Water Deficit May Cause Vegetation Browning in Central Asia

There is consistent evidence of vegetation greening in Central Asia over the past four decades. However, early 1990s, temporarily stagnated and even for a time reversed. In this study, we evaluate changes normalized difference index (NDVI) based on long-term satellite-derived remote sensing data systems Global Inventory Modelling Mapping Studies (GIMMS) NDVI from 1981 to 2013 MODIS 2000 2020 determine whether has browned. Our findings indicate that seasonal sequence summer > spring autumn winter, spatial distribution pattern semicircular distribution, with Aral Sea Basin as its core an upward tendency inside outside. Around mid-1990s, region’s experienced two climatic environments opposing trends (cold wet; dry hot). Prior 1994, increased substantially throughout growth phase (April–October), but trend reversed after when began brown. suggest are linked climate change induced by CO2. The state water deficit caused temperature major cause browning turning point across study area. At same time, were drought degree (PDSI). This research relevant monitoring carbon neutralization Asian ecosystems.