295
Table 16.3 Aridity index in two time periods (1961–1990 and 1991–2017), difference or change
between periods, and trend (based on the slope of a simple linear regression)
Country
Average of
Index6190
Average of
Index9117
Average of
Difference
Average of Trend
1961–2017
Argentina
0.900
0.874
−0.026
0.034
Arid
0.161
0.194
0.034
0.001
Dry-subhumid
0.570
0.607
0.037
0.001
NA
1.440
1.354
−0.086
0.071
Semi-arid
0.360
0.387
0.026
0.001
Belize
1.422
1.373
−0.048
−0.001
NA
1.422
1.373
−0.048
−0.001
Bolivia
0.927
0.871
−0.056
0.004
Dry-subhumid
0.589
0.521
−0.068
−0.002
NA
1.039
0.982
−0.058
0.005
Semi-arid
0.418
0.386
−0.032
0.000
Brazil
1.245
1.208
−0.037
−0.001
Dry-subhumid
0.573
0.520
−0.053
−0.002
NA
1.319
1.283
−0.036
−0.001
Semi-arid
0.411
0.375
−0.036
−0.001
Chile
52.949
52.877
−0.072
0.092
Arid
0.117
0.132
0.015
0.000
Dry-subhumid
0.576
0.544
−0.032
−0.001
Hyper-arid
0.025
0.024
−0.001
0.000
Arid
0.048
0.063
0.015
0.000
Hyper-arid
0.022
0.018
−0.003
0.000
NA
78.034
77.927
−0.107
0.136
Semi-arid
0.327
0.335
0.009
0.000
Colombia
1.760
1.702
−0.058
−0.002
Dry-subhumid
0.608
0.525
−0.083
−0.003
NA
1.788
1.729
−0.058
−0.002
Semi-arid
0.418
0.363
−0.055
−0.002
Costa Rica
2.748
2.476
−0.271
−0.008
NA
2.748
2.476
−0.271
−0.008
Cuba
0.885
0.844
−0.040
−0.001
Dry-subhumid
0.585
0.565
−0.020
−0.001
NA
0.901
0.859
−0.041
−0.001
Dominican Republic 0.974
0.895
−0.079
−0.001
Dry-subhumid
0.540
0.580
0.040
0.001
NA
1.003
0.916
−0.087
−0.001
Ecuador
1.525
1.496
−0.028
−0.002
Arid
0.170
0.190
0.020
0.001
Dry-subhumid
0.564
0.574
0.010
0.000
NA
1.735
1.698
−0.037
−0.002
Semi-arid
0.398
0.419
0.021
0.001
(continued)
16 Drylands, Aridification, and Land Governance in Latin America: A Regional…