The measurement of power spectra of growth ring demonstrates the variations of period every 2.5, 3.2, 6.3 year under the influence of climatic factor.

The diurnal ruminating difference between different seasons was the result of the effect, which was caused by the climatic factor, grass condition, and the grazing system.

This article from Hunan unique aspect and so on geographical environment and climatic factor, spirit cultural element, economy and circulation discusses the Hunan cuisine hot formation.