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Land-Sea Thermal Contrast & Monsoon Onset

Interactive seasonal energy-balance model: land and ocean heat at different rates because of their different effective heat capacities, and the growing land-sea temperature contrast flips the pressure gradient and triggers monsoon onset. Tune the forcing and watch the onset day shift.

Climate, Ecology & Environment3DModerate60 FPS📱 Mobile-adapted⇄ 2D version

Monsoon onset is, at its core, a heat-capacity story: land is a thin slab that heats and cools quickly under seasonal sunlight, while the ocean's mixed layer behaves like a deep reservoir that lags far behind. This simulator runs a real seasonal energy-balance model for both surfaces side by side, tracks the growing land-sea temperature contrast ΔT, and switches the near-surface wind field from a dry offshore breeze to a moisture-carrying onshore flow the moment ΔT crosses the onset threshold — with land, sea and airflow all rendered in 3D and live numeric readouts for land temperature, sea temperature, ΔT and day-of-year.

⚙ Under the hood

A seasonal energy-balance model showing why land heats and cools faster than the ocean, and how the resulting land-sea temperature contrast flips the pressure gradient to trigger monsoon onset.

monsoonclimateland-sea contrastenergy balanceseasonal cycleatmospheric circulation

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install