Temporal Variation of Relationships between Circulation Modes and Surface Temperature in the Twentieth Century in Winter
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F24%3A43898766" target="_blank" >RIV/44555601:13520/24:43898766 - isvavai.cz</a>
Result on the web
<a href="https://journals.ametsoc.org/view/journals/clim/aop/JCLI-D-24-0120.1/JCLI-D-24-0120.1.pdf" target="_blank" >https://journals.ametsoc.org/view/journals/clim/aop/JCLI-D-24-0120.1/JCLI-D-24-0120.1.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1175/JCLI-D-24-0120.1" target="_blank" >10.1175/JCLI-D-24-0120.1</a>
Alternative languages
Result language
angličtina
Original language name
Temporal Variation of Relationships between Circulation Modes and Surface Temperature in the Twentieth Century in Winter
Original language description
Modes of low-frequency variability of atmospheric circulation undergo decadal variations, which affect their spatiotemporal impact on climatic variables on long time scales. Previous studies focused either to one circulation mode or to limited geographical areas. Here, the topic is substantially extended as we provide an overview of long-term variations of all detected circulation modes in the northern extratropics in winter and their impact on relationships with temperature during the twentieth century. Circulation modes are identified by rotated principal component analysis of 500-hPa geopotential heights in the ERA-20C reanalysis; gridded surface temperature data are gained from the Climatic Research Unit Time Series (CRUTS) dataset. Temporal variations of relationships are evaluated by 15-yr running correlations between the circulation modes and surface temperature at all land grid points. Time series of running correlations with all nine circulation modes at all grid points are clustered using the partitioning around medoids (PAM) method into 18 clusters. Both composite maps and temperature advection at the 850-hPa level during specific periods of strengthened, weakened, and normal relationships with surface temperature are used for the determination of mechanisms responsible for the variation of relationships. The main mechanisms are changes in the location, shape, and intensity of centers, and formation or split of centers. These mechanisms affect mainly the intensity and direction of advection, which translate into the magnitude of relationships. Possible causes of changes in the spatial structure of circulation modes are linked with El Ni?o?Southern Oscillation (ENSO), shifts of the Pacific decadal oscillation (PDO), and long-term changes in the sea ice extent.
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
10510 - Climatic research
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
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 Climate
ISSN
0894-8755
e-ISSN
1520-0442
Volume of the periodical
2025
Issue of the periodical within the volume
38
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
309-326
UT code for WoS article
001421404700001
EID of the result in the Scopus database
2-s2.0-85217652551