Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Hobbyists & Makers · Geostrophic Wind

Geostrophic Wind for an El Niño year

Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate an El Niño year live below — adjust the inputs and watch it respond, right in your browser.

Geostrophic WindLive

wind parallel to isobars

Controls

Presets

Pressure gradient (mbar/100km)

Latitude (°)

Away from the ground, wind does not blow from high to low pressure — it blows along the isobars. The pressure-gradient force pushing air toward low pressure is balanced by the Coriolis force, and the result, the geostrophic wind, runs parallel to the pressure lines. Tighter isobar spacing means stronger wind. This is why you can read wind straight off a weather map.

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Data Inspector

Geostrophic wind24.2 m/s

In km/h87 km/h

Coriolis f1.03×10⁻⁴

Governing equation

v_{g} = \frac{1}{ρ f} \frac{\partial p}{\partial n} = 24.2 m/s, f = 2Ω sin (45°) = 1.03 \times 1 0^{- 4} s^{- 1}

Reading this result: The wind blows along the isobars, not across them: the pressure-gradient force toward low pressure is exactly cancelled by the Coriolis force, leaving a steady flow parallel to the lines.

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Frequently asked questions

Is this good for hobbyists & makers?: Yes — this version of "Geostrophic Wind for an El Niño year" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.