adiabatic process advection aerodynamic heating atmospheric pressure baroclinity bifurcation theory black hole brownian motion churchill-bernstein equation cloud cloud condensation nuclei condensation convection cell convection oven convective heat transfer convective instability diffusion equator fluid fluid dynamics fog fourier transform gas geographical pole grashof number gravitational convection heat heat conduction heat index heat pipe heat transfer humidex humidity lapse rate lightning liquid mantle convection mass transfer ocean pattern formation planet plate tectonics pressure radioactive decay rayleigh number rheid salinity solar radiation spiral surface weather analysis symmetry temperature thermal radiation thermohaline circulation thermomagnetic convection viscosity visibility vortex dynamics vorticity water vapor wet-bulb temperature wind wind chill