Bowen ratio (Heat Overlay)

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The Bowen ratio is a property of a surface, specifically the ratio between two types of heat transfer (sensible heat and latent heat). The wetter the surface, the lower the ratio.[1]

Notes

  • DPRA Heat stress report uses only two possible values for the Bowen ratio: 0.4 and 3.0.
  • Terrains such as grassland and functions such as trees and vegetation generally have a ratio of 0.4.
  • Water is special in the sense that during the day the ratio is 0.4 and at night the ratio is 3.0.
  • The other functions and terrains have a Bowen ratio of 3.0

See also

References

  1. ↑ Wikipedia. Bowen Ratio. https://en.wikipedia.org/wiki/Bowen_ratio. Last visited: 16-12-2019
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Model attributes
Daily average radiation • Daily average wind speed • Daily maximum temperature • Daily minimum temperature • Dates • Exclude buildings • Exclude water • Exclude foliage height m • Foliage areas • Hourly humidity • Hourly radiation • Hourly temperature • Max shadow distance • Sun altitude • Sun azimuth • Sun daily motion • Wind direction • Wind speed
Building attributes
Bowen ratio • Foliage height • Foliage crown factor • Vegetation fraction
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Building elevation • Foliage height • Terrain elevation
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Calculation models and formulas • Feature attributes • Model attributes • Result types



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