Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components
Abstract The Arctic region shows some of the world's most significant signs of climate change; for instance, a negative trend in summer sea‐ice cover of around 15% per decade and Arctic amplified surface‐air warming that is three times the global average. The atmospheric energy transport plays...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1002/qj.3813 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.3813 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3813 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.3813 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3813 |
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crwiley:10.1002/qj.3813 2024-06-02T08:00:50+00:00 Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components Heiskanen, Tuomas Graversen, Rune Grand Rydsaa, Johanne Hope Isachsen, Pål Erik Norges Forskningsråd 2020 http://dx.doi.org/10.1002/qj.3813 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.3813 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3813 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.3813 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3813 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Quarterly Journal of the Royal Meteorological Society volume 146, issue 731, page 2717-2730 ISSN 0035-9009 1477-870X journal-article 2020 crwiley https://doi.org/10.1002/qj.3813 2024-05-03T10:49:54Z Abstract The Arctic region shows some of the world's most significant signs of climate change; for instance, a negative trend in summer sea‐ice cover of around 15% per decade and Arctic amplified surface‐air warming that is three times the global average. The atmospheric energy transport plays an important role in the Arctic climate. Recently a Fourier‐based method for studying the atmospheric energy transport contribution by planetary‐ and synoptic‐scale waves has been proposed. Recent studies based on this method show that planetary waves contribute more than synoptic waves to the atmospheric energy transport into the Arctic. However, this Fourier method suffers from being incapable of resolving spatially localized systems such as cyclones. Here an attempt to evaluate this problem is presented by applying the method on synthetic and reanalysis data. In addition, an alternative method based on a wavelet decomposition is proposed and compared with the Fourier‐based method. The wavelet method is based on localized basis functions which should be capable of resolving these localized systems. The wavelet method shows an impact of synoptic‐scale transport on Arctic temperatures which is not captured by the Fourier method, whilst the planetary‐scale effect of both methods appears similar. Article in Journal/Newspaper Arctic Climate change Sea ice Wiley Online Library Arctic Quarterly Journal of the Royal Meteorological Society 146 731 2717 2730 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The Arctic region shows some of the world's most significant signs of climate change; for instance, a negative trend in summer sea‐ice cover of around 15% per decade and Arctic amplified surface‐air warming that is three times the global average. The atmospheric energy transport plays an important role in the Arctic climate. Recently a Fourier‐based method for studying the atmospheric energy transport contribution by planetary‐ and synoptic‐scale waves has been proposed. Recent studies based on this method show that planetary waves contribute more than synoptic waves to the atmospheric energy transport into the Arctic. However, this Fourier method suffers from being incapable of resolving spatially localized systems such as cyclones. Here an attempt to evaluate this problem is presented by applying the method on synthetic and reanalysis data. In addition, an alternative method based on a wavelet decomposition is proposed and compared with the Fourier‐based method. The wavelet method is based on localized basis functions which should be capable of resolving these localized systems. The wavelet method shows an impact of synoptic‐scale transport on Arctic temperatures which is not captured by the Fourier method, whilst the planetary‐scale effect of both methods appears similar. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Heiskanen, Tuomas Graversen, Rune Grand Rydsaa, Johanne Hope Isachsen, Pål Erik |
spellingShingle |
Heiskanen, Tuomas Graversen, Rune Grand Rydsaa, Johanne Hope Isachsen, Pål Erik Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components |
author_facet |
Heiskanen, Tuomas Graversen, Rune Grand Rydsaa, Johanne Hope Isachsen, Pål Erik |
author_sort |
Heiskanen, Tuomas |
title |
Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components |
title_short |
Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components |
title_full |
Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components |
title_fullStr |
Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components |
title_full_unstemmed |
Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components |
title_sort |
comparing wavelet and fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/qj.3813 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.3813 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3813 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.3813 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3813 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Sea ice |
genre_facet |
Arctic Climate change Sea ice |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 146, issue 731, page 2717-2730 ISSN 0035-9009 1477-870X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/qj.3813 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
146 |
container_issue |
731 |
container_start_page |
2717 |
op_container_end_page |
2730 |
_version_ |
1800745026822602752 |