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Progress in Earth and Planetary Science

Table 1 Criteria for demarcating the arid/humid climate regions of Asia according to AI

From: Arid/humid patterns over Asia in response to national-committed emission reductions under the Paris agreement

Arid/humid climate region

Aridity index (AI = P/PET)

Humid

AI ≥ 0.65

Sub-humid

0.5 ≤ AI < 0.65

Semi-arid

0.2 ≤ AI < 0.5

Arid

AI < 0.2

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