Oceanic warming of western Europe

Area of Science:

• Oceanography
• Fluid Dynamics
• Climate Science

Background:

• The northern North Atlantic experiences significant winter deep convection, exporting heat and buoyancy from the upper ocean.
• Horizontal advection compensates for this loss throughout the rest of the year, influencing ocean circulation patterns.

Purpose of the Study:

• To compute absolute geostrophic currents in the northern North Atlantic using the heat conservation equation.
• To investigate the resulting flow field and its consistency with oceanographic principles and wind-stress data.

Main Methods:

• Application of the heat conservation equation to compute absolute geostrophic currents.
• Analysis of the computed flow field against buoyancy and heat flux requirements.
• Comparison with independent physical data, including wind-stress curl and the Sverdrup relation.

Main Results:

• A distinct spiral pattern with depth emerged as a key feature of the computed ocean flow.
• The calculated geostrophic currents align with buoyancy and heat flux requirements.
• The flow field is consistent with locally vanishing wind-stress curl and Sverdrup relation implications.

Conclusions:

• The heat conservation equation successfully computes absolute geostrophic currents in this region.
• The identified spiral flow pattern plays a vital role in the ocean's annual heat and buoyancy budget.
• The findings support the interplay between deep convection, advection, and wind forcing in North Atlantic circulation.