On the Upward Extension of the Polar Vortices Into the Mesosphere

V. Lynn Harvey, Cora E. Randall, Larisa Petrovna Goncharenko, Erich Becker, Jeff France

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

The polar vortices play a central role in vertically coupling the atmosphere from the ground to geospace by shaping the background wind field through which atmospheric waves propagate. This work extends the vertical range of previous polar vortex climatologies into the upper mesosphere. The mesospheric polar vortices are defined using the CO gradient method with Microwave Limb Sounder satellite data; the stratospheric polar vortices are defined using a stream function-based algorithm with data from meteorological reanalyses. Strengths and weaknesses of the two vortex definitions are given, as well as recommendations for when, where, and why to use each definition. Midwinter mean vortex geometry in the mesosphere is funnel shaped in the Arctic, with a wide top and narrow bottom. The Antarctic mesospheric vortex tapers with height in early winter and broadens with height in late winter. The seasonal evolution of mesospheric vortex frequency of occurrence, size, and zonal symmetry in both hemispheres is presented. Unexpected behavior above 60 km includes late season vortex broadening in both hemispheres, especially following winters without sudden stratospheric warmings. Following extreme stratospheric disturbances the polar night jet in the mesosphere strengthens and shifts poleward, resulting in a mesospheric vortex that contracts. Overall, the mesospheric polar vortices are more similar between the two hemispheres than their stratospheric counterparts. The vortex climatology presented here serves as an observational benchmark to which the mesospheric polar vortices in high-top climate models can be evaluated.

元の言語英語
ページ(範囲)9171-9191
ページ数21
ジャーナルJournal of Geophysical Research: Atmospheres
123
発行部数17
DOI
出版物ステータス出版済み - 9 16 2018

Fingerprint

polar vortex
mesosphere
vortex
Vortex flow
vortices
winter
Upper atmosphere
climate models
remote sensing
Arctic region
hemispheres
microwave limb sounder
atmospheric wave
wind field
climatology
symmetry
satellite data
climate modeling
stratospheric warming
Climate models

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

これを引用

Harvey, V. L., Randall, C. E., Goncharenko, L. P., Becker, E., & France, J. (2018). On the Upward Extension of the Polar Vortices Into the Mesosphere. Journal of Geophysical Research: Atmospheres, 123(17), 9171-9191. https://doi.org/10.1029/2018JD028815

On the Upward Extension of the Polar Vortices Into the Mesosphere. / Harvey, V. Lynn; Randall, Cora E.; Goncharenko, Larisa Petrovna; Becker, Erich; France, Jeff.

:: Journal of Geophysical Research: Atmospheres, 巻 123, 番号 17, 16.09.2018, p. 9171-9191.

研究成果: ジャーナルへの寄稿記事

Harvey, VL, Randall, CE, Goncharenko, LP, Becker, E & France, J 2018, 'On the Upward Extension of the Polar Vortices Into the Mesosphere', Journal of Geophysical Research: Atmospheres, 巻. 123, 番号 17, pp. 9171-9191. https://doi.org/10.1029/2018JD028815
Harvey, V. Lynn ; Randall, Cora E. ; Goncharenko, Larisa Petrovna ; Becker, Erich ; France, Jeff. / On the Upward Extension of the Polar Vortices Into the Mesosphere. :: Journal of Geophysical Research: Atmospheres. 2018 ; 巻 123, 番号 17. pp. 9171-9191.
@article{a1fac621f3fe4bf58b2351c4f44cec0b,
title = "On the Upward Extension of the Polar Vortices Into the Mesosphere",
abstract = "The polar vortices play a central role in vertically coupling the atmosphere from the ground to geospace by shaping the background wind field through which atmospheric waves propagate. This work extends the vertical range of previous polar vortex climatologies into the upper mesosphere. The mesospheric polar vortices are defined using the CO gradient method with Microwave Limb Sounder satellite data; the stratospheric polar vortices are defined using a stream function-based algorithm with data from meteorological reanalyses. Strengths and weaknesses of the two vortex definitions are given, as well as recommendations for when, where, and why to use each definition. Midwinter mean vortex geometry in the mesosphere is funnel shaped in the Arctic, with a wide top and narrow bottom. The Antarctic mesospheric vortex tapers with height in early winter and broadens with height in late winter. The seasonal evolution of mesospheric vortex frequency of occurrence, size, and zonal symmetry in both hemispheres is presented. Unexpected behavior above 60 km includes late season vortex broadening in both hemispheres, especially following winters without sudden stratospheric warmings. Following extreme stratospheric disturbances the polar night jet in the mesosphere strengthens and shifts poleward, resulting in a mesospheric vortex that contracts. Overall, the mesospheric polar vortices are more similar between the two hemispheres than their stratospheric counterparts. The vortex climatology presented here serves as an observational benchmark to which the mesospheric polar vortices in high-top climate models can be evaluated.",
author = "Harvey, {V. Lynn} and Randall, {Cora E.} and Goncharenko, {Larisa Petrovna} and Erich Becker and Jeff France",
year = "2018",
month = "9",
day = "16",
doi = "10.1029/2018JD028815",
language = "English",
volume = "123",
pages = "9171--9191",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "17",

