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- Title
Effects of strongly eddying oceans on multidecadal climate variability in the Community Earth System Model.
- Authors
Jüling, André; der Heydt, Anna von; Dijkstra, Henk A.
- Abstract
Climate variability on multidecadal time scales appears to be organized in pronounced patterns with clear expressions in sea surface temperature, such as the Atlantic Multidecadal Variability and the Pacific Decadal Oscillation. These patterns are now well studied both in observations and global climate models and are important in the attribution of climate change. Results from CMIP5 models have indicated large biases in these patterns with consequences for ocean heat storage variability and eventually the global mean surface temperature. In this paper, we use two multi-century Community Earth System Model simulations at coarse (1°) and fine (0.1°) ocean model horizontal grid spacing to study the effects of the representation of mesoscale ocean flows on major patterns of multidecadal variability. We find that resolving mesoscale ocean flows both improves the characteristics of the modes of variability with respect to observations and increases the amplitude of the heat content variability in the individual ocean basins. The effect on the global mean surface temperature is relatively minor.
- Subjects
OCEAN temperature; OCEAN; ENTHALPY; HEAT storage; SURFACE temperature
- Publication
Ocean Science Discussions, 2020, p1
- ISSN
1812-0806
- Publication type
Article
- DOI
10.5194/os-2020-85