2.4.6—Ocean heat distribution
- Syllabus
- First assessment 2026
- Objective
- 2.4.6
- Level
- HL
Ocean currents redistribute stored solar heat, so a coast’s climate can differ from what latitude alone predicts.
Wind and Earth’s rotation move surface water; warm currents generally moderate nearby coasts, while cold currents cool air and may reduce evaporation and rainfall.
A warm current beside a high-latitude coast can keep winters milder than an inland site at the same latitude.
Check current direction and sea-surface temperature; currents transport heat and moisture.
Ocean currents do not create energy; they redistribute heat already absorbed by the climate system.