Bowen ratio (Heat Overlay): Difference between revisions
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==Notes== | ==Notes== | ||
* {{ | * {{Heat DPRA Report}} uses only two possible values for the Bowen ratio: 0.4 and 3.0. | ||
* Terrains such as grassland and [[Function|functions]] such as trees and vegetation generally have a ratio of 0.4. | * Terrains such as grassland and [[Function|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. | * Water is special in the sense that during the day the ratio is 0.4 and at night the ratio is 3.0. | ||
Revision as of 10:36, 16 December 2019
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
- ↑ Wikipedia. Bowen Ratio. https://en.wikipedia.org/wiki/Bowen_ratio. Last visited: 16-12-2019
- Group
- 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 • Wind decline angle
- Building attributes
- Building elevation • Foliage height • Terrain elevation
- Related