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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Analysis of the global temperature growth
 Střeštík, Jaroslav
Global air temperature increased during the last 150 years approximately by 0.8°C. This increase can be approximated by a polynomial of third order. Nearly the same is valid for the CO2 and other greenhouse gases concentration in the atmosphere. The increase of global temperature is supplemented by considerable fluctuations, where periods with a quicker increase and periods with a slow increase or stagnation can be found. Subtracting the long-term trend from the observed temperature course the sinusoidal variation appears more apparent. Spectral analysis discovers a dominant sine wave with the period of 62 years with maxima in 1878, 1940, and 2002, supplemented by a subsidiary wave with the period of 20.7 years. Combination of these waves with above mentioned polynomial a curve is obtained, which sufficiently well fits into the observed course of global temperature during the whole period 1850-2008.
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