Seasonal Changes in Climate Variables in Rainfed Crop Areas in the Lerma-Chapala-Santiago Basin, Mexico

Table 2

Seasonal behavior for changes in R, Tmax, and Tmin in the basin and possible consequences for rainfed maize crops (1960–1985 to 1986–2010).

Seasonal change in LCS basin with crops
Seasonal change		Affected area (km^2)	Area (%)	Detected difference	Possible consequences of detected changes
RCA	−αTmin	8890	6.6	1.12°C	Accelerated vegetative growth
RCA 2.	+αTmin	4482	3.3	0.54°C	Delayed vegetative growth
RCA 3.	−αR	3243	2.4	32.71 mm	Crop damage due to water deficit
RCA 4	−αTmax	2324	1.7	0.01°C	Slowed vegetative growth during final stages
RCA 5.	+φ Tmin, −αR	1972	1.5	20 days, 46 mm	Negative effect on plant development
RCA 6.	+αTmax	1620	1.2	1.46°C	Negative effect on initial growth stages
RCA 7.	+φ Tmin, −αTmin, −αR	1493	1.1	17 days, 2.31°C, 46 mm	Crop alteration during initial and final stages, including crop damage
RCA 8.	+φ Tmin, −φ Tmax, −αR	1444	1.1	32 days, 12 days, 69 mm	Crop alteration during initial and final stages, including crop damage
RCA 9.	−αTmin, −αR	1258	0.9	2.17°C, 41 mm	Crop damage due to water deficit
RCA 10.	−φ Tmax	969	0.7	8 days	Negative effect on initial growth stages
Other categories		5764	4.3	S/D
Crops with significant changes		33460	25.0	S/D
Crops without significant changes		18183	13.6	S/D
No crops		82395	61.5	S/D