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...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Geophysical Union (AGU)
2022-06-01
|
| Series: | Journal of Advances in Modeling Earth Systems |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2021MS002593 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850187690163568640 |
|---|---|
| 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 |
| collection | DOAJ |
| 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 |
| id | doaj-art-65e047bb8705412daf4f21877dfd68aa |
| institution | OA Journals |
| issn | 1942-2466 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Journal of Advances in Modeling Earth Systems |
| spelling | doaj-art-65e047bb8705412daf4f21877dfd68aa2025-08-20T02:16:02ZengAmerican Geophysical Union (AGU)Journal of Advances in Modeling Earth Systems1942-24662022-06-01146n/an/a10.1029/2021MS002593Exploring the Dynamics of an Arctic Sea Ice Melt Event Using a Coupled Atmosphere‐Ocean Single‐Column Model (AOSCM)Kerstin Hartung0Gunilla Svensson1Jareth Holt2Anna Lewinschal3Michael Tjernström4Ludwig‐Maximilians‐Universität Munich Munich GermanyDepartment of Meteorology Stockholm University Stockholm SwedenDepartment of Meteorology Stockholm University Stockholm SwedenDepartment of Meteorology Stockholm University Stockholm SwedenDepartment of Meteorology Stockholm University Stockholm SwedenAbstract 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.https://doi.org/10.1029/2021MS002593parameter uncertaintysingle‐column model experimental setupatmosphere sea‐ice interactionArctic warm air intrusionArctic boundary layerArctic clouds |
| spellingShingle | 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) Journal of Advances in Modeling Earth Systems parameter uncertainty single‐column model experimental setup atmosphere sea‐ice interaction Arctic warm air intrusion Arctic boundary layer Arctic clouds |
| title | 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_short | 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 |
| topic | parameter uncertainty single‐column model experimental setup atmosphere sea‐ice interaction Arctic warm air intrusion Arctic boundary layer Arctic clouds |
| url | https://doi.org/10.1029/2021MS002593 |
| work_keys_str_mv | AT kerstinhartung exploringthedynamicsofanarcticseaicemelteventusingacoupledatmosphereoceansinglecolumnmodelaoscm AT gunillasvensson exploringthedynamicsofanarcticseaicemelteventusingacoupledatmosphereoceansinglecolumnmodelaoscm AT jarethholt exploringthedynamicsofanarcticseaicemelteventusingacoupledatmosphereoceansinglecolumnmodelaoscm AT annalewinschal exploringthedynamicsofanarcticseaicemelteventusingacoupledatmosphereoceansinglecolumnmodelaoscm AT michaeltjernstrom exploringthedynamicsofanarcticseaicemelteventusingacoupledatmosphereoceansinglecolumnmodelaoscm |