A Stratospheric Approach to Diagnose the North American Winter Dipole
It has been well established in the literature that the stratosphere is dynamically coupled with the troposphere during boreal winter. The North American Winter Dipole is comprised of an upper-tropospheric contrast between a ridge over western North America, and a trough over eastern North America....
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ftutahsudc:oai:digitalcommons.usu.edu:etd-9016 2024-02-04T10:04:05+01:00 A Stratospheric Approach to Diagnose the North American Winter Dipole Panosyan, Henrik 2020-08-01T07:00:00Z application/pdf https://digitalcommons.usu.edu/etd/7875 https://doi.org/10.26076/f9dc-41a6 https://digitalcommons.usu.edu/context/etd/article/9016/viewcontent/PSCetd2020Aug_Panosyan_Henrik.pdf unknown DigitalCommons@USU https://digitalcommons.usu.edu/etd/7875 doi:10.26076/f9dc-41a6 https://digitalcommons.usu.edu/context/etd/article/9016/viewcontent/PSCetd2020Aug_Panosyan_Henrik.pdf Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact digitalcommons@usu.edu. All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 North American Winter Dipole Polar Night Jet Stratospheric Polar Vortex stratosphere-troposphere coupling climate dynamics and variability Climate Physical Sciences and Mathematics text 2020 ftutahsudc https://doi.org/10.26076/f9dc-41a6 2024-01-11T18:41:22Z It has been well established in the literature that the stratosphere is dynamically coupled with the troposphere during boreal winter. The North American Winter Dipole is comprised of an upper-tropospheric contrast between a ridge over western North America, and a trough over eastern North America. The variance of this circulation regime has increased in recent years, with its amplified states being associated with extremes ranging from drought and floods, to extreme cold air outbreaks. This study explores the stratospheric link to this extreme weather regime, in the hopes of ultimately improving the predictability of this regime on intraseasonal-to-seasonal timescales. We find evidence for barotropic coupling between the stratospheric and tropospheric circulation in the vicinity of the North American Winter Dipole when the phase of the stratospheric perturbation associated with the Polar Night Jet (or Stratospheric Polar Vortex), constructively interferes with its tropospheric counterpart associated with the North American Winter Dipole, and a lack there-of when the phases destructively interfere. Text polar night Utah State University: DigitalCommons@USU |
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Utah State University: DigitalCommons@USU |
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unknown |
topic |
North American Winter Dipole Polar Night Jet Stratospheric Polar Vortex stratosphere-troposphere coupling climate dynamics and variability Climate Physical Sciences and Mathematics |
spellingShingle |
North American Winter Dipole Polar Night Jet Stratospheric Polar Vortex stratosphere-troposphere coupling climate dynamics and variability Climate Physical Sciences and Mathematics Panosyan, Henrik A Stratospheric Approach to Diagnose the North American Winter Dipole |
topic_facet |
North American Winter Dipole Polar Night Jet Stratospheric Polar Vortex stratosphere-troposphere coupling climate dynamics and variability Climate Physical Sciences and Mathematics |
description |
It has been well established in the literature that the stratosphere is dynamically coupled with the troposphere during boreal winter. The North American Winter Dipole is comprised of an upper-tropospheric contrast between a ridge over western North America, and a trough over eastern North America. The variance of this circulation regime has increased in recent years, with its amplified states being associated with extremes ranging from drought and floods, to extreme cold air outbreaks. This study explores the stratospheric link to this extreme weather regime, in the hopes of ultimately improving the predictability of this regime on intraseasonal-to-seasonal timescales. We find evidence for barotropic coupling between the stratospheric and tropospheric circulation in the vicinity of the North American Winter Dipole when the phase of the stratospheric perturbation associated with the Polar Night Jet (or Stratospheric Polar Vortex), constructively interferes with its tropospheric counterpart associated with the North American Winter Dipole, and a lack there-of when the phases destructively interfere. |
format |
Text |
author |
Panosyan, Henrik |
author_facet |
Panosyan, Henrik |
author_sort |
Panosyan, Henrik |
title |
A Stratospheric Approach to Diagnose the North American Winter Dipole |
title_short |
A Stratospheric Approach to Diagnose the North American Winter Dipole |
title_full |
A Stratospheric Approach to Diagnose the North American Winter Dipole |
title_fullStr |
A Stratospheric Approach to Diagnose the North American Winter Dipole |
title_full_unstemmed |
A Stratospheric Approach to Diagnose the North American Winter Dipole |
title_sort |
stratospheric approach to diagnose the north american winter dipole |
publisher |
DigitalCommons@USU |
publishDate |
2020 |
url |
https://digitalcommons.usu.edu/etd/7875 https://doi.org/10.26076/f9dc-41a6 https://digitalcommons.usu.edu/context/etd/article/9016/viewcontent/PSCetd2020Aug_Panosyan_Henrik.pdf |
genre |
polar night |
genre_facet |
polar night |
op_source |
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 |
op_relation |
https://digitalcommons.usu.edu/etd/7875 doi:10.26076/f9dc-41a6 https://digitalcommons.usu.edu/context/etd/article/9016/viewcontent/PSCetd2020Aug_Panosyan_Henrik.pdf |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact digitalcommons@usu.edu. |
op_doi |
https://doi.org/10.26076/f9dc-41a6 |
_version_ |
1789972044450889728 |