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

2. Summer temperature

3. 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

4. Tropical cyclones

5. Himalayan glaciers

6. Food security

7. 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

8. 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

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

10. 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

11. 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

12. Thank you

13. Additional Slides

14. Global climate change

15. Winter temperature

16. Summer precipitation