected using multiple linear regression analysis. We confirm the aliasing using the results of the chemistry-climate model (CCM) SOCOLv3 obtained in the framework of the International Global Atmospheric Chemisty/Stratosphere-troposphere Processes And their Role in Climate Chemistry-Climate Model Initiative phase 1. We further show that even without major volcanic eruptions included in transient simulations, the lower stratospheric response exhibits a residual peak when historical sea surface temperatures (SSTs)/sea ice coverage (SIC) are used. Only the use of climatological SSTs/SICs in addition to background stratospheric aerosols removes volcanic and ENSO signals and results in an almost complete disappearance of the modeled solar signal in the lower stratospheric temperature. We demonstrate that the choice of temporal subperiod considered for the regression analysis has a large impact on the estimated profile signal in the lower stratosphere: at least 45 consecutive years are needed to avoid the large aliasing effect of SC maxima with volcanic eruptions in 1982 and 1991 in historical simulations, reanalyses, and observations. The application of volcanic forcing compiled for phase 6 of the Coupled Model Intercomparison Project (CMIP6) in the CCM SOCOLv3 reduces the warming overestimation in the tropical lower stratosphere and the volcanic aliasing of the temperature response to the SC, although it does not eliminate it completely.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
<a href="/en/project/GC16-01562J" target="_blank" >GC16-01562J: Middle atmosphere effects of localized gravity wave forcing</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN
2169-897X
e-ISSN
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Volume of the periodical
122
Issue of the periodical within the volume
17
Country of publishing house
US - UNITED STATES
Number of pages
18
Pages from-to
9076-9093
UT code for WoS article
000416387300008
EID of the result in the Scopus database
2-s2.0-85030096759