Changes of mesoscale eddy activity in the Eurasian Basin from 1-km simulations

• DOI: 10.5194/egusphere-egu24-8828
• Publication Date: 2024-03-08T18:18:58Z
• Authors: Vasco Müller; Qiang Wang; Nikolay Koldunov; Sergey Danilov; Xinyue Li; Caili Liu; Thomas Jung

Mesoscale eddies play a crucial role in shaping the dynamics of Arctic Ocean, making them essential for understanding future changes and ongoing 'Atlantification' region. In this study, we use simulations generated by unstructured-mesh Finite volumE Sea ice-Ocean Model (FESOM2) with 1-km horizontal resolution Ocean. Our investigation includes multiple simulations, namely seven-year run representing present-day climate slice simulation end 21st century, representative 4°C warmer world. Through these evaluate Eddy Kinetic Energy (EKE) within Eurasian Basin analyze their correlation factors like sea-ice cover, baroclinic conversion rate, stratification. To deepen our understanding, combine Eulerian properties EKE rate Lagrangian obtained from an algorithm that automatically identifies tracks using vector geometry. findings end-of-century indicate significant increase eddy activity future, accompanied retreating sea ice. The reveals seasonality is mainly influenced ice, distinct drivers at different depth levels monthly anomalies. mixed layer shows robust connection to ice variability, while deeper levels, protected stratification, are more significantly conversion.