Large-Scale Analysis of the Spatiotemporal Changes of Net Ecosystem Production in Hindu Kush Himalayan Region

The Hindu Kush Himalayan (HKH) region is one of the most ecologically vulnerable regions in world. Several studies have been conducted on dynamic changes grassland HKH region, but few considered net ecosystem productivity (NEP). In this study, we quantitatively analyzed temporal and spatial NEP magnitude influence climate factors from 2001 to 2018. was obtained by calculating difference between primary production (NPP) estimated Carnegie–Ames Stanford Approach (CASA) model heterotrophic respiration (Rh) geostatistical model. results showed that exhibited weak carbon uptake with values 42.03 gC?m?2?yr?1, total sequestration 0.077 Pg C. distribution gradually increased west east, Qinghai–Tibet Plateau, it northwest southeast. sources sinks differed at different altitudes. a sink 3000–5000 m, while grasslands below 3000 m above 5000 were sources. Grassland strongest correlation precipitation, had lagging effect precipitation. precipitation previous year stronger than current year. negatively correlated temperature not solar radiation. study dynamics can provide theoretical basis help herders balance grazing forage.