Global & Regional Trends

• Global surface temperature increased faster since 1970 than in any other 50 year period over the last 2000 years (IPCC 2021)
• In the last two decades (2001-2020), the rise in global surface temperature was +0.99°C
• Within one decade (2011-2022)- current global surface temperature has risen to +1.09°C
• CO₂ concentrations have increased by 40 percent since pre-industrial era (IPCC 2022)
• Climate change: altering hydrological systems and affecting water resources in terms of quantity and quality
• Climate change trend studied in major river basins (Ganga, Brahmaputra, Krishna, Cauvery and Mahanadi) of India
• It was found that the total annual rainfall in the studied region decreased 257 to 580mm (mean 418.5mm); whereas, the average annual temperature increased 0.2 to 0.47°C (mean 24.5°C) in last three decades