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Lukianova, R., Kozlovsky, A., & Lester, M. (2021). Upper stratosphere-mesosphere-lower thermosphere perturbations during the formation of the Arctic polar night jet in 2019–2020. Geophysical Research Letters, 48, e2021GL094926. https://doi.org/10.1029/2021GL094926

Upper stratosphere-mesosphere-lower thermosphere perturbations during the formation of the Arctic polar night jet in 2019–2020

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Author: Lukianova, Renata1,2; Kozlovsky, Alexander3; Lester, Mark4
Organizations: 1Space Research Institute RAS, Moscow, Russia
2Institute of Earth Science, Saint-Petersburg State University, Saint- Petersburg, Russia
3Sodankylä Geophysical Observatory, Sodankylä, Finland
4Department of Physics and Astronomy, University of Leicester, Leicester, UK
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.8 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2021121360206
Language: English
Published: American Geophysical Union, 2021
Publish Date: 2022-03-30
Description:

Abstract

Thermal and dynamic perturbations in the polar upper stratospheric/mesosphere-lower thermosphere in the Arctic winter of 2019–2020 as measured by a meteor radar at 67°N, Aura Microwave Limb Sounder and reanalysis are presented. The most severe disturbances occur from late December to mid-January, while the rest of the winter is relatively stable. Mesospheric winds are dominated by several impulsive increases in the zonal component, an abrupt descent of the wind core and alternating north- and south-ward flow with a period of half a month. Reduced temperature at 90 km height accompanied by thermal inversions is observed in association with upper stratosphere/lower mesosphere warming in the eastern hemisphere. The warming trend is interrupted by a strong cooling in the entire stratosphere-mesosphere. The upper middle atmosphere appears considerably stratified. High “walls” surround the vortex that is favorable for its stability.

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Series: Geophysical research letters
ISSN: 0094-8276
ISSN-E: 1944-8007
ISSN-L: 0094-8276
Volume: 48
Issue: 19
Article number: e2021GL094926
DOI: 10.1029/2021GL094926
OADOI: https://oadoi.org/10.1029/2021GL094926
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Subjects:
Funding: R. Lukianova acknowledges support from the Academy of Finland via grant 339849. M. Lester acknowledges support from STFC grant ST/S000429/1.
Dataset Reference: NASA MERRA-2 data are available from NASA's GES DISC web-based system Giovanni (https://giovanni.gsfc.nasa.gov/giovanni/); AURA MLS temperature data are available from the Open-source Project for a Network Data Access Protocol (OPeNDAP) (https://acdisc.gesdisc.eosdis.nasa.gov/opendap/hyrax/HDF-EOS5/Aura_MLS_Level2/ML2T.004); the data from the Sodankyla Geophysical Observatory Meteor radar are available at https://www.sgo.fi/Data/observations.php.
  https://giovanni.gsfc.nasa.gov/giovanni/
https://acdisc.gesdisc.eosdis.nasa.gov/opendap/hyrax/HDF-EOS5/Aura_MLS_Level2/ML2T.004
https://www.sgo.fi/Data/observations.php
Copyright information: © 2021. American Geophysical Union.