Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia
Abstract A remarkable feature of interannual climate variability is a robust link of wintertime anomalies of surface air temperature (SAT) in northern Asia to pan-Atlantic SAT variations associated with the North Atlantic Oscillation (NAO). Here statistical analyses of data from the era of satellite...
Published in: | Scientific Reports |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media LLC
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1038/s41598-019-51019-w http://www.nature.com/articles/s41598-019-51019-w.pdf http://www.nature.com/articles/s41598-019-51019-w |
id |
crspringernat:10.1038/s41598-019-51019-w |
---|---|
record_format |
openpolar |
spelling |
crspringernat:10.1038/s41598-019-51019-w 2023-05-15T17:30:40+02:00 Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia Schlichtholz, Pawel 2019 http://dx.doi.org/10.1038/s41598-019-51019-w http://www.nature.com/articles/s41598-019-51019-w.pdf http://www.nature.com/articles/s41598-019-51019-w en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 9, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2019 crspringernat https://doi.org/10.1038/s41598-019-51019-w 2022-01-04T09:58:25Z Abstract A remarkable feature of interannual climate variability is a robust link of wintertime anomalies of surface air temperature (SAT) in northern Asia to pan-Atlantic SAT variations associated with the North Atlantic Oscillation (NAO). Here statistical analyses of data from the era of satellite observations (1979–2017) are used to show that about 80% of the variance of the winter (December-March) mean area-averaged SAT anomalies in northern Asia can be explained by the anomalous surface circulation associated with an NAO-like mode of sea level pressure variability over extratropical Eurasia. These SAT anomalies are related equally strongly to the “Lake Baikal” vortex representing variations of the upper-tropospheric circulation over northern Asia. Support is given for the scenario that this vortex drives SAT anomalies in northern Asia via surface-reaching displacements of isentropic surfaces and that it is coupled to climate variability in the Euro-Atlantic sector via interactions between the North Atlantic storm track, quasi-stationary planetary waves, and zonal-mean zonal winds. The results underpin the importance of a lesser-known zonal wavenumber-3 structure of disturbances trapped over Eurasia by the polar front jet rather than the better-known zonal wavenumber-5 structure of disturbances trapped by the subtropical jet for NAO teleconnections. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Springer Nature (via Crossref) Scientific Reports 9 1 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Schlichtholz, Pawel Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia |
topic_facet |
Multidisciplinary |
description |
Abstract A remarkable feature of interannual climate variability is a robust link of wintertime anomalies of surface air temperature (SAT) in northern Asia to pan-Atlantic SAT variations associated with the North Atlantic Oscillation (NAO). Here statistical analyses of data from the era of satellite observations (1979–2017) are used to show that about 80% of the variance of the winter (December-March) mean area-averaged SAT anomalies in northern Asia can be explained by the anomalous surface circulation associated with an NAO-like mode of sea level pressure variability over extratropical Eurasia. These SAT anomalies are related equally strongly to the “Lake Baikal” vortex representing variations of the upper-tropospheric circulation over northern Asia. Support is given for the scenario that this vortex drives SAT anomalies in northern Asia via surface-reaching displacements of isentropic surfaces and that it is coupled to climate variability in the Euro-Atlantic sector via interactions between the North Atlantic storm track, quasi-stationary planetary waves, and zonal-mean zonal winds. The results underpin the importance of a lesser-known zonal wavenumber-3 structure of disturbances trapped over Eurasia by the polar front jet rather than the better-known zonal wavenumber-5 structure of disturbances trapped by the subtropical jet for NAO teleconnections. |
format |
Article in Journal/Newspaper |
author |
Schlichtholz, Pawel |
author_facet |
Schlichtholz, Pawel |
author_sort |
Schlichtholz, Pawel |
title |
Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia |
title_short |
Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia |
title_full |
Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia |
title_fullStr |
Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia |
title_full_unstemmed |
Upper-tropospheric bridging of wintertime surface climate variability in the Euro-Atlantic region and northern Asia |
title_sort |
upper-tropospheric bridging of wintertime surface climate variability in the euro-atlantic region and northern asia |
publisher |
Springer Science and Business Media LLC |
publishDate |
2019 |
url |
http://dx.doi.org/10.1038/s41598-019-51019-w http://www.nature.com/articles/s41598-019-51019-w.pdf http://www.nature.com/articles/s41598-019-51019-w |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Scientific Reports volume 9, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-019-51019-w |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766127548030255104 |