}

TY - JOUR

T1 - On the Upward Extension of the Polar Vortices Into the Mesosphere

AU - Harvey, V. Lynn

AU - Randall, Cora E.

AU - Goncharenko, Larisa Petrovna

AU - Becker, Erich

AU - France, Jeff

PY - 2018/9/16

Y1 - 2018/9/16

N2 - The polar vortices play a central role in vertically coupling the atmosphere from the ground to geospace by shaping the background wind field through which atmospheric waves propagate. This work extends the vertical range of previous polar vortex climatologies into the upper mesosphere. The mesospheric polar vortices are defined using the CO gradient method with Microwave Limb Sounder satellite data; the stratospheric polar vortices are defined using a stream function-based algorithm with data from meteorological reanalyses. Strengths and weaknesses of the two vortex definitions are given, as well as recommendations for when, where, and why to use each definition. Midwinter mean vortex geometry in the mesosphere is funnel shaped in the Arctic, with a wide top and narrow bottom. The Antarctic mesospheric vortex tapers with height in early winter and broadens with height in late winter. The seasonal evolution of mesospheric vortex frequency of occurrence, size, and zonal symmetry in both hemispheres is presented. Unexpected behavior above 60 km includes late season vortex broadening in both hemispheres, especially following winters without sudden stratospheric warmings. Following extreme stratospheric disturbances the polar night jet in the mesosphere strengthens and shifts poleward, resulting in a mesospheric vortex that contracts. Overall, the mesospheric polar vortices are more similar between the two hemispheres than their stratospheric counterparts. The vortex climatology presented here serves as an observational benchmark to which the mesospheric polar vortices in high-top climate models can be evaluated.

AB - The polar vortices play a central role in vertically coupling the atmosphere from the ground to geospace by shaping the background wind field through which atmospheric waves propagate. This work extends the vertical range of previous polar vortex climatologies into the upper mesosphere. The mesospheric polar vortices are defined using the CO gradient method with Microwave Limb Sounder satellite data; the stratospheric polar vortices are defined using a stream function-based algorithm with data from meteorological reanalyses. Strengths and weaknesses of the two vortex definitions are given, as well as recommendations for when, where, and why to use each definition. Midwinter mean vortex geometry in the mesosphere is funnel shaped in the Arctic, with a wide top and narrow bottom. The Antarctic mesospheric vortex tapers with height in early winter and broadens with height in late winter. The seasonal evolution of mesospheric vortex frequency of occurrence, size, and zonal symmetry in both hemispheres is presented. Unexpected behavior above 60 km includes late season vortex broadening in both hemispheres, especially following winters without sudden stratospheric warmings. Following extreme stratospheric disturbances the polar night jet in the mesosphere strengthens and shifts poleward, resulting in a mesospheric vortex that contracts. Overall, the mesospheric polar vortices are more similar between the two hemispheres than their stratospheric counterparts. The vortex climatology presented here serves as an observational benchmark to which the mesospheric polar vortices in high-top climate models can be evaluated.

UR - http://www.scopus.com/inward/record.url?scp=85052968309&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85052968309&partnerID=8YFLogxK

U2 - 10.1029/2018JD028815

DO - 10.1029/2018JD028815

M3 - Article

VL - 123

SP - 9171

EP - 9191

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 17

ER -