American Meteorological Society Certification Thermodynamics and Atmospheric Stability

Question 1

What does the dry adiabatic lapse rate (DALR) represent?

Accepted Answer

Rate at which unsaturated air cools as it rises (≈9.8°C/km)

Answer

Rate of temperature decrease in the stratosphere

Answer

Rate of surface warming at noon

Answer

Temperature gradient across a front

Question 2

What is the Lifted Index (LI) used to assess?

Accepted Answer

Atmospheric stability and convective potential

Answer

Upper-level wind speed

Answer

Soil moisture availability

Answer

Fog formation likelihood

Question 3

What is the Level of Free Convection (LFC)?

Accepted Answer

The level where a lifted parcel becomes warmer than the environment and rises freely

Answer

The height where winds become geostrophic

Answer

The base of the stratocumulus layer

Answer

The level where wind shear maximizes

Question 4

CAPE (Convective Available Potential Energy) is measured in which units?

Accepted Answer

Joules per kilogram (J/kg)

Answer

Meters per second

Answer

Pascals

Answer

Kelvin

Question 5

A temperature inversion in the lower atmosphere refers to what condition?

Accepted Answer

Temperature increasing with height rather than decreasing

Answer

Temperature decreasing with height at an abnormally fast rate

Answer

Temperature remaining constant with height

Answer

Rapid temperature fluctuations at the surface

Question 6

Equivalent potential temperature (theta-e) is conserved in which atmospheric process?

Accepted Answer

Both dry and moist (saturated) adiabatic processes

Answer

Dry adiabatic ascent only

Answer

Diabatic heating

Answer

Radiative cooling