The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March
The Tibetan Plateau (TP), referred to as the “Asian water tower,” contains one of the largest land ice masses on Earth. The local glacier shrinkage and frozen-water storage are strongly affected by variations in surface air temperature over the TP (TPSAT), especially in springtime. This study reveal...
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ftunivbergen:oai:bora.uib.no:11250/2837978 2023-05-15T17:28:15+02:00 The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. 2021 application/pdf https://hdl.handle.net/11250/2837978 https://doi.org/10.1175/JCLI-D-20-0157.1 eng eng AMS Trond Mohn stiftelse: BFS2018TMT01 Norges forskningsråd: 276730 urn:issn:0894-8755 https://hdl.handle.net/11250/2837978 https://doi.org/10.1175/JCLI-D-20-0157.1 cristin:1900922 Journal of Climate. 2021, 34, 4227-4242. Copyright 2021 American Meteorological Society Journal of Climate 4227-4242 34 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1175/JCLI-D-20-0157.1 2023-03-14T17:41:37Z The Tibetan Plateau (TP), referred to as the “Asian water tower,” contains one of the largest land ice masses on Earth. The local glacier shrinkage and frozen-water storage are strongly affected by variations in surface air temperature over the TP (TPSAT), especially in springtime. This study reveals that the relationship between the February North Atlantic Oscillation (NAO) and March TPSAT is unstable with time and regulated by the phase of the Atlantic multidecadal variability (AMV). The significant out-of-phase connection occurs only during the warm phase of AMV (AMV+). The results show that during the AMV+, the negative phase of the NAO persists from February to March, and is accompanied by a quasi-stationary Rossby wave train trapped along a northward-shifted subtropical westerly jet stream across Eurasia, inducing an anomalous adiabatic descent that warms the TP. However, during the cold phase of the AMV, the negative NAO cannot persist into March. The Rossby wave train propagates along the well-separated polar and subtropical westerly jets, and the NAO–TPSAT connection is broken. Further investigation suggests that the enhanced synoptic eddy and low-frequency flow (SELF) interaction over the North Atlantic in February and March during the AMV+, caused by the southward-shifted storm track, helps maintain the NAO pattern via positive eddy feedback. This study provides a new detailed perspective on the decadal variability of the North Atlantic–TP connection in late winter to early spring. publishedVersion Article in Journal/Newspaper North Atlantic North Atlantic oscillation University of Bergen: Bergen Open Research Archive (BORA-UiB) Journal of Climate 34 11 4227 4242 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
description |
The Tibetan Plateau (TP), referred to as the “Asian water tower,” contains one of the largest land ice masses on Earth. The local glacier shrinkage and frozen-water storage are strongly affected by variations in surface air temperature over the TP (TPSAT), especially in springtime. This study reveals that the relationship between the February North Atlantic Oscillation (NAO) and March TPSAT is unstable with time and regulated by the phase of the Atlantic multidecadal variability (AMV). The significant out-of-phase connection occurs only during the warm phase of AMV (AMV+). The results show that during the AMV+, the negative phase of the NAO persists from February to March, and is accompanied by a quasi-stationary Rossby wave train trapped along a northward-shifted subtropical westerly jet stream across Eurasia, inducing an anomalous adiabatic descent that warms the TP. However, during the cold phase of the AMV, the negative NAO cannot persist into March. The Rossby wave train propagates along the well-separated polar and subtropical westerly jets, and the NAO–TPSAT connection is broken. Further investigation suggests that the enhanced synoptic eddy and low-frequency flow (SELF) interaction over the North Atlantic in February and March during the AMV+, caused by the southward-shifted storm track, helps maintain the NAO pattern via positive eddy feedback. This study provides a new detailed perspective on the decadal variability of the North Atlantic–TP connection in late winter to early spring. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. |
spellingShingle |
Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March |
author_facet |
Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. |
author_sort |
Li, Jingyi |
title |
The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March |
title_short |
The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March |
title_full |
The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March |
title_fullStr |
The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March |
title_full_unstemmed |
The Atlantic Multidecadal Variability phase-dependence of teleconnection between the North Atlantic Oscillation in February and the Tibetan Plateau in March |
title_sort |
atlantic multidecadal variability phase-dependence of teleconnection between the north atlantic oscillation in february and the tibetan plateau in march |
publisher |
AMS |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2837978 https://doi.org/10.1175/JCLI-D-20-0157.1 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Journal of Climate 4227-4242 34 |
op_relation |
Trond Mohn stiftelse: BFS2018TMT01 Norges forskningsråd: 276730 urn:issn:0894-8755 https://hdl.handle.net/11250/2837978 https://doi.org/10.1175/JCLI-D-20-0157.1 cristin:1900922 Journal of Climate. 2021, 34, 4227-4242. |
op_rights |
Copyright 2021 American Meteorological Society |
op_doi |
https://doi.org/10.1175/JCLI-D-20-0157.1 |
container_title |
Journal of Climate |
container_volume |
34 |
container_issue |
11 |
container_start_page |
4227 |
op_container_end_page |
4242 |
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1766120809842081792 |