Scientific Tool

European Marine Heatwave & Ecosystem Stress Atlas

Regional Sea Surface Temperature Anomaly Map

Click any European marine basin to examine localized thermal forcing & species vulnerability

Active Basin: Western Mediterranean | SST Anom: +3.8°C
Celtic Sea North Sea Baltic Sea Bay of Biscay W. Med E. Mediterranean Black Sea
Thermal Anomaly:
+0.5°C → +5.5°C

Hobday MHW Severity Engine

Calculates MHW category multipliers, Cumulative Intensity, and Degree Heating Weeks

Category IV: Extreme MHW
Exceeds 4x the 90th percentile climatological threshold difference
4.2x
Threshold Delta
Peak SST Anomaly +3.8°C Above 1982-2011 Baseline
Thermal Inertia (DHW) 11.4 °C-wks Degree Heating Weeks
Cumulative Intensity 79.8 °C-days ∑(SST - Baseline) over duration
Estimated Return Period 1 in 140 yr Pre-industrial vs Present day
+3.8°C
21 Days
84% Attributable

Marine Ecosystem & Trophic Stress Matrix

Empirical biological impact curves calibrated for the selected marine province

Historical Benchmarks vs Climate Projections

SST anomaly trajectory (°C) during verified record seasons vs IPCC SSP warming scenarios

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