Climate change in India: Impacts and scale-specific solutions

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Presentation transcript:

Climate change in India: Impacts and scale-specific solutions Somnath Baidya Roy Associate Professor Centre for Atmospheric Sciences Indian Institute of Technology Delhi

Summer temperature

South Asian Monsoons Pav: Relative change; Psd: Std Dev; SDII: Intensity; R5d: 5-day rain; CDD: Cons dry days; ONS: Onset; RET: Return; DUR: Duration

Tropical cyclones

Himalayan glaciers

Food security

Adaptation strategies Human ingenuity + decision support system e.g., data + expert knowledge Intervention at appropriate scales: individual to institution Sustainable development with resiliency Examples: Agriculture in Himachal Pradesh Grid-connected renewable energy

Agriculture 1995 2005 Kullu valley: Orchard area 20% Orchard income 10% Lahaul & Spitti: Orchard area 120% Orchard income 27% (Rana et al. 2009) Coupled high-res weather-crop models can help making these decisions

Renewable energy Wind and solar energy is intermittent but sometimes, they can offset each other

Renewable energy Example scenario: Demand Supply Example scenario: Urban rooftop solar + turbines on farmlands can meet the demand in 4 power grids with minimal land use disruption. Land requirement (%) North East NE South West Farmland 86 8 9 3 Urban 14 2 16

Summary Climate change is the new reality: warmer temperature, increase in rainfall variability Adaptation and mitigation require scale- specific strategies that increase resilience through combination of technologies Science can inform and support human decision-making

Thank you

Additional Slides

Global climate change

Winter temperature

Summer precipitation

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