Top-of-atmosphere radiative cooling with white roofs

Experimental verification and model-based evaluation

Francisco Salamanca Palou, Shaheen Tonse, Surabi Menon, Vishal Garg, Krishna P. Singh, Manish Naja, Marc L. Fischer

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We evaluate differences in clear-sky upwelling shortwave radiation reaching the top of the atmosphere in response to increasing the albedo of roof surfaces in an area of India with moderately high aerosol loading. Treated (painted white) and untreated (unpainted) roofs on two buildings in northeast India were analyzed on five cloudless days using radiometric imagery from the IKONOS satellite. Comparison of a radiative transfer model (RRTMG) and radiometric satellite observations shows good agreement (R2=0.927). Results show a mean increase of 50Wm2 outgoing at the top of the atmosphere for each 0.1 increase of the albedo at the time of the observations and a strong dependence on atmospheric transmissivity.

Original languageEnglish (US)
Article number044007
JournalEnvironmental Research Letters
Volume7
Issue number4
DOIs
StatePublished - Jan 1 2012
Externally publishedYes

Fingerprint

top of atmosphere
Atmosphere
Roofs
roof
albedo
India
Theoretical Models
Satellite Imagery
Satellites
Cooling
cooling
IKONOS
shortwave radiation
atmosphere
Radiative transfer
transmissivity
clear sky
Aerosols
radiative transfer
upwelling

Keywords

  • aerosol loading
  • cool roof
  • radiation balance
  • satellite radiometry
  • surface reflectance
  • urban systems
  • white roof

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Public Health, Environmental and Occupational Health

Cite this

Top-of-atmosphere radiative cooling with white roofs : Experimental verification and model-based evaluation. / Salamanca Palou, Francisco; Tonse, Shaheen; Menon, Surabi; Garg, Vishal; Singh, Krishna P.; Naja, Manish; Fischer, Marc L.

In: Environmental Research Letters, Vol. 7, No. 4, 044007, 01.01.2012.

Research output: Contribution to journalArticle

Salamanca Palou, Francisco ; Tonse, Shaheen ; Menon, Surabi ; Garg, Vishal ; Singh, Krishna P. ; Naja, Manish ; Fischer, Marc L. / Top-of-atmosphere radiative cooling with white roofs : Experimental verification and model-based evaluation. In: Environmental Research Letters. 2012 ; Vol. 7, No. 4.
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