Leaf VPD From RH
Compute the leaf vapour pressure deficit in kilopascals from leaf temperature using the Tetens equation for saturation vapour pressure, 0.6108 times e^(17.27 times temperature divided by temperature plus 237.3), scaled by one minus relative humidity over one hundred.
Description
Compute the leaf vapour pressure deficit in kilopascals from leaf temperature using the Tetens equation for saturation vapour pressure, 0.6108 times e^(17.27 times temperature divided by temperature plus 237.3), scaled by one minus relative humidity over one hundred.
Leaf VPD From RH is a focused biology tool that compute the leaf vapour pressure deficit in kilopascals from leaf temperature using the Tetens equation for saturation vapour pressure, 0.6108 times e^(17.27 times temperature divided by temperature plus 237.3), scaled by one minus relative humidity over one hundred. It calculates locally from the values you enter and exposes the result without changing the source observations.1
When to use Leaf VPD From RH
Use Leaf VPD From RH when you need to compute the leaf vapour pressure deficit in kilopascals from leaf temperature using the Tetens equation for saturation vapour pressure, 0.6108 times e^(17.27 times temperature divided by temperature plus 237.3), scaled by one minus relative humidity over one hundred. Enter Leaf temperature and Relative humidity using the definitions and units below so the result can be reproduced.
- Leaf temperature
- Leaf temperature in degrees Celsius between -10 and 60.
- Relative humidity
- Relative humidity as a percentage between 0 and 100; zero yields the full saturation vapour pressure.
How Leaf VPD From RH calculates the result
The published tool contract uses this rule: Compute the leaf vapour pressure deficit in kilopascals from leaf temperature using the Tetens equation for saturation vapour pressure, 0.6108 times e^(17.27 times temperature divided by temperature plus 237.3), scaled by one minus relative humidity over one hundred.1
- Leaf VPD
- Leaf vapour pressure deficit in kilopascals; positive or zero.
Limitations of Leaf VPD From RH
A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small. Leaf temperature must remain between -10 and 60; Relative humidity must remain between 0 and 100.
Alternative or Complementary measurements
Retain the original Leaf temperature and Relative humidity values and their units alongside the result. VPD Calculator is useful when you instead need to compute the leaf level vapour pressure deficit in kilopascals as saturation vapour pressure minus actual vapour pressure. LAI Calculator provides another view by helping you compute the leaf area index as total one-sided leaf area divided by the ground surface area it covers.
References
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Vapour-pressure deficit — Wikipedia contributors
Similar or alternative tools
- VPD Calculator
Compute the leaf level vapour pressure deficit in kilopascals as saturation vapour pressure minus actual vapour pressure.
- LAI Calculator
Compute the leaf area index as total one-sided leaf area divided by the ground surface area it covers.
- Specific Leaf Area
Compute specific leaf area SLA in square centimetres per gram as one-sided leaf area divided by leaf dry mass.