Estimation of long-term changes in thermal conditions and distribution of Atlantic and Subarctic water in the XXI Century in the Norwegian Sea on area surveys data

Purpose of the work: assessing spatial and temporal variability thermal conditions in waters various origins Norwegian Sea first decades 21 st century. Materials: oceanographic data collected during International Ecosystem Surveys 2000–2021. Methods used: comparative analysis, descriptive statistics methods, correlation analysis. Results: “boxes”, temperature which most fully describes change Atlantic Subarctic Sea, were identified. This is confirmed by high coefficients “boxes” with water over a wide area distribution origins. The interannual was studied separation warm cold periods. An assessment boundaries subarctic made position isotherms at different horizons. A statistically significant relationship shown between changes according to masses frontal zone them. Practical significance: results analysis situ from annual areal surveys make it possible estimate state absence standard sections can be used predict pelagic fish sea depending on conditions.