Monday 1:05 am

Twelve minutes on stage.Two years of research.

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Slides from a talk made from a paper. Each claim carries the number of its reference, and the last slide lists them all.

Shade is infrastructure · Navarro · 12 min

The edge of town · 01/08

A city is an island of heat.

Cities stay warmer than the land around them, and the gap is widest on calm, clear nights, as paved ground and walls give back the day’s heat.1

Fields

Suburbs

Downtown

Park

Suburbs

Fields

The cliff

The peak

The park dips

Air temperature, crossing a city on a calm, clear night. A schematic.

Shade is infrastructure · Navarro · 12 min

The plateau · 02/08

419

big cities seen from space. On average, the city’s surface is warmer than the countryside around it.2

+1.5 °C

the city’s surface by day, on average

+1.1 °C

by night

The more of a city’s ground is paved and built over, the stronger its island.3

Shade is infrastructure · Navarro · 12 min

The fields · 08/08

Sources

Every claim from the literature in this talk, in the order it was cited.

Oke, 1982

The energetic basis of the urban heat island.

Quarterly Journal of the Royal Meteorological Society 108: 1–24

Peng and others, 2012

Surface urban heat island across 419 global big cities.

Environmental Science & Technology 46: 696–703

Imhoff and others, 2010

Remote sensing of the urban heat island effect across biomes in the continental USA.

Remote Sensing of Environment 114: 504–513

Ziter and others, 2019

Scale-dependent interactions between tree canopy cover and impervious surfaces reduce daytime urban heat during summer.

PNAS 116: 7575–7580

Akbari, Pomerantz and Taha, 2001

Cool surfaces and shade trees to reduce energy use and improve air quality in urban areas.

Solar Energy 70: 295–310

Hoffman, Shandas and Pendleton, 2020

The effects of historical housing policies on resident exposure to intra-urban heat: a study of 108 US urban areas.

Climate 8: 12

Bowler and others, 2010

Urban greening to cool towns and cities: a systematic review of the empirical evidence.

Landscape and Urban Planning 97: 147–155

Back in the fields.

Thank you. Questions to i.navarro@harborcity.example

Figures marked as our own are from Navarro and colleagues’ sensor network.

The paper’s references

1Oke, T. R. (1982). The energetic basis of the urban heat island.
2Peng, S., Piao, S., Ciais, P. and others (2012). Surface urban heat island across 419 global big cities.
3Imhoff, M. L., Zhang, P., Wolfe, R. E. and Bounoua, L. (2010). Remote sensing of the urban heat island effect across biomes in the continental USA.
4Ziter, C. D., Pedersen, E. J., Kucharik, C. J. and Turner, M. G. (2019). Scale-dependent interactions between tree canopy cover and impervious surfaces reduce daytime urban heat during summer.
5Akbari, H., Pomerantz, M. and Taha, H. (2001). Cool surfaces and shade trees to reduce energy use and improve air quality in urban areas.
6Hoffman, J. S., Shandas, V. and Pendleton, N. (2020). The effects of historical housing policies on resident exposure to intra-urban heat: a study of 108 US urban areas.
7Bowler, D. E., Buyung-Ali, L., Knight, T. M. and Pullin, A. S. (2010). Urban greening to cool towns and cities: a systematic review of the empirical evidence.

Typed into Synclo

A 12-minute conference talk from my paper on urban heat islands, for planners and scientists. Keep every citation.

Charts from your data.Every chart is drawn from your numbers and names where they came from.
Checked against your paper.When you bring the paper, charts and figures are checked against its text.
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