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dc.contributor.authorHeiskanen, Tuomas Ilkka Henrikki
dc.contributor.authorGraversen, Rune Grand
dc.contributor.authorRydsaa, Johanne Hope
dc.contributor.authorIsachsen, Pål Erik
dc.date.accessioned2021-01-08T11:49:20Z
dc.date.available2021-01-08T11:49:20Z
dc.date.issued2020-05-04
dc.description.abstractThe 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.en_US
dc.identifier.citationHeiskanen, Graversen, Rydsaa, Isachsen. Comparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary components. Quarterly Journal of the Royal Meteorological Society. 2020en_US
dc.identifier.cristinIDFRIDAID 1813979
dc.identifier.doi10.1002/qj.3813
dc.identifier.issn0035-9009
dc.identifier.issn1477-870X
dc.identifier.urihttps://hdl.handle.net/10037/20229
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.ispartofHeiskanen, T.I.H. (2022). On the linkage between atmospheric circulation changes and Arctic climate change. (Doctoral thesis). <a href=https://hdl.handle.net/10037/25297>https://hdl.handle.net/10037/25297</a>
dc.relation.journalQuarterly Journal of the Royal Meteorological Society
dc.relation.projectIDNotur/NorStore: nn9384ken_US
dc.relation.projectIDNotur/NorStore: ns9063ken_US
dc.relation.projectIDNorges forskningsråd: 280727en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/280727/Norway/The role of the atmospheric energy transport in recent Arctic climate change//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US
dc.titleComparing wavelet and Fourier perspectives on the decomposition of meridional energy transport into synoptic and planetary componentsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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