Table 4 Classification of carbon index change trend.

From: Carbon neutral spatial zoning and optimization based on land use carbon emission in the qinba mountain region, China

Sen-estimated value

Z-value

Trend type

0 > Sen-estimated value

−1.66 > Z-value

Marked decrease

0 > Sen-estimated value

0 > Z-value ≥ − 1.66

Moderated decrease

Sen-estimated value = 0

Z-value = 0

Unchanged

Sen-estimated value > 0

1.66 ≥ Z-value > 0

Moderated increase

Sen-estimated value > 0

Z-value > 1.66

Marked increase

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