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: 1960–2010Series 3: 1981–2010TendencySurface area with changesPercentage area of the watershed
km2%

1Low oscillationIsothermal846.510.70.63
2Low oscillationExtreme oscillation624.27.90.47
3Extreme oscillationLow oscillation6,421.181.24.80
4IsothermalLow oscillation11.60.10.01
Total7,903.41005.91