Aridity thresholds Reveal transitions in dominant drivers of partitioned Water–Carbon coupling across Central Asian drylands
Shiran SongCollege of Geoinformatics, Zhejiang University of Technology, Hangzhou 310014, ChinaXi Xi ChenCollege of Geoinformatics, Zhejiang University of Technology, Hangzhou 310014, ChinaAkylbek KurishbayevKazakh National Agrarian Research University, Abay Avenue 8, Almaty 050010, KazakhstanPhilippe De MaeyerChuan WangUniversity of Chinese Academy of Sciences, Beijing 100049, ChinaChanjuan ZanSchool of Geographical Sciences, China West Normal University, Nanchong, Sichuan 637009, ChinaShukhrat ShokirovDepartment of Geodesy and Geoinformatics, Tashkent Institute of Irrigation and Agricultural Mechanization Engineers - National Research University, Tashkent, UzbekistanTie LiuCollege of Geoinformatics, Zhejiang University of Technology, Hangzhou 310014, China
ABI
Аннотация
• 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.
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