Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming
The AURA-MLS daily mean temperatures and zonal wind from NASA-MERRA reanalysis for latitudes between 60° N and 80° N are used to investigate the planetary wave (PW) characteristics in the stratosphere and lower mesosphere during sudden stratospheric warming (SSW) (November 2008 to March 2009). Here,...
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ftcopernicus:oai:publications.copernicus.org:angeo16348 2023-05-15T15:03:14+02:00 Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming Kishore, P. Velicogna, I. Venkat Ratnam, M. Jiang, J. H. Madhavi, G. N. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-30-1529-2012 https://angeo.copernicus.org/articles/30/1529/2012/ eng eng doi:10.5194/angeo-30-1529-2012 https://angeo.copernicus.org/articles/30/1529/2012/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-30-1529-2012 2020-07-20T16:25:41Z The AURA-MLS daily mean temperatures and zonal wind from NASA-MERRA reanalysis for latitudes between 60° N and 80° N are used to investigate the planetary wave (PW) characteristics in the stratosphere and lower mesosphere during sudden stratospheric warming (SSW) (November 2008 to March 2009). Here, we used a novel method called empirical mode decomposition (EMD) to extract the PWs from the temperature data. The EMD is an interesting approach to decompose signals into locally periodic components, the intrinsic mode functions (IMFs), and will easily identify the embedded structures, even those with small amplitudes. The spectral analysis reveals prevailing planetary wave periods of ~6-day, ~8-day, ~15-day, and ~21–23-day in IMFs 1, 2, 3, and 4, respectively. Clear upward propagation of these waves (20–30 days) is observed, suggesting that sources for these oscillations are in the troposphere. Text Arctic Copernicus Publications: E-Journals Arctic Merra ENVELOPE(12.615,12.615,65.816,65.816) Annales Geophysicae 30 10 1529 1538 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The AURA-MLS daily mean temperatures and zonal wind from NASA-MERRA reanalysis for latitudes between 60° N and 80° N are used to investigate the planetary wave (PW) characteristics in the stratosphere and lower mesosphere during sudden stratospheric warming (SSW) (November 2008 to March 2009). Here, we used a novel method called empirical mode decomposition (EMD) to extract the PWs from the temperature data. The EMD is an interesting approach to decompose signals into locally periodic components, the intrinsic mode functions (IMFs), and will easily identify the embedded structures, even those with small amplitudes. The spectral analysis reveals prevailing planetary wave periods of ~6-day, ~8-day, ~15-day, and ~21–23-day in IMFs 1, 2, 3, and 4, respectively. Clear upward propagation of these waves (20–30 days) is observed, suggesting that sources for these oscillations are in the troposphere. |
format |
Text |
author |
Kishore, P. Velicogna, I. Venkat Ratnam, M. Jiang, J. H. Madhavi, G. N. |
spellingShingle |
Kishore, P. Velicogna, I. Venkat Ratnam, M. Jiang, J. H. Madhavi, G. N. Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming |
author_facet |
Kishore, P. Velicogna, I. Venkat Ratnam, M. Jiang, J. H. Madhavi, G. N. |
author_sort |
Kishore, P. |
title |
Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming |
title_short |
Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming |
title_full |
Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming |
title_fullStr |
Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming |
title_full_unstemmed |
Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming |
title_sort |
planetary waves in the upper stratosphere and lower mesosphere during 2009 arctic major stratospheric warming |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-30-1529-2012 https://angeo.copernicus.org/articles/30/1529/2012/ |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Arctic Merra |
geographic_facet |
Arctic Merra |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-30-1529-2012 https://angeo.copernicus.org/articles/30/1529/2012/ |
op_doi |
https://doi.org/10.5194/angeo-30-1529-2012 |
container_title |
Annales Geophysicae |
container_volume |
30 |
container_issue |
10 |
container_start_page |
1529 |
op_container_end_page |
1538 |
_version_ |
1766335115282087936 |