Climate Change Impacts on Water Resources in Central Asia

Central Asia’s water resources are under mounting pressure from climate change characterised by accelerated warming, altered precipitation patterns and glacier retreat. Air temperatures in many catchments are rising faster than the global average, intensifying snow and ice melt in the Pamir, Tien Shan and Altai ranges. Increased evapotranspiration coupled with declining snowfall has shifted seasonal river flows, reducing summer runoff and exacerbating drought risk. Major endorheic systems such as the Aral and Caspian basins are shrinking, with profound consequences for biodiversity, agriculture and urban water supplies. Groundwater recharge is declining in arid plains, fuelling soil salinisation and desertification. These hydrological changes intensify transboundary tensions across the five “-stans” and threaten food–energy–water security. Sustainable adaptation demands integrated, basin-wide management, dynamic conservation planning and investment in resilient infrastructure to safeguard ecosystems and livelihoods in a region of global strategic importance.

Research from Nature Portfolio

Recent studies have projected drastic declines in the Caspian Sea level—up to twenty metres by 2100 under high-emission scenarios—driven by rising temperatures and reduced inflow. Geospatial analyses reveal that even modest drawdowns will disrupt marine habitats, collapse protected-area coverage and strand billions of dollars of coastal infrastructure. Researchers advocate a shift from static to dynamic conservation strategies that can track migrating species and ecosystems. Complementary field observations of the Aral Sea’s residual basins document diverging physical and biological regimes: hyperhaline stratified waters in the Western Large Aral contrast with relatively diverse, mixed conditions in the Small Aral. This heterogeneity underscores the need for tailored monitoring and restoration approaches to address local hydrodynamics and ecological responses to desiccation.

Climate Change Impacts on Water Resources in Central Asia publication trend

The graph below shows the total number of articles in climate change impacts on water resources in central asia across all publications each year (not limited to Nature Index journals).

Technical terms

Endorheic basin: A closed drainage system that retains water and allows no outflow to external bodies of water.

Evapotranspiration: The combined process by which water is transferred from land to the atmosphere through evaporation and plant transpiration.

Glacier mass balance: The net gain or loss of ice from a glacier system, reflecting accumulation minus ablation.

Transboundary water management: Collaborative governance of shared water resources across national or administrative borders.

Hydrographic border: A boundary defined by the natural watershed divide rather than political demarcation.

References

1. Rapid decline of Caspian Sea level threatens ecosystem integrity, biodiversity protection, and human infrastructure. Communications Earth & Environment (2025).
2. Present state of the Aral Sea: diverging physical and biological characteristics of the residual basins. Scientific Reports (2016).
3. Essentials of Endorheic Basins and Lakes: A Review in the Context of Current and Future Water Resource Management and Mitigation Activities in Central Asia. Water (2017).
4. Climate change, water resources and sustainable development in the arid and semi-arid lands of Central Asia in the past 30 years. Journal of Arid Land (2018).
5. Human and Natural Impacts on the Water Resources in the Syr Darya River Basin, Central Asia. Sustainability (2019).