Identification of Variations in the Climatic Conditions of the Lerma-Chapala-Santiago Watershed by Comparative Analysis of Time Series

Table 4

Absolute, relative, and proportional areas of the Lerma-Chapala-Santiago watershed with changes in thermal oscillation between time series one (1960–2010) and time series three (1960–1989).

No.	Series 1: 1960–2010	Series 3: 1981–2010	Tendency	Surface area with changes		Percentage area of the watershed
				km^2	%
1	Low oscillation	Isothermal	↓	846.5	10.7	0.63
2	Low oscillation	Extreme oscillation	↑	624.2	7.9	0.47
3	Extreme oscillation	Low oscillation	↓	6,421.1	81.2	4.80
4	Isothermal	Low oscillation	↑	11.6	0.1	0.01
			Total	7,903.4	100	5.91