UCIPUCIP

What if we cooled a ward?

Move the sliders to see an illustrative first-order estimate of daytime cooling from adding tree canopy or raising roof albedo, using coefficients from published research rather than a trained model. Every number below traces to a cited paper.

40% cover

Ziter et al. 2019 found negligible daytime cooling below ~40% canopy in a 60-90m radius; cooling only shows up above that threshold.

+0.10 albedo

Santamouris 2014's city-scale review range; Li, Bou-Zeid & Oppenheimer 2014 supports treating the relationship as roughly linear.

10% of ward area

Bowler et al. 2010's meta-analysis found parks average ~0.94°C cooler than their surroundings in the day; scaled here by the share of ward area converted.

Estimated daytime cooling

From tree canopy
0.00°C
From cool roofs
0.60°C
From pocket parks
0.09°C

Combined estimate: 0.69°C (cool-roof range: 0.57-2.30°C)

This is a cited coefficient estimator, not a trained model and not a validated climate simulation. The coefficients above are transferred from other cities' studies, not Mumbai-calibrated, and the three interventions are summed as independent illustrative terms, not a coupled physical model.

Sources for this estimate

  • Ziter et al. 2019

    PNAS 116(15):7575-7580

    Canopy percent to LST reduction coefficients (simulator and NBS impact)

    DOI

  • Li, Bou-Zeid & Oppenheimer 2014

    Environ. Res. Lett. 9(5):055002

    Cool-roof fraction to UHI reduction, structural support for a linear term

    DOI

  • Santamouris 2014

    Solar Energy 103:682-703

    Albedo to peak-temperature coefficient (~0.6-2.3K per +0.1 albedo)

    DOI

  • Bowler et al. 2010

    Landscape and Urban Planning 97:147-155

    Park cool-island effect (~0.94C average daytime, meta-analysis) for the pocket-park simulator term

    DOI