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Table 8 Mann–Kendall and Sen’s slope results for monthly NDVI trends

From: Spatiotemporal climate and vegetation greenness changes and their nexus for Dhidhessa River Basin, Ethiopia

AEZ Parameters January February March April May June July August September October November December
Tepid sub-humid Z-test 2.076* 2.004* − 2.979* − 2.148* 1.462 4.134* 1.607 4.134* 3.665* 2.654* 1.751 − 2.762*
Sen’s slope (year−1) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
Cool sub-humid Z-test − 1.813 − 1.379 − 0.759 0.976 1.844 1.999 2.030* 2.216* − 0.449 − 0.108 − 1.131 − 2.773*
Sen’s slope (year−1) − 0.001 − 0.001 − 0.001 0.001 0.001 0.001 0.001 0.002 0.000 0.000 − 0.001 − 0.002
Warm sub-humid Z-test 1.472 2.278* 2.185* 2.866* 1.658 1.875 2.464* 2.588* 1.472 1.348 1.255 1.193
Sen’s slope (year−1) 0.001 0.001 0.001 0.001 0.001 0.001 0.002 0.002 0.001 0.001 0.001 0.001
Tepid humid Z-test − 1.255 − 0.759 − 1.069 0.697 0.108 0.046 0.728 0.604 1.813 1.674 1.255 0.077
Sen’s slope (year−1) − 0.001 0.000 − 0.001 0.000 0.000 0.000 0.001 0.001 0.002 0.001 0.001 0.000
Tepid moist Z-test 2.061* − 0.077 − 1.720 0.976 − 0.108 1.054 1.844 2.959* 1.317 1.844 2.495* 1.767
Sen’s slope (year−1) 0.002 0.000 − 0.001 0.001 0.000 0.001 0.002 0.002 0.001 0.001 0.002 0.001
Warm humid Z-test − 1.100 0.356 − 1.364 1.224 0.480 − 0.170 1.472 0.728 1.906 0.914 1.162 1.162
Sen’s slope (year−1) − 0.001 0.000 − 0.001 0.001 0.000 0.000 0.001 0.001 0.002 0.001 0.001 0.001
Warm moist Z-test 2.464* 2.773* 2.835* 4.199* 2.928* 2.897* 2.897* 2.464* 1.751 1.844 2.495* 2.897*
Sen’s slope (year−1) 0.001 0.001 0.001 0.002 0.001 0.001 0.002 0.002 0.002 0.002 0.002 0.002
  1. * Statistically significant at 0.05% level