Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations
Rising sea level driven by global warming is a serious threat to the coastal communities whose livelihoods depend on the coastal ecosystem. Hence, effective adaptation measures are needed to mitigate the predicted dangers of sea level rise. To be able to make informed decisions and develop successfu...
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Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky
2023
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ftsubhamburg:oai:ediss.sub.uni-hamburg.de:ediss/10809 2024-04-28T08:12:19+00:00 Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations Wickramage, Chathurika Hemamali Stammer, Detlef 2023-01-01 http://nbn-resolving.de/urn:nbn:de:gbv:18-ediss-116504 https://ediss.sub.uni-hamburg.de/handle/ediss/10809 eng eng Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky http://nbn-resolving.de/urn:nbn:de:gbv:18-ediss-116504 https://ediss.sub.uni-hamburg.de/handle/ediss/10809 http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess No license Sea level change Model comparison mesoscale model SSP5-8.5 scenario FAFMIP 500: Naturwissenschaften 30.99: Naturwissenschaften allgemein: Sonstiges Marine science ddc:500: doctoralThesis doc-type:doctoralThesis 2023 ftsubhamburg 2024-04-09T23:32:56Z Rising sea level driven by global warming is a serious threat to the coastal communities whose livelihoods depend on the coastal ecosystem. Hence, effective adaptation measures are needed to mitigate the predicted dangers of sea level rise. To be able to make informed decisions and develop successful adaptation strategies, accurate and reliable sea-level projections are essential for the coming decades. However, current climate models do not have the resolution to explicitly represent mesoscale processes in the ocean component; as a result, these processes are parameterized. The limited description of mesoscale processes in these models results in systematic errors in simulating ocean circulation properties, affecting the accuracy of sea-level projections. To study the dependence of future sea-level change on ocean model resolution, the dynamic sea level (DSL; sea surface height above the geoid) change patterns in a climate model featuring an eddy rich ocean component are compared to those of state-of-the-art coarser resolution versions of the same model. The study examines the impact of spatial resolution on sea level projections using Max Planck Institute Earth System Model (MPI-ESM) simulations. Three different spatial resolutions are taken into consideration: low resolution (LR) of about 1.5°, high resolution (HR) of 0.4°, and eddy-rich resolution (ER) of 0.1°. In the first part, the DSL changes for each configuration are analyzed by comparing the time mean of the SSP5-8.5 climate change scenario for the years 2080–2099 to the time mean of the historical simulation for the years 1995–2014. The ER model, which resolves mesoscale processes, projects a higher DSL increase in the North Atlantic sub-polar region, the Kuroshio region, and the Arctic Ocean compared with models with parameterized eddies (HR and LR). In addition, a smaller DSL increase is observed in the band at 40°S in the Southern Ocean, compared to HR and LR models. The differences between the two model categories, in these regions, can be ... Doctoral or Postdoctoral Thesis Arctic Arctic Ocean Climate change Global warming North Atlantic Southern Ocean ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky) |
institution |
Open Polar |
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ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky) |
op_collection_id |
ftsubhamburg |
language |
English |
topic |
Sea level change Model comparison mesoscale model SSP5-8.5 scenario FAFMIP 500: Naturwissenschaften 30.99: Naturwissenschaften allgemein: Sonstiges Marine science ddc:500: |
spellingShingle |
Sea level change Model comparison mesoscale model SSP5-8.5 scenario FAFMIP 500: Naturwissenschaften 30.99: Naturwissenschaften allgemein: Sonstiges Marine science ddc:500: Wickramage, Chathurika Hemamali Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations |
topic_facet |
Sea level change Model comparison mesoscale model SSP5-8.5 scenario FAFMIP 500: Naturwissenschaften 30.99: Naturwissenschaften allgemein: Sonstiges Marine science ddc:500: |
description |
Rising sea level driven by global warming is a serious threat to the coastal communities whose livelihoods depend on the coastal ecosystem. Hence, effective adaptation measures are needed to mitigate the predicted dangers of sea level rise. To be able to make informed decisions and develop successful adaptation strategies, accurate and reliable sea-level projections are essential for the coming decades. However, current climate models do not have the resolution to explicitly represent mesoscale processes in the ocean component; as a result, these processes are parameterized. The limited description of mesoscale processes in these models results in systematic errors in simulating ocean circulation properties, affecting the accuracy of sea-level projections. To study the dependence of future sea-level change on ocean model resolution, the dynamic sea level (DSL; sea surface height above the geoid) change patterns in a climate model featuring an eddy rich ocean component are compared to those of state-of-the-art coarser resolution versions of the same model. The study examines the impact of spatial resolution on sea level projections using Max Planck Institute Earth System Model (MPI-ESM) simulations. Three different spatial resolutions are taken into consideration: low resolution (LR) of about 1.5°, high resolution (HR) of 0.4°, and eddy-rich resolution (ER) of 0.1°. In the first part, the DSL changes for each configuration are analyzed by comparing the time mean of the SSP5-8.5 climate change scenario for the years 2080–2099 to the time mean of the historical simulation for the years 1995–2014. The ER model, which resolves mesoscale processes, projects a higher DSL increase in the North Atlantic sub-polar region, the Kuroshio region, and the Arctic Ocean compared with models with parameterized eddies (HR and LR). In addition, a smaller DSL increase is observed in the band at 40°S in the Southern Ocean, compared to HR and LR models. The differences between the two model categories, in these regions, can be ... |
author2 |
Stammer, Detlef |
format |
Doctoral or Postdoctoral Thesis |
author |
Wickramage, Chathurika Hemamali |
author_facet |
Wickramage, Chathurika Hemamali |
author_sort |
Wickramage, Chathurika Hemamali |
title |
Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations |
title_short |
Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations |
title_full |
Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations |
title_fullStr |
Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations |
title_full_unstemmed |
Sensitivity of the sea level change to model resolution in Max Planck Institute Earth System Model (MPI-ESM) simulations |
title_sort |
sensitivity of the sea level change to model resolution in max planck institute earth system model (mpi-esm) simulations |
publisher |
Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky |
publishDate |
2023 |
url |
http://nbn-resolving.de/urn:nbn:de:gbv:18-ediss-116504 https://ediss.sub.uni-hamburg.de/handle/ediss/10809 |
genre |
Arctic Arctic Ocean Climate change Global warming North Atlantic Southern Ocean |
genre_facet |
Arctic Arctic Ocean Climate change Global warming North Atlantic Southern Ocean |
op_relation |
http://nbn-resolving.de/urn:nbn:de:gbv:18-ediss-116504 https://ediss.sub.uni-hamburg.de/handle/ediss/10809 |
op_rights |
http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess No license |
_version_ |
1797579219340886016 |