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

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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
DOI 10.1007/s00484-008-0162-7
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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.

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Citations

Cites

Research works printed but not linked: 10

  1. ASHRAE (2001) ASHRAE Fundamentals Handbook 2001 (SI Edition) American Society of Heating, Refrigerating, and Air-Conditioning Engineers, ISBN: 1883413885
  2. Bruse M (1999) Die Auswirkungen kleinskaliger Umweltgestaltung auf das Mikroklima-Entwicklung des prognostischen numerischen Modells ENVI-met zur Simulation der Wind-, Tempertaur-, und Feuchteverteilung in städtischen Struckturen. PhD Thesis, University Bochum, Germany
  3. Fanger PO (1972) Thermal comfort, analysis and application in environment engineering. McGraw Hill, New York
  4. Höppe P (1992) A new procedure to determine the mean radiant temperature outdoors. Wetter Leben 44:147–151
  5. Lindberg F (2005) Towards the use of local governmental 3-D data within urban climatology studies. Mapping Image Sci 2:32–37
  6. Matzarakis A (2000) Estimation and calculation of the mean radiant temperature within urban structures. Manual to RayMan, University of Freiburg, Germany
  7. Pickup J, de Dear R (1999) An outdoor thermal index (OUTSET*)-part1. The model and its assumptions. Proceedings of the 15th International congress biometeorology and international conference on urban climatology, Sydney, Australia, 1999, p279–283
  8. Ratti CF (2001) Urban analysis for environmental prediction. Darwin College, University of Cambridge
  9. Thorsson S, Lindberg F, Eliasson I, Holmer B (2006) Measurements of mean radiant temperature in different urban structures. In: Lindqvist, S, Grimmond, CBS, (eds.), 6th International Conference on Urban Climate, 867–870. Urban Climate Group, Department of Geosciences, Göteborg University, Sweden
  10. Vernon HM (1932) The measurement of radiant temperature in relation to human comfort. J Ind Hyg 14:95–111

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Metadata

Authors
Lindberg, F., Holmer, B., & Thorsson, S.
Affiliations
University of Gothenburg (SE)
Corresponding author
Lindberg, Fredrik
ORCID
Venue
International Journal of Biometeorology
Publisher
Springer Science and Business Media LLC
Published
2008-06-04
Volume
52
Issue
7
Pages
697-713
ISSN
  • 0020-7128 (ISSN-L)
  • 1432-1254
DOI
10.1007/s00484-008-0162-7
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
Licence
www.springer.com/tdm (tdm)
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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