On Atmospheric Energy Transport by Waves
Recently 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 at...
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UiT The Arctic University of Norway
2018
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ftunivtroemsoe:oai:munin.uit.no:10037/14825 2023-05-15T14:56:48+02:00 On Atmospheric Energy Transport by Waves Heiskanen, Tuomas Ilkka Henrikki 2018-12-14 https://hdl.handle.net/10037/14825 eng eng UiT The Arctic University of Norway UiT Norges arktiske universitet https://hdl.handle.net/10037/14825 openAccess Copyright 2018 The Author(s) VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 EOM-3901 Master thesis Mastergradsoppgave 2018 ftunivtroemsoe 2021-06-25T17:56:28Z Recently 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. Master Thesis Arctic University of Tromsø: Munin Open Research Archive Arctic |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 EOM-3901 |
spellingShingle |
VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 EOM-3901 Heiskanen, Tuomas Ilkka Henrikki On Atmospheric Energy Transport by Waves |
topic_facet |
VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 EOM-3901 |
description |
Recently 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. |
format |
Master Thesis |
author |
Heiskanen, Tuomas Ilkka Henrikki |
author_facet |
Heiskanen, Tuomas Ilkka Henrikki |
author_sort |
Heiskanen, Tuomas Ilkka Henrikki |
title |
On Atmospheric Energy Transport by Waves |
title_short |
On Atmospheric Energy Transport by Waves |
title_full |
On Atmospheric Energy Transport by Waves |
title_fullStr |
On Atmospheric Energy Transport by Waves |
title_full_unstemmed |
On Atmospheric Energy Transport by Waves |
title_sort |
on atmospheric energy transport by waves |
publisher |
UiT The Arctic University of Norway |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/14825 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://hdl.handle.net/10037/14825 |
op_rights |
openAccess Copyright 2018 The Author(s) |
_version_ |
1766328863679315968 |