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dc.contributor.advisorGraversen, Rune
dc.contributor.advisorRydsaa, Johanne Hope
dc.contributor.authorHeiskanen, Tuomas Ilkka Henrikki
dc.date.accessioned2019-03-05T08:45:10Z
dc.date.available2019-03-05T08:45:10Z
dc.date.issued2018-12-14
dc.description.abstractRecently a new method, based on a Fourier decomposition in the zonal direction, for studying the atmospheric energy transport contribution by planetary and cyclone scale waves has been proposed. Recent studies based on this show that planetary waves contribute more than cyclone scale waves to the atmospheric energy transport into the Arctic. The planetary waves contribute to the Arctic amplification through latent heat transport, even when the total atmospheric energy transport is decreasing in model projections. However, the performance of the energy split method to capture transports by cyclone and planetary scale waves has not yet been evaluated. Here an attempt to evaluate the performance of the energy split method is presented. The energy split method is applied on synthetic data, where the wave structure and energy transport are known. This leads to a potential error in the energy split methods resolution of transport associated with synthetic isolated cyclones, transport is contributed to planetary waves in the Fourier spectra. When applied on atmospheric reanalysis data where only isolated cyclones are present in atmospheric state it is evident that more than 80% (70%) of the transport of dry static energy (latent heat) is contributed by planetary waves. From inspections of the vertically integrated energy transport field it is evident that the latent heat transport of cyclones is large compared to the climatology, which implies that there is a problem with the energy split method when the atmospheric state is characterized by an isolated cyclone scale wave, and that the error is especially important to consider for the latent heat transport into the Arctic. Further investigations are proposed to estimate the upper bound of the error introduced in the energy split method.en_US
dc.identifier.urihttps://hdl.handle.net/10037/14825
dc.language.isoengen_US
dc.publisherUiT The Arctic University of Norwayen_US
dc.publisherUiT Norges arktiske universiteten_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2018 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/3.0en_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)en_US
dc.subject.courseIDEOM-3901
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453en_US
dc.titleOn Atmospheric Energy Transport by Wavesen_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


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Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)