Atmospheric Vapor Pressure Calculator

Vapor Pressure Formula:

\[ e_s = 6.112 \times \exp\left(\frac{17.67 \times T}{T + 243.5}\right) \]

Vapor Pressure (hPa):

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1. What is an Atmospheric Vapor Pressure Calculator?

Definition: This calculator estimates the saturation vapor pressure of water in the atmosphere based on temperature using the August-Roche-Magnus formula.

Purpose: It helps meteorologists, engineers, and scientists determine the maximum water vapor pressure at a given temperature.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ e_s = 6.112 \times \exp\left(\frac{17.67 \times T}{T + 243.5}\right) \]

Where:

\( e_s \) — Saturation vapor pressure (hPa)
\( T \) — Temperature (°C)

Explanation: The formula approximates the relationship between temperature and the maximum water vapor pressure in the atmosphere.

3. Importance of Vapor Pressure Calculation

Details: Vapor pressure is crucial for weather forecasting, humidity calculations, and understanding evaporation processes.

4. Using the Calculator

Tips: Enter the temperature in Celsius. The calculator works best for temperatures between -40°C and 50°C.

5. Frequently Asked Questions (FAQ)

Q1: What is the August-Roche-Magnus formula?
A: It's an empirical approximation for the saturation vapor pressure of water in air as a function of temperature.

Q2: Why is vapor pressure important?
A: It helps determine humidity levels, predict dew formation, and understand atmospheric processes.

Q3: What units does this calculator use?
A: Temperature in Celsius (°C) and vapor pressure in hectopascals (hPa).

Q4: How accurate is this formula?
A: It's accurate to within 0.1% for temperatures between -30°C and 35°C.

Q5: Can I use this for other liquids?
A: No, this formula is specifically for water vapor in air.