Responses to the Impact of Drought on Carbon and Water Use Efficiency in Inner Mongolia

The dynamics of plants’ carbon and water use efficiency their responses to drought are crucial the sustainable development arid semi-arid environments. This study used trend analysis partial correlation examine (CUE) (WUE) Inner Mongolia’s vegetation from 2001 2020. MODIS data for gross primary productivity (GPP), net (NPP), potential evapotranspiration (PET), (ET), severity index (DSI), plant type were used. Altered trends observed during 2001–2020 in area. results revealed that 98.17% research area’s was dry wet 1.83% dry, regions with decreased broadly dispersed. In 2001–2020, CUE Mongolia declined by 0.1%·year?1, whereas WUE reduced 0.008 g C·mm?1·m?2·year?1, but total change not significant. west east, increased southwest northeast. DSI had highest negative connection, accounting 97.96% watershed area, 71.6% passed significance test. coefficients spatially opposite those DSI. total, 54.21% cover exhibited a connection different types negatively correlated except grasslands (GRA). Drought mostly influenced types, which higher than WUE. study’s findings can inform climate on cycles.