"Eddy Properties and Impacts in the Changing Arctic" (EPICA) is a BMBF funded project that will use high-resolution modeling and observations to understand the properties and impacts of (sub)mesoscale eddies in the Arctic Ocean, especially in the MOSAiC period in comparison with the past. Interactions of the ocean with the atmosphere and sea ice, as well as mixing and transport of water masses in the ocean, are governed by numerous small-scale turbulent processes. In particular, mesoscale and submesoscale eddies are important features that shape the ocean hydrography and influence the mixed layer dynamics. However, their properties and precise roles in the Arctic Ocean are still poorly understood, with serious implications for our understanding of Arctic Ocean dynamics and for the realism of eddy parameterizations in climate models.
The proposed project will combine the high-resolution modelling capabilities offered by the multi-resolution Finite volumE Sea ice-Ocean Model (FESOM) with the unique year-round data collected during the MOSAiC campaign. We will synthesize the observational data with model results to study processes forming eddies, understand the importance of eddies for the ocean, sea ice and air-sea exchange, estimate ocean internal variability relative to forced variability, and derive eddy diffusivity which can help to improve eddy parameterizations, thus the fidelity of climate models. The resolution of the global model will be increased to 1 km in the whole Arctic Ocean and further refined to subkilometer scales at the MOSAiC sites. The decades-long eddy-resolving model results for the Arctic Ocean and the well-evaluated and documented km-scale model configuration will be delivered to the broad community, which can be used to advance the understanding, prediction and projection of Arctic climate. Within this project we collaborate with the Physical Oceanography Section, which is responsible for analyzing related MOSAiC observations.
Qiang Wang | Benjamin Rabe | Ivan Kuznetsov | Dmitry Sein | Sergey Danilov | Thomas Jung | Nikolay Koldunov | Patrick Scholz | Dmitry Sidorenko | Claudia Wekerle