Cited by 574Urban Heat Island MitigationBuilding Energy and Comfort OptimizationWind and Air Flow Studies

SOLWEIG 1.0 – Modelling spatial variations of 3D radiant fluxes and mean radiant temperature in complex urban settings

Lindberg, Fredrik, Holmer, Björn, Thorsson, Sofia·2008·International Journal of Biometeorology

Abstract

The mean radiant temperature, T(mrt), which sums up all shortwave and longwave radiation fluxes (both direct and reflected) to which the human body is exposed is one of the key meteorological parameters governing human energy balance and the thermal comfort of man. In this paper, a new radiation model (SOLWEIG 1.0), which simulates spatial variations of 3D radiation fluxes and T(mrt) in complex urban settings, is presented. The T(mrt) is derived by modelling shortwave and longwave radiation fluxes in six directions (upward, downward and from the four cardinal points) and angular factors. The model requires a limited number of inputs, such as direct, diffuse and global shortwave radiation, air temperature, relative humidity, urban geometry and geographical information (latitude, longitude and elevation). The model was evaluated using 7 days of integral radiation measurements at two sites with different building geometries--a large square and a small courtyard in Göteborg, Sweden (57 degrees N)--across different seasons and in various weather conditions. The evaluation reveals good agreement between modelled and measured values of T(mrt), with an overall good correspondence of R (2) = 0.94, (p < 0.01, RMSE = 4.8 K). SOLWEIG 1.0 is still under development. Future work will incorporate a vegetation scheme, as well as an improvement of the estimation of fluxes from the four cardinal points.

Integrity signals

Registry

Crossref · 10.1007/s00484-008-0162-7

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30 of 30 references verified0 citation errors · 0 not checkable

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  • Not only Tmrt but also Tg, Tnw can be indirectly estimated using various models based on weather station data, geographical locations, time of day, day of year, etc.

    “However, not only Tmrt but also Tg, Tnw can be indirectly estimated using various models based weather station data, geographical locations, time of the day, day of the year, etc. (Matzarakis et al. 2007; Lindberg et al. 2008; Schreier et al. 2013; Błażejczyk et al. 2014; Kruger et al. 2014).”

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Authors
Lindberg, F., Holmer, B., & Thorsson, S.
Affiliations
University of Gothenburg (SE)
Corresponding author
Lindberg, Fredrik
Venue
International Journal of Biometeorology
Published
2008-06-04
Volume
52
Issue
7
Pages
697-713
ISSN
  • 0020-7128 (ISSN-L)
  • 1432-1254
OpenAlex
W2029291334
Cited by
574
References
30
Citations by year
2026: 88 · 2025: 68 · 2024: 45 · 2023: 46 · 2022: 42 · 2021: 37 · 2020: 50 · 2019: 37 · 2018: 36 · 2017: 27 · 2016: 23 · 2015: 22 · 2014: 18 · 2013: 13 · 2012: 5
FWCI
5.83
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Biometeorology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Svenska Forskningsrådet Formas
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › Urban Heat Island Mitigation
  • Physical Sciences › Engineering › Building and Construction › Building Energy and Comfort Optimization
  • Physical Sciences › Environmental Science › Environmental Engineering › Wind and Air Flow Studies
Keywords
mean radiant temperature, SOLWEIG, shortwave radiation, longwave radiation, urban microclimate, thermal comfort, human energy balance, radiation model, urban geometry, building geometry, courtyards
MeSH terms
Algorithms, Cities, Data Interpretation, Statistical, Environmental Monitoring, Hot Temperature, Radiation Dosage, Radiometry, Scattering, Radiation, Software, Temperature, Thermography, Models, Statistical, Ecosystem

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