METEOROLOGY – HUMIDITY & WATER VAPOUR CALCULATOR
Vapour Pressure Actual
A precise tool.
What is the Vapour Pressure Actual & How does it work?
The actual vapor pressure is a measure of the partial pressure exerted by water vapor in the air. It is an important parameter in meteorology and climatology, as it directly influences temperature, humidity, and other weather conditions.
e = 6.112 times e^{left(frac{17.67 times T}{T + 243.5}right)}
e = actual vapor pressure in hPa
T = dew point temperature in °C
T = dew point temperature in °C
This formula, known as the Clausius–Clapeyron equation, allows us to calculate the actual vapor pressure from the dew point temperature. Understanding this relationship is crucial for accurate weather forecasting and analysis.
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Result
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Frequently Asked Questions
What is actual vapor pressure?
Actual vapor pressure is the partial pressure exerted by water vapor in the air, crucial for understanding weather conditions.
How do I calculate actual vapor pressure?
Use the formula e = 6.112 × e^(17.67 × T / (T + 243.5)), where e is the actual vapor pressure in hPa and T is the dew point temperature in °C.
Why is actual vapor pressure important?
It directly influences temperature, humidity, and other weather conditions, making it vital for meteorology and climatology.
What does the Clausius–Clapeyron equation represent?
This equation relates the dew point temperature to the actual vapor pressure, allowing for accurate calculations in atmospheric science.
Can this calculator be used for any temperature unit?
No, the formula specifically uses Celsius (°C) for the dew point temperature. Conversion may be necessary for other units.
What is the significance of 243.5 in the equation?
243.5 is a constant used in the Clausius–Clapeyron equation to represent the standard reference temperature, aiding in accurate vapor pressure calculations.
How does actual vapor pressure differ from relative humidity?
Actual vapor pressure measures the partial pressure of water vapor, while relative humidity expresses it as a percentage of the saturation vapor pressure at a given temperature.
Results are for informational purposes only and do not constitute professional advice.