1. What is Moist Lapse Rate?

The moist adiabatic lapse rate is the rate at which saturated air cools as it rises. It's typically about 5°C per kilometer, though this can vary slightly with temperature and pressure.

2. How Does the Calculator Work?

The calculator uses the standard moist lapse rate:

Where:

• Base Temperature — Starting temperature at ground level (°C)
• Height Difference — Vertical distance from base (km)
• 5 — Standard moist lapse rate (°C/km)

Explanation: As moist air rises, it cools at approximately 5°C per kilometer due to expansion and latent heat release from condensation.

3. Importance of Lapse Rate Calculation

Details: Understanding lapse rates is crucial for meteorology, aviation, and climate studies. It helps predict cloud formation, precipitation, and atmospheric stability.

4. Using the Calculator

Tips: Enter the base temperature in °C and height difference in kilometers. The calculator will estimate the temperature at the specified height.

5. Frequently Asked Questions (FAQ)

Q1: How does moist lapse rate differ from dry lapse rate?
A: Dry lapse rate is about 9.8°C/km, while moist is about 5°C/km due to latent heat release from condensation.

Q2: Why is moist lapse rate important for weather forecasting?
A: It helps determine cloud base height, predict thunderstorm development, and understand atmospheric stability.

Q3: Does the moist lapse rate vary?
A: Yes, it can range from about 4-9°C/km depending on temperature and pressure, but 5°C/km is a good average.

Q4: When is the moist lapse rate applicable?
A: When air is saturated (relative humidity = 100%) and rising, typically in cloud formation.

Q5: How does this relate to environmental lapse rate?
A: Comparing environmental lapse rate to these adiabatic rates determines atmospheric stability.