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
|Author:||Lukianova, Renata1,2; Kozlovsky, Alexander3; Lester, Mark4|
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
|Online Access:||PDF Full Text (PDF, 0.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2021121360206
American Geophysical Union,
|Publish Date:|| 2022-03-30
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.
Geophysical research letters
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
115 Astronomy and space science
R. Lukianova acknowledges support from the Academy of Finland via grant 339849. M. Lester acknowledges support from STFC grant ST/S000429/1.
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.
© 2021. American Geophysical Union.