Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM)
Abstract The Arctic climate system is host to many processes which interact vertically over the tightly coupled atmosphere, sea ice and ocean. The coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) allows to decouple local small‐scale and large‐scale processes to investigate the model performance...
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American Geophysical Union (AGU)
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ftdoajarticles:oai:doaj.org/article:65e047bb8705412daf4f21877dfd68aa 2023-05-15T14:43:21+02:00 Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) Kerstin Hartung Gunilla Svensson Jareth Holt Anna Lewinschal Michael Tjernström 2022-06-01T00:00:00Z https://doi.org/10.1029/2021MS002593 https://doaj.org/article/65e047bb8705412daf4f21877dfd68aa EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2021MS002593 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2021MS002593 https://doaj.org/article/65e047bb8705412daf4f21877dfd68aa Journal of Advances in Modeling Earth Systems, Vol 14, Iss 6, Pp n/a-n/a (2022) parameter uncertainty single‐column model experimental setup atmosphere sea‐ice interaction Arctic warm air intrusion Arctic boundary layer Arctic clouds Physical geography GB3-5030 Oceanography GC1-1581 article 2022 ftdoajarticles https://doi.org/10.1029/2021MS002593 2022-12-30T23:17:13Z Abstract The Arctic climate system is host to many processes which interact vertically over the tightly coupled atmosphere, sea ice and ocean. The coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) allows to decouple local small‐scale and large‐scale processes to investigate the model performance in an idealized setting. Here, an observed Arctic warm air intrusion event is used to show how to identify model deficiencies using the AOSCM. The AOSCM allows us to effectively produce a large number of perturbation simulations, around 1,000, to map sensitivities of the model results due to changes in physical and model properties as well as to the large‐scale tendencies. The analysis of the summary diagnostics, that is, aggregated results from sensitivity experiments evaluated against modeled physical properties, such as surface energy budget and mean sea ice thickness, reveals sensitivities to the chosen parameters. Further, we discuss how the conclusions can be used to understand the behavior of the global host model. The simulations confirm that the horizontal advection of heat and moisture plays an important role for maintaining a low‐level cloud cover, as in earlier studies. The combined cloud layers increase the energy input to the surface, which in turn enhances the ongoing melt. The clouds present an additional sensitivity in terms of how they are represented but also their interaction with the large‐scale advection and the model time step. The methodology can be used for a variety of other regions, where the coupling to the ocean is important. Article in Journal/Newspaper Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Journal of Advances in Modeling Earth Systems 14 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
parameter uncertainty single‐column model experimental setup atmosphere sea‐ice interaction Arctic warm air intrusion Arctic boundary layer Arctic clouds Physical geography GB3-5030 Oceanography GC1-1581 |
spellingShingle |
parameter uncertainty single‐column model experimental setup atmosphere sea‐ice interaction Arctic warm air intrusion Arctic boundary layer Arctic clouds Physical geography GB3-5030 Oceanography GC1-1581 Kerstin Hartung Gunilla Svensson Jareth Holt Anna Lewinschal Michael Tjernström Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) |
topic_facet |
parameter uncertainty single‐column model experimental setup atmosphere sea‐ice interaction Arctic warm air intrusion Arctic boundary layer Arctic clouds Physical geography GB3-5030 Oceanography GC1-1581 |
description |
Abstract The Arctic climate system is host to many processes which interact vertically over the tightly coupled atmosphere, sea ice and ocean. The coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) allows to decouple local small‐scale and large‐scale processes to investigate the model performance in an idealized setting. Here, an observed Arctic warm air intrusion event is used to show how to identify model deficiencies using the AOSCM. The AOSCM allows us to effectively produce a large number of perturbation simulations, around 1,000, to map sensitivities of the model results due to changes in physical and model properties as well as to the large‐scale tendencies. The analysis of the summary diagnostics, that is, aggregated results from sensitivity experiments evaluated against modeled physical properties, such as surface energy budget and mean sea ice thickness, reveals sensitivities to the chosen parameters. Further, we discuss how the conclusions can be used to understand the behavior of the global host model. The simulations confirm that the horizontal advection of heat and moisture plays an important role for maintaining a low‐level cloud cover, as in earlier studies. The combined cloud layers increase the energy input to the surface, which in turn enhances the ongoing melt. The clouds present an additional sensitivity in terms of how they are represented but also their interaction with the large‐scale advection and the model time step. The methodology can be used for a variety of other regions, where the coupling to the ocean is important. |
format |
Article in Journal/Newspaper |
author |
Kerstin Hartung Gunilla Svensson Jareth Holt Anna Lewinschal Michael Tjernström |
author_facet |
Kerstin Hartung Gunilla Svensson Jareth Holt Anna Lewinschal Michael Tjernström |
author_sort |
Kerstin Hartung |
title |
Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) |
title_short |
Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) |
title_full |
Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) |
title_fullStr |
Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) |
title_full_unstemmed |
Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM) |
title_sort |
exploring the dynamics of an arctic sea ice melt event using a coupled atmosphere‐ocean single‐column model (aoscm) |
publisher |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021MS002593 https://doaj.org/article/65e047bb8705412daf4f21877dfd68aa |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Journal of Advances in Modeling Earth Systems, Vol 14, Iss 6, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1029/2021MS002593 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2021MS002593 https://doaj.org/article/65e047bb8705412daf4f21877dfd68aa |
op_doi |
https://doi.org/10.1029/2021MS002593 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
14 |
container_issue |
6 |
_version_ |
1766315021336313856 |