Vertical variability of the intensity of the frontal zones of the Norwegian Sea

The Norwegian Sea is the meeting place of warm and salty Atlantic waters with cold fresh Arctic waters. thermal haline frontal zones (FZs) formed as a result this interaction are areas increased horizontal gradients physical, chemical, biological parameters, have significant impact on regional circulation. Many mesoscale eddies generated in FZs which actively involved eddy dynamics Sea. aim work to analyze spatio-temporal variability vertical structure Sea, well that form within their boundaries. uses data from oceanic reanalysis GLORYS12V1, Atlas Mesoscale Eddies "Mesoscale Eddy Trajectory product META 3.2 DT" for period 1993--2021. We average depth thickness FZs, distribution thermohaline areas. examines seasonal interannual volumes eddies, spatial distribution, trajectories, main parameters. In some areas, deepening has been established, can reach 900 m. presence layer 250--750 m found, while be traced vertically up 1000 compared FZs. may exceed one. greatest autumn period, smallest -- winter--spring. It noticeable summer weaken. leave boundaries move away origin hundreds kilometers. number lifetime cyclones similar estimates anticyclones, anticyclones travel long distances cyclones.