Aridity thresholds Reveal transitions in dominant drivers of partitioned Water–Carbon coupling across Central Asian drylands

Shiran Song, Xi Xi Chen, Akhylbek Kazhigulovich Kurishbayev, Philippe De Maeyer, Chuan Wang, Chanjuan Zan, Shukhrat Shokirov, Tie Liu

International Journal of Applied Earth Observation and Geoinformation, 2026

Full text Open access: Gold Metadata (CSL-JSON)

DOI 10.1016/j.jag.2026.105344

Data confidence 70 medium

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Abstract

• Aridity thresholds mark nonlinear shifts in dryland carbon–water coupling. • WUE and WUEc rebound under high aridity, indicating stress-tightened coupling. • Dominant controls shift from vegetation traits to hydroclimatic stressors. • Post-threshold, temperature is positive but VPD negative for WUE and WUEc.