KIRAKU
From the global atmospheric circulation to typhoons, the jet stream and ENSO — KIRAKU lets you see and play with the physics of weather and climate on iOS and Android.
Built-in Simulators
Three-cell Model
Hadley, Ferrel and Polar cells with the trade winds, westerlies and polar easterlies bent by Coriolis.
Vertical Structure
Temperature and pressure across the troposphere, stratosphere, mesosphere and thermosphere, with the ozone layer inversion.
Adiabatic Expansion
Rising moist air cools to the dew point and condenses. The contrast between dry and moist adiabatic lapse rates governs cloud growth.
Cyclones & Air Masses
Warm fronts, cold fronts and the occlusion that ends them. Updrafts along boundaries drive most precipitation.
Tropical Cyclone
Born over seas above 26.5°C, fueled by latent heat. Watch the eye, the eyewall and the counterclockwise spiral.
Warm & Cold Rain
Collision-coalescence and the Bergeron process. Whether snow, rain, sleet or hail falls depends on temperature and updraft.
Echoes & Imagery
Reflectivity, Doppler wind, plus visible and infrared cloud imagery — learn to read the colors.
Westerlies & Rossby Waves
A strong upper-tropospheric current. Meanders drive weather; blocking patterns spawn extremes.
ENSO Cycle
The Pacific climate seesaw — the warm pool slides east or piles up west, reshaping global weather.