scholarly journals Northern Hemisphere Stratospheric Ozone Depletion Caused by Solar Proton Events: The Role of the Polar Vortex

2018 ◽  
Vol 45 (4) ◽  
pp. 2115-2124 ◽  
Author(s):  
M. H. Denton ◽  
R. Kivi ◽  
T. Ulich ◽  
M. A. Clilverd ◽  
C. J. Rodger ◽  
...  
Keyword(s):  
Northern Hemisphere ◽  
Ozone Depletion ◽  
Stratospheric Ozone ◽  
Polar Vortex ◽  
Solar Proton ◽  
Stratospheric Ozone Depletion ◽  
Solar Proton Events

scholarly journals Solar proton events and stratospheric ozone depletion over northern Finland

2018 ◽  
Vol 177 ◽  
pp. 218-227 ◽  
Author(s):  
M.H. Denton ◽  
R. Kivi ◽  
T. Ulich ◽  
C.J. Rodger ◽  
M.A. Clilverd ◽  
...  
Keyword(s):  
Ozone Depletion ◽  
Stratospheric Ozone ◽  
Solar Proton ◽  
Stratospheric Ozone Depletion ◽  
Solar Proton Events

Impacts of Stratospheric Ozone Extremes on Arctic High Cloud

2021 ◽  
Author(s):  
Karen Smith ◽  
Sarah Maleska ◽  
John Virgin
Keyword(s):  
Northern Hemisphere ◽  
Ozone Depletion ◽  
Climate Model ◽  
Stratospheric Ozone ◽  
Global Climate Models ◽  
Arctic Climate ◽  
The Arctic ◽  
Stratospheric Ozone Depletion ◽  
High Cloud ◽  
The Impact

<p>Stratospheric ozone depletion in the Antarctic is well known to cause changes in Southern Hemisphere tropospheric climate; however, because of its smaller magnitude in the Arctic, the effects of stratospheric ozone depletion on Northern Hemisphere tropospheric climate are not as obvious or well understood. Recent research using both global climate models and observational data has determined that the impact of ozone depletion on ozone extremes can affect interannual variability in tropospheric circulation in the Northern Hemisphere in spring. To further this work, we use a coupled chemistry–climate model to examine the difference in high cloud between years with anomalously low and high Arctic stratospheric ozone concentrations. We find that low ozone extremes during the late twentieth century, when ozone-depleting substances (ODS) emissions are higher, are related to a decrease in upper tropospheric stability and an increase in high cloud fraction, which may contribute to enhanced Arctic surface warming in spring through a positive longwave cloud radiative effect. A better understanding of how Arctic climate is affected by ODS emissions, ozone depletion, and ozone extremes will lead to improved predictions of Arctic climate and its associated feedbacks with atmospheric fields as ozone levels recover.</p>

scholarly journals Drivers of the Recent Tropical Expansion in the Southern Hemisphere: Changing SSTs or Ozone Depletion?

2015 ◽  
Vol 28 (16) ◽  
pp. 6581-6586 ◽  
Author(s):  
Darryn W. Waugh ◽  
Chaim I. Garfinkel ◽  
Lorenzo M. Polvani
Keyword(s):  
Ozone Depletion ◽  
Meta Analysis ◽  
Stratospheric Ozone ◽  
Austral Summer ◽  
Hadley Cell ◽  
Sea Surface ◽  
Relative Role ◽  
Stratospheric Ozone Depletion ◽  
Antarctic Ozone

Abstract Observational evidence indicates that the southern edge of the Hadley cell (HC) has shifted southward during austral summer in recent decades. However, there is no consensus on the cause of this shift, with several studies reaching opposite conclusions as to the relative role of changes in sea surface temperatures (SSTs) and stratospheric ozone depletion in causing this shift. Here, the authors perform a meta-analysis of the extant literature on this subject and quantitatively compare the results of all published studies that have used single-forcing model integrations to isolate the role of different factors on the HC expansion during austral summer. It is shown that the weight of the evidence clearly points to stratospheric ozone depletion as the dominant driver of the tropical summertime expansion over the period in which an ozone hole was formed (1979 to late 1990s), although SST trends have contributed to trends since then. Studies that have claimed SSTs as the major driver of tropical expansion since 1979 have used prescribed ozone fields that underrepresent the observed Antarctic ozone depletion.

Impacts of Stratospheric Ozone Extremes on Arctic High Cloud

2020 ◽  
Vol 33 (20) ◽  
pp. 8869-8884
Author(s):  
Sarah Maleska ◽  
Karen L. Smith ◽  
John Virgin
Keyword(s):  
Northern Hemisphere ◽  
Ozone Depletion ◽  
Climate Model ◽  
Stratospheric Ozone ◽  
Global Climate Models ◽  
Arctic Climate ◽  
The Arctic ◽  
Stratospheric Ozone Depletion ◽  
High Cloud ◽  
The Impact

AbstractStratospheric ozone depletion in the Antarctic is well known to cause changes in Southern Hemisphere tropospheric climate; however, because of its smaller magnitude in the Arctic, the effects of stratospheric ozone depletion on Northern Hemisphere tropospheric climate are not as obvious or well understood. Recent research using both global climate models and observational data has determined that the impact of ozone depletion on ozone extremes can affect interannual variability in tropospheric circulation in the Northern Hemisphere in spring. To further this work, we use a coupled chemistry–climate model to examine the difference in high cloud between years with anomalously low and high Arctic stratospheric ozone concentrations. We find that low ozone extremes during the late twentieth century, when ozone-depleting substances (ODS) emissions are higher, are related to a decrease in upper tropospheric stability and an increase in high cloud fraction, which may contribute to enhanced Arctic surface warming in spring through a positive longwave cloud radiative effect. A better understanding of how Arctic climate is affected by ODS emissions, ozone depletion, and ozone extremes will lead to improved predictions of Arctic climate and its associated feedbacks with atmospheric fields as ozone levels recover.

Impacts of stratospheric ozone extremes on Arctic high cloud

2020 ◽  
Author(s):  
Karen Smith ◽  
Sarah Maleska ◽  
John Virgin
Keyword(s):  
Northern Hemisphere ◽  
Ozone Depletion ◽  
Climate Model ◽  
Stratospheric Ozone ◽  
Global Climate Models ◽  
Arctic Climate ◽  
The Arctic ◽  
Stratospheric Ozone Depletion ◽  
High Cloud ◽  
The Impact

<p>Stratospheric ozone depletion in the Antarctic is well known to cause changes in Southern Hemisphere tropospheric climate; however, due to its smaller magnitude in the Arctic, the effects of stratospheric ozone depletion on Northern Hemisphere tropospheric climate are not as obvious or well understood. Recent research using both global climate models and observational data has determined that the impact of ozone depletion on ozone extremes can affect interannual variability in tropospheric circulation in the Northern Hemisphere in spring. To further this work, we use a coupled chemistry-climate model to examine the difference in high cloud between years with anomalously low and high Arctic stratospheric ozone concentrations. We find that low ozone extremes during the late twentieth century, when ODS emissions are higher, are related to a decrease in upper tropospheric stability and an increase in high cloud fraction, which may have contributed to Arctic surface warming via a positive longwave cloud radiative effect in the past few decades compared to other regions. A better understanding of how Arctic climate is affected by ODS emissions, ozone depletion and ozone extremes will lead to improved predictions of Arctic climate and its associated feedbacks with atmospheric fields as ozone levels recover.</p>

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