1. What is Saturation Vapor Pressure?

Saturation vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature. It represents the maximum amount of water vapor that air can hold at a specific temperature.

2. How Does the Calculator Work?

The calculator uses the saturation vapor pressure formula:

Where:

• \( T \) — Temperature in degrees Celsius (°C)
• 6.11 — Constant representing saturation vapor pressure at 0°C in hPa
• 7.5 and 237.3 — Empirical constants for water vapor

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

3. Importance of Saturation Vapor Pressure

Details: Saturation vapor pressure is crucial for understanding humidity, cloud formation, precipitation processes, and various meteorological phenomena. It's fundamental in weather forecasting and climate studies.

4. Using the Calculator

Tips: Enter temperature in degrees Celsius. The calculator will compute the saturation vapor pressure in hectopascals (hPa).

5. Frequently Asked Questions (FAQ)

Q1: What units are used for saturation vapor pressure?
A: Typically measured in hectopascals (hPa) or millibars (mb), which are equivalent units of pressure.

Q2: How does temperature affect saturation vapor pressure?
A: Saturation vapor pressure increases exponentially with temperature. Warmer air can hold significantly more water vapor than colder air.

Q3: What is the relationship between saturation vapor pressure and relative humidity?
A: Relative humidity = (actual vapor pressure / saturation vapor pressure) × 100%. It indicates how close the air is to being saturated.

Q4: Why is 6.11 used in the formula?
A: 6.11 hPa is the saturation vapor pressure of water at 0°C, serving as the baseline constant in this empirical formula.

Q5: Are there different formulas for saturation vapor pressure?
A: Yes, several empirical formulas exist (e.g., Magnus formula, Goff-Gratch equation), each with slightly different constants and accuracy across temperature ranges.