Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components
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 import...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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ftoslouniv:oai:www.duo.uio.no:10852/82090 2023-05-15T14:42:02+02:00 Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components Heiskanen, Tuomas Ilkka Henrikki Graversen, Rune Grand Rydsaa, Johanne Hope Isachsen, Pål Erik 2020-06-05T10:05:35Z http://hdl.handle.net/10852/82090 http://urn.nb.no/URN:NBN:no-85013 https://doi.org/10.1002/qj.3813 EN eng NOTUR/NORSTORE/nn9384k NOTUR/NORSTORE/ns9063k NFR/280727 http://urn.nb.no/URN:NBN:no-85013 Heiskanen, Tuomas Ilkka Henrikki 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. Quarterly Journal of the Royal Meteorological Society. 2020 http://hdl.handle.net/10852/82090 1813979 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Quarterly Journal of the Royal Meteorological Society&rft.volume=&rft.spage=&rft.date=2020 Quarterly Journal of the Royal Meteorological Society 146 731 2717 2730 https://doi.org/10.1002/qj.3813 URN:NBN:no-85013 Fulltext https://www.duo.uio.no/bitstream/handle/10852/82090/2/article98404.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0035-9009 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2020 ftoslouniv https://doi.org/10.1002/qj.3813 2021-01-13T23:30:58Z 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 Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Quarterly Journal of the Royal Meteorological Society 146 731 2717 2730 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Heiskanen, Tuomas Ilkka Henrikki Graversen, Rune Grand Rydsaa, Johanne Hope Isachsen, Pål Erik |
spellingShingle |
Heiskanen, Tuomas Ilkka Henrikki 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 Ilkka Henrikki Graversen, Rune Grand Rydsaa, Johanne Hope Isachsen, Pål Erik |
author_sort |
Heiskanen, Tuomas Ilkka Henrikki |
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 |
publishDate |
2020 |
url |
http://hdl.handle.net/10852/82090 http://urn.nb.no/URN:NBN:no-85013 https://doi.org/10.1002/qj.3813 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Sea ice |
genre_facet |
Arctic Climate change Sea ice |
op_source |
0035-9009 |
op_relation |
NOTUR/NORSTORE/nn9384k NOTUR/NORSTORE/ns9063k NFR/280727 http://urn.nb.no/URN:NBN:no-85013 Heiskanen, Tuomas Ilkka Henrikki 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. Quarterly Journal of the Royal Meteorological Society. 2020 http://hdl.handle.net/10852/82090 1813979 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Quarterly Journal of the Royal Meteorological Society&rft.volume=&rft.spage=&rft.date=2020 Quarterly Journal of the Royal Meteorological Society 146 731 2717 2730 https://doi.org/10.1002/qj.3813 URN:NBN:no-85013 Fulltext https://www.duo.uio.no/bitstream/handle/10852/82090/2/article98404.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
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 |
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1766313697464025088 |