1. What is the Standard Temperature Lapse Rate?

The standard temperature lapse rate for water is the rate at which atmospheric temperature decreases with increasing altitude in a water-saturated environment. The standard value is 6.5°C per kilometer.

2. How Does the Calculator Work?

The calculator uses the standard lapse rate equation:

Where:

• Base Temperature — Starting temperature at reference altitude (°C)
• Altitude Difference — Height difference from reference point (km)
• 6.5 — Standard lapse rate for water (°C/km)

3. Importance of Lapse Rate Calculation

Details: Understanding temperature changes with altitude is crucial for meteorology, aviation, environmental studies, and atmospheric research.

4. Using the Calculator

Tips: Enter the base temperature in °C and altitude difference in kilometers. The calculator will determine the expected temperature at the new altitude.

5. Frequently Asked Questions (FAQ)

Q1: Why is the lapse rate different for water vs. dry air?
A: The presence of water vapor affects the adiabatic process, resulting in a different rate of temperature change with altitude.

Q2: Is 6.5°C/km always accurate?
A: This is a standard average value. Actual conditions may vary due to weather patterns, humidity, and other atmospheric factors.

Q3: How does this differ from the dry adiabatic lapse rate?
A: The dry adiabatic lapse rate is typically 9.8°C/km, significantly steeper than the moist (water) lapse rate.

Q4: What altitude range is this valid for?
A: This is most accurate in the troposphere, up to about 11 km altitude.

Q5: Can this be used for calculating cloud formation?
A: Yes, the moist adiabatic lapse rate is important for determining cloud base height and atmospheric stability.