Impact of Interannual Ozone Variations on the Downward Coupling of the 2002 Southern Hemisphere Stratospheric Warming

2020 ◽  
Vol 125 (16) ◽  
Author(s):  
H. H. Hendon ◽  
E.‐P. Lim ◽  
S. Abhik
Keyword(s):  
Southern Hemisphere ◽  
Stratospheric Warming ◽  
Ozone Variations

Stratospheric ozone variations in the northern and the southern hemisphere during the period 1957?1990

1993 ◽  
Vol 60 (2) ◽  
pp. 109-125 ◽  
Author(s):  
John Xanthakis ◽  
Constantine Poulakos ◽  
Christos S. Zerefos
Keyword(s):  
Southern Hemisphere ◽  
Stratospheric Ozone ◽  
Ozone Variations

scholarly journals Southern-Hemisphere high-latitude stratospheric warming revisit

2019 ◽  
Vol 54 (3-4) ◽  
pp. 1671-1682
Author(s):  
Yan Xia ◽  
Weixuan Xu ◽  
Yongyun Hu ◽  
Fei Xie
Keyword(s):  
Southern Hemisphere ◽  
High Latitude ◽  
Recent Decade ◽  
Warming Trend ◽  
High Latitudes ◽  
Stratospheric Warming ◽  
Amundsen Sea ◽  
Maximum Warming ◽  
Dipole Pattern ◽  
The Western Pacific

AbstractPrevious studies showed significant stratospheric warming at the Southern-Hemisphere (SH) high latitudes in September and October over 1979–2006. The warming trend center was located over the Southern Ocean poleward of the Western Pacific in September, with a maximum trend of about 2.8 K/decade. The warming trends in October showed a dipole pattern, with the warming center over the Ross and Amundsen Sea, and the maximum warming trend is about 2.6 K/decade. In the present study, we revisit the problem of the SH stratospheric warming in the recent decade. It is found that the SH high-latitude stratosphere continued warming in September and October over 2007–2017, but with very different spatial patterns. Multiple linear regression demonstrates that ozone increases play an important role in the SH high-latitude stratospheric warming in September and November, while the changes in the Brewer-Dobson circulation contributes little to the warming. This is different from the situation over 1979–2006 when the SH high-latitude stratospheric warming was mainly caused by the strengthening of the Brewer-Dobson circulation and the eastward shift of the warming center. Simulations forced with observed ozone changes over 2007–2017 shows warming trends, suggesting that the observed warming trends over 2007–2017 are at least partly due to ozone recovery. The warming trends due to ozone recovery have important implications for stratospheric, tropospheric and surface climates on SH.

scholarly journals Temperature tele‐connections between the tropical and polar middle atmosphere in the Southern Hemisphere during the 2010 minor sudden stratospheric warming

2020 ◽  
Vol 22 (1) ◽  
Author(s):  
Sunkara Eswaraiah ◽  
Changsup Lee ◽  
Wonseok Lee ◽  
Yong Ha Kim ◽  
Kondapalli Niranjan Kumar ◽  
...  
Keyword(s):  
Southern Hemisphere ◽  
Middle Atmosphere ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming

scholarly journals The Southern Hemisphere sudden stratospheric warming of September 2019

2020 ◽  
Vol 65 (21) ◽  
pp. 1800-1802 ◽  
Author(s):  
Xiaocen Shen ◽  
Lin Wang ◽  
Scott Osprey
Keyword(s):  
Southern Hemisphere ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming

scholarly journals Dynamical evolution of a minor sudden stratospheric warming in the Southern Hemisphere in 2019

2021 ◽  
Author(s):  
Guangyu Liu ◽  
Toshihiko Hirooka ◽  
Nawo Eguchi ◽  
Kirstin Krüger
Keyword(s):  
Southern Hemisphere ◽  
Vertical Component ◽  
Polar Vortex ◽  
Planetary Waves ◽  
High Latitudes ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Zonal Wavenumber ◽  
Westerly Winds ◽  
A Minor

Abstract. This study analyzes the Japanese 55-year Reanalysis (JRA-55) dataset from 2002 to 2019 to examine the sudden stratospheric warming event that occurred in the Southern Hemisphere (SH) in 2019 (hereafter referred to as SSW2019). Strong warming at the polar cap and decelerated westerly winds were observed, but since there was no reversal of westerly winds to easterly winds at 60° S in the middle to lower stratosphere, the SSW2019 is classified as a minor warming event. The results show that quasi-stationary planetary waves of zonal wavenumber 1 developed during the SSW2019. The strong vertical component of the Eliassen–Palm flux with zonal wavenumber 1 is indicative of pronounced propagation of planetary waves to the stratosphere. The wave driving in September 2019 shows that the values are larger than those of the major SSW event in 2002 (hereafter referred to as SSW2002). Since there was no pronounced preconditioning (as in SSW2002) and the polar vortex was already strong before the SSW2019 occurred, a major disturbance of the polar vortex was unlikely to have taken place. The strong wave driving in SSW2019 occurred in high latitudes. Waveguides (i.e., positive values of the refractive index) are found at high latitudes in the upper stratosphere during the warming period, which provided favorable conditions for quasi-stationary planetary waves to propagate upward and poleward.

scholarly journals Quasi 10-day wave modulation of equatorial ionization anomaly during the Southern Hemisphere stratospheric warming of 2002

2019 ◽  
Author(s):  
Xiaohua Mo
Keyword(s):  
Southern Hemisphere ◽  
Phase Relationship ◽  
Periodic Oscillation ◽  
Electron Content ◽  
Stratospheric Warming ◽  
International Gnss Service ◽  
Total Electron ◽  
Stratospheric Temperature ◽  
Equatorial Ionization Anomaly ◽  
Gps Station

Abstract. The present paper studies the perturbations in equatorial ionization anomaly (EIA) region during the Southern Hemisphere (SH) sudden stratospheric warming (SSW) of 2002, using the location of EIA crests derived from Global Positioning System (GPS) station observations and the Total Electron Content (TEC) obtained by International GNSS Service (IGS) global ionospheric TEC map (GIMs) in Asian sector. A strong quasi 10-day periodic oscillation is clearly identified in EIA region, and it has in-phase relationship between northern and southern EIA crests. An eastward phase progression of quasi 10-day wave is also seen in polar stratospheric temperature during this period, suggesting the enhanced quasi-10-day planetary wave associated with SSW produced oscillation in EIA region through modulating the equatorial fountain effect. Our results reveal some newer features of ionospheric variation that have not been reported during Northern Hemisphere (SH) SSWs.

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