Sound travels faster on hot and humid days. In fact, an empirical formula exists. Its derivation can be found in http://en.wikipedia.org/wiki/Speed_of_sound . However, the second order approximation by Taylor series expansion gives the speed as 331 meters per second of time plus 3/5 of the temperature in degrees Celsius-meters per degree Celsius per second of time: s=331+3T/5. It indicates that at absolute zero of temperature (-273°C) the speed of cold sound is 164 meters per second of time. This value is physically meaningless since according to the third law of thermodynamics, absolute zero is not attainable by any thermal system in the physical universe. On the other hand, the rotational speed of the Earth allows particles of air in the atmosphere to move slower at both the North Pole and South Pole relative to particles of air at lower absolute values of latitude or at the equator. It is logical to say that the fastest air movement is at the equator where the hottest climate is found.

Coincidentally, the geomagnetic flux density is higher at both poles relative to the magnetic flux density at the equator. Since the intensity of a magnetic field is inversely proportional to the changes in temperature, decreasing temperatures give increasing flux densities and also provide the reason why prolonged coldest places on Earth can only be found at the poles where the speed of cold sound is also at its relative minimum. These suggest that ice ages of geological history are correlated to geomagnetic field reversals corresponding to periods of increasing geomagnetic flux density. In the same sense, periods of global warming correspond to uniformly decreasing global geomagnetic flux density in relation to increasing speeds of air particles justifying extreme weather conditions and thus increase the global average speed of cold sound. Theoretically, these conditions could possibly help increase the rotational speed of the Earth contrary to the scientific belief that it is slowing down.