Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part II: A Theoretical Explanation
Abstract
In Part I of this study, it was shown that the Eurasian cold anomalies related to Arctic warming depend strongly on the quasi stationarity and persistence of the Ural blocking (UB). The analysis here revealed that under weak mean westerly wind (MWW) and vertical shear (VS) (quasi barotropic) conditions with weak synoptic-scale eddies and a large planetary wave anomaly, the growth of UB is slow and its amplitude is small. For this case, a quasi-stationary and persistent UB is seen. However, under strong MWW and VS (quasi baroclinic) conditions, synoptic-scale eddies are stronger and the growth of UB is rapid; the resulting UB is less persistent and has large amplitude. In this case, a marked retrogression of the UB is observed. The dynamical mechanism behind the dependence of the movement and persistence of UB upon the background conditions is further examined using a nonlinear multiscale model. The results show that when the blocking has large amplitude under quasi-baroclinic conditions, the blocking-induced westward displacement greatly exceeds the strong mean zonal-wind-induced eastward movement and hence generates a marked retrogression of the blocking. By contrast, under quasi-barotropic conditions because the UB amplitude is relatively small the blocking-induced westward movement is less distinct, givingmore »
- Authors:
-
- Chinese Academy of Sciences (CAS), Beijing (China)
- State Univ. of New York (SUNY), Albany, NY (United States); National Center for Atmospheric Research, Boulder, CO (United States)
- Univ. of Melbourne (Australia)
- Publication Date:
- Research Org.:
- State Univ. of New York (SUNY), Albany, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1537011
- Grant/Contract Number:
- SC0012602
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Climate
- Additional Journal Information:
- Journal Volume: 30; Journal Issue: 10; Journal ID: ISSN 0894-8755
- Publisher:
- American Meteorological Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; Meteorology & Atmospheric Sciences
Citation Formats
Luo, Dehai, Yao, Yao, Dai, Aiguo, Simmonds, Ian, and Zhong, Linhao. Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part II: A Theoretical Explanation. United States: N. p., 2017.
Web. doi:10.1175/jcli-d-16-0262.1.
Luo, Dehai, Yao, Yao, Dai, Aiguo, Simmonds, Ian, & Zhong, Linhao. Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part II: A Theoretical Explanation. United States. doi:10.1175/jcli-d-16-0262.1.
Luo, Dehai, Yao, Yao, Dai, Aiguo, Simmonds, Ian, and Zhong, Linhao. Mon .
"Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part II: A Theoretical Explanation". United States. doi:10.1175/jcli-d-16-0262.1. https://www.osti.gov/servlets/purl/1537011.
@article{osti_1537011,
title = {Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part II: A Theoretical Explanation},
author = {Luo, Dehai and Yao, Yao and Dai, Aiguo and Simmonds, Ian and Zhong, Linhao},
abstractNote = {In Part I of this study, it was shown that the Eurasian cold anomalies related to Arctic warming depend strongly on the quasi stationarity and persistence of the Ural blocking (UB). The analysis here revealed that under weak mean westerly wind (MWW) and vertical shear (VS) (quasi barotropic) conditions with weak synoptic-scale eddies and a large planetary wave anomaly, the growth of UB is slow and its amplitude is small. For this case, a quasi-stationary and persistent UB is seen. However, under strong MWW and VS (quasi baroclinic) conditions, synoptic-scale eddies are stronger and the growth of UB is rapid; the resulting UB is less persistent and has large amplitude. In this case, a marked retrogression of the UB is observed. The dynamical mechanism behind the dependence of the movement and persistence of UB upon the background conditions is further examined using a nonlinear multiscale model. The results show that when the blocking has large amplitude under quasi-baroclinic conditions, the blocking-induced westward displacement greatly exceeds the strong mean zonal-wind-induced eastward movement and hence generates a marked retrogression of the blocking. By contrast, under quasi-barotropic conditions because the UB amplitude is relatively small the blocking-induced westward movement is less distinct, giving rise to a quasi-stationary and persistent blocking. It is further shown that the strong mid–high-latitude North Atlantic mean zonal wind is the quasi-barotropic condition that suppresses UB’s retrogression and thus is conducive to the quasi stationarity and persistence of the UB. The model results show that the blocking duration is longer when the mean zonal wind in the blocking region or eddy strength is weaker.},
doi = {10.1175/jcli-d-16-0262.1},
journal = {Journal of Climate},
number = 10,
volume = 30,
place = {United States},
year = {2017},
month = {4}
}
Web of Science
Works referencing / citing this record:
Dryland climate change: Recent progress and challenges: Dryland Climate Change
journal, September 2017
- Huang, J.; Li, Y.; Fu, C.
- Reviews of Geophysics, Vol. 55, Issue 3
The impact of Arctic sea ice on the inter-annual variations of summer Ural blocking
journal, August 2018
- Zhang, Ruonan; Sun, Chenghu; Zhang, Renhe
- International Journal of Climatology, Vol. 38, Issue 12
Climatological features of blocking highs from the perspective of air mass and mass transport
journal, August 2019
- Li, Yafei; Ren, Rongcai; Cai, Ming
- International Journal of Climatology, Vol. 40, Issue 2
Changes in winter stationary wave activity during weak mid‐latitude and Arctic thermal contrast period
journal, September 2019
- Wang, Sai; Nath, Debashis; Chen, Wen
- International Journal of Climatology, Vol. 40, Issue 3
Anomalous winter moisture transport associated with the recent surface warming over the Barents–Kara seas region since the mid‐2000s
journal, October 2019
- Wang, Sai; Chen, Wen; Chen, Shangfeng
- International Journal of Climatology, Vol. 40, Issue 4
Trends in northern midlatitude atmospheric wave power from 1950 to 2099
journal, February 2020
- Sussman, Heather S.; Raghavendra, Ajay; Roundy, Paul E.
- Climate Dynamics, Vol. 54, Issue 5-6
Ural Blocking Driving Extreme Arctic Sea Ice Loss, Cold Eurasia, and Stratospheric Vortex Weakening in Autumn and Early Winter 2016–2017
journal, November 2019
- Tyrlis, Evangelos; Manzini, Elisa; Bader, Jürgen
- Journal of Geophysical Research: Atmospheres, Vol. 124, Issue 21
Recent Trends of Extreme Precipitation and Their Teleconnection with Atmospheric Circulation in the Beijing-Tianjin Sand Source Region, China, 1960–2014
journal, April 2017
- Wei, Wei; Shi, Zhongjie; Yang, Xiaohui
- Atmosphere, Vol. 8, Issue 12
Effects of Northern Hemisphere Atmospheric Blocking on Arctic Sea Ice Decline in Winter at Weekly Time Scales
journal, August 2018
- Yao, Yao; Luo, Dehai; Zhong, Linhao
- Atmosphere, Vol. 9, Issue 9