Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity
Climate models like the coupled Arctic atmosphere-ocean-sea ice model HIRHAM-NAOSIM are helpful to gain a deeper understanding of Arctic Amplification and interactions between atmosphere, ocean and sea ice. HIRHAM-NAOSIM is evaluated in Arctic winter compared to data from the MOSAiC expedition for F...
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ftzenodo:oai:zenodo.org:7693669 2023-05-15T14:42:12+02:00 Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity Röntgen, Leonie 2023-03-02 https://zenodo.org/record/7693669 https://doi.org/10.5281/zenodo.7693669 eng eng doi:10.5281/zenodo.7693668 https://zenodo.org/record/7693669 https://doi.org/10.5281/zenodo.7693669 oai:zenodo.org:7693669 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/3.0/de/legalcode info:eu-repo/semantics/doctoralThesis publication-thesis 2023 ftzenodo https://doi.org/10.5281/zenodo.769366910.5281/zenodo.7693668 2023-03-11T03:17:32Z Climate models like the coupled Arctic atmosphere-ocean-sea ice model HIRHAM-NAOSIM are helpful to gain a deeper understanding of Arctic Amplification and interactions between atmosphere, ocean and sea ice. HIRHAM-NAOSIM is evaluated in Arctic winter compared to data from the MOSAiC expedition for February 2020. A warm surface temperature bias of more than 5°C during clear-sky conditions is discussed in terms of modeled surface energy budget, clouds and atmospheric stability. HIRHAM-NAOSIM's control run underestimates the stable atmospheric stratification and has a positive bias in liquid water path and longwave radiation during observed clear-sky time periods. Though the positive longwave radiative bias outweighs the impact of a changed snow thermal conductivity and the positive temperature bias during radiatively clear state remains, a halved conductivity of 0.15 Wm-1K-1 reduces the simulated surface temperature by up to 5°C and causes a higher occurrence of stable atmospheric conditions. Doctoral or Postdoctoral Thesis Arctic Sea ice Zenodo Arctic |
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English |
description |
Climate models like the coupled Arctic atmosphere-ocean-sea ice model HIRHAM-NAOSIM are helpful to gain a deeper understanding of Arctic Amplification and interactions between atmosphere, ocean and sea ice. HIRHAM-NAOSIM is evaluated in Arctic winter compared to data from the MOSAiC expedition for February 2020. A warm surface temperature bias of more than 5°C during clear-sky conditions is discussed in terms of modeled surface energy budget, clouds and atmospheric stability. HIRHAM-NAOSIM's control run underestimates the stable atmospheric stratification and has a positive bias in liquid water path and longwave radiation during observed clear-sky time periods. Though the positive longwave radiative bias outweighs the impact of a changed snow thermal conductivity and the positive temperature bias during radiatively clear state remains, a halved conductivity of 0.15 Wm-1K-1 reduces the simulated surface temperature by up to 5°C and causes a higher occurrence of stable atmospheric conditions. |
format |
Doctoral or Postdoctoral Thesis |
author |
Röntgen, Leonie |
spellingShingle |
Röntgen, Leonie Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity |
author_facet |
Röntgen, Leonie |
author_sort |
Röntgen, Leonie |
title |
Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity |
title_short |
Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity |
title_full |
Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity |
title_fullStr |
Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity |
title_full_unstemmed |
Performance of a Coupled Arctic Climate Model Compared to MOSAiC Observations and its Sensitivity to a Change in Snow Thermal Conductivity |
title_sort |
performance of a coupled arctic climate model compared to mosaic observations and its sensitivity to a change in snow thermal conductivity |
publishDate |
2023 |
url |
https://zenodo.org/record/7693669 https://doi.org/10.5281/zenodo.7693669 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
doi:10.5281/zenodo.7693668 https://zenodo.org/record/7693669 https://doi.org/10.5281/zenodo.7693669 oai:zenodo.org:7693669 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/3.0/de/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.769366910.5281/zenodo.7693668 |
_version_ |
1766313897298493440 |