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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ftdoajarticles:oai:doaj.org/article:2b164bc2f8f94bac9f9bca33feefa6dc 2023-05-15T15:04:17+02:00 Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming P. Kishore I. Velicogna M. Venkat Ratnam J. H. Jiang G. N. Madhavi 2012-10-01T00:00:00Z https://doi.org/10.5194/angeo-30-1529-2012 https://doaj.org/article/2b164bc2f8f94bac9f9bca33feefa6dc EN eng Copernicus Publications https://www.ann-geophys.net/30/1529/2012/angeo-30-1529-2012.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-30-1529-2012 0992-7689 1432-0576 https://doaj.org/article/2b164bc2f8f94bac9f9bca33feefa6dc Annales Geophysicae, Vol 30, Pp 1529-1538 (2012) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2012 ftdoajarticles https://doi.org/10.5194/angeo-30-1529-2012 2022-12-31T01:36:17Z 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. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Merra ENVELOPE(12.615,12.615,65.816,65.816) Annales Geophysicae 30 10 1529 1538 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 P. Kishore I. Velicogna M. Venkat Ratnam J. H. Jiang G. N. Madhavi Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
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 |
Article in Journal/Newspaper |
author |
P. Kishore I. Velicogna M. Venkat Ratnam J. H. Jiang G. N. Madhavi |
author_facet |
P. Kishore I. Velicogna M. Venkat Ratnam J. H. Jiang G. N. Madhavi |
author_sort |
P. Kishore |
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 |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/angeo-30-1529-2012 https://doaj.org/article/2b164bc2f8f94bac9f9bca33feefa6dc |
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 |
Annales Geophysicae, Vol 30, Pp 1529-1538 (2012) |
op_relation |
https://www.ann-geophys.net/30/1529/2012/angeo-30-1529-2012.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-30-1529-2012 0992-7689 1432-0576 https://doaj.org/article/2b164bc2f8f94bac9f9bca33feefa6dc |
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 |
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1766336087745101824 |