The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability
The Arctic sea-ice extent has strongly declined over recent decades. A large inter-annual variability is superimposed on this negative trend. Previous studies have emphasised a significant warming effect associated with latent energy transport into the Arctic region, in particular due to an enhanced...
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Online Access: | https://hdl.handle.net/10037/25968 https://doi.org/10.1007/s00382-022-06145-z |
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ftunivtroemsoe:oai:munin.uit.no:10037/25968 2023-05-15T14:25:17+02:00 The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability Hofsteenge, Marte G. Graversen, Rune Grand Rydsaa, Johanne Hope Rey, Zoé 2022-01-17 https://hdl.handle.net/10037/25968 https://doi.org/10.1007/s00382-022-06145-z eng eng Springer Climate Dynamics Sigma2: ns9063k Norges forskningsråd: 280727 Sigma2: nn9348k Hofsteenge, Graversen, Rydsaa, Rey. The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability. Climate Dynamics. 2022 FRIDAID 2021747 doi:10.1007/s00382-022-06145-z 0930-7575 1432-0894 https://hdl.handle.net/10037/25968 openAccess Copyright 2022 The Author(s) Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.1007/s00382-022-06145-z 2022-08-10T22:59:59Z The Arctic sea-ice extent has strongly declined over recent decades. A large inter-annual variability is superimposed on this negative trend. Previous studies have emphasised a significant warming effect associated with latent energy transport into the Arctic region, in particular due to an enhanced greenhouse effect associated with the convergence of the humidity transport over the Arctic. The atmospheric energy transport into the Arctic is mostly accomplished by waves such as Rossby waves and cyclones. Here we present a systematic study of the effect on Arctic sea ice of these atmospheric wave types. Through a regression analysis we investigate the coupling between transport anomalies of both latent and dry-static energy and sea-ice anomalies. From the state-of-the-art ERA5 reanalysis product the latent and dry-static transport over the Arctic boundary (70 ∘ N) is calculated. The transport is then split into transport by planetary and synoptic-scale waves using a Fourier decomposition. The results show that latent energy transport as compared to that of dry-static shows a much stronger potential to decrease sea ice concentration. However, taking into account that the variability of dry-static transport is of an order of magnitude larger than latent, the actual impact on the sea ice appears similar for the two components. In addition, the energy transport by planetary waves causes a strong decline of the sea ice concentration whereas the transport by synoptic-scale waves shows only little effect on the sea ice. The study emphasises the importance of the large-scale waves on the sea ice variability. Article in Journal/Newspaper Arctic Arctic Sea ice University of Tromsø: Munin Open Research Archive Arctic Climate Dynamics 59 1-2 579 594 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
The Arctic sea-ice extent has strongly declined over recent decades. A large inter-annual variability is superimposed on this negative trend. Previous studies have emphasised a significant warming effect associated with latent energy transport into the Arctic region, in particular due to an enhanced greenhouse effect associated with the convergence of the humidity transport over the Arctic. The atmospheric energy transport into the Arctic is mostly accomplished by waves such as Rossby waves and cyclones. Here we present a systematic study of the effect on Arctic sea ice of these atmospheric wave types. Through a regression analysis we investigate the coupling between transport anomalies of both latent and dry-static energy and sea-ice anomalies. From the state-of-the-art ERA5 reanalysis product the latent and dry-static transport over the Arctic boundary (70 ∘ N) is calculated. The transport is then split into transport by planetary and synoptic-scale waves using a Fourier decomposition. The results show that latent energy transport as compared to that of dry-static shows a much stronger potential to decrease sea ice concentration. However, taking into account that the variability of dry-static transport is of an order of magnitude larger than latent, the actual impact on the sea ice appears similar for the two components. In addition, the energy transport by planetary waves causes a strong decline of the sea ice concentration whereas the transport by synoptic-scale waves shows only little effect on the sea ice. The study emphasises the importance of the large-scale waves on the sea ice variability. |
format |
Article in Journal/Newspaper |
author |
Hofsteenge, Marte G. Graversen, Rune Grand Rydsaa, Johanne Hope Rey, Zoé |
spellingShingle |
Hofsteenge, Marte G. Graversen, Rune Grand Rydsaa, Johanne Hope Rey, Zoé The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability |
author_facet |
Hofsteenge, Marte G. Graversen, Rune Grand Rydsaa, Johanne Hope Rey, Zoé |
author_sort |
Hofsteenge, Marte G. |
title |
The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability |
title_short |
The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability |
title_full |
The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability |
title_fullStr |
The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability |
title_full_unstemmed |
The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability |
title_sort |
impact of atmospheric rossby waves and cyclones on the arctic sea ice variability |
publisher |
Springer |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/25968 https://doi.org/10.1007/s00382-022-06145-z |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Sea ice |
genre_facet |
Arctic Arctic Sea ice |
op_relation |
Climate Dynamics Sigma2: ns9063k Norges forskningsråd: 280727 Sigma2: nn9348k Hofsteenge, Graversen, Rydsaa, Rey. The impact of atmospheric Rossby waves and cyclones on the Arctic sea ice variability. Climate Dynamics. 2022 FRIDAID 2021747 doi:10.1007/s00382-022-06145-z 0930-7575 1432-0894 https://hdl.handle.net/10037/25968 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.1007/s00382-022-06145-z |
container_title |
Climate Dynamics |
container_volume |
59 |
container_issue |
1-2 |
container_start_page |
579 |
op_container_end_page |
594 |
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1766297714311561216 |