Note4Students
From UPSC perspective, the following things are important :
Mains level: Impact of climate change;
Why in the News?
The World Meteorological Organization (WMO)‘s October 2024 report revealed that 2023 was the driest year for global rivers in 33 years, intensifying stress on water supplies globally.
What factors contributed to 2023 being the driest year for global rivers?
- Record High Temperatures: 2023 was marked as the hottest year on record, which significantly contributed to prolonged drought conditions and reduced river flows across many regions globally.
- Climate Change Impact: Rising temperatures have led to a more erratic hydrological cycle, resulting in both extreme droughts and flooding. This unpredictability has exacerbated water shortages in many areas.
- Transition from La Niña to El Niño: The climatic shift from La Niña to El Niño conditions in mid-2023 played a crucial role in altering weather patterns, leading to widespread dry conditions in many regions while simultaneously causing flooding in others.
- Glacier Melting: The report indicated that glaciers experienced their largest mass loss in 50 years, which threatens long-term water security for millions who rely on glacial meltwater for their water supply.
How has climate change impacted global water resources and glacier conditions?
- Increased Water Scarcity: The report highlighted that approximately 3.6 billion people currently lack reliable access to water for at least one month each year, a number expected to rise to over 5 billion by 2050 due to worsening water scarcity.
- Glacier Dependency: Many regions depend on glacial meltwater for their river systems. As glaciers continue to shrink, future water availability is jeopardized, particularly in areas like Europe and North America.
- Erratic Water Supply: The hydrological cycle’s acceleration leads to unpredictable rainfall patterns, causing both droughts and floods that disrupt agricultural and industrial water supplies.
What are the implications for global water access and management?
- Increased Demand vs. Supply Shortages: With growing populations and rising demand for water resources, the current trends indicate a critical imbalance between supply and demand, leading to heightened competition for available water resources.
- Need for Improved Monitoring: The WMO emphasizes the necessity for better data collection and sharing regarding water resources. This is crucial for effective management strategies that can adapt to changing conditions.
- Urgent Action Required: There is an urgent need for global cooperation and action to address these challenges. Enhanced monitoring systems and international collaboration are essential to mitigate the impacts of climate change on water resources.
Way forward:
- Strengthen Water Resource Management and Adaptation Strategies: Governments should implement integrated water resource management (IWRM) plans to address both water scarcity and flooding risks.
- Enhance Global Cooperation and Data-Driven Decision Making: Countries must prioritize data-sharing, improve monitoring of water resources, and foster cross-border collaborations to manage shared water systems effectively.
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