With reference to the Plume behavior, which of the following statements is correct for Fanning?
- AIt is a type of plume which has a wavy character
- BIt is a type of plume which is shaped like a cone
- CIt is type of plume emitted under extreme inversion conditionsCorrect
- DIt is a condition where the plume is caught between inversions.
Solution
Concept
Plume types
Step-by-step solution
1. Fanning: emitted under strong inversion (very stable); the plume spreads horizontally like a fan. 2. Looping is wavy; coning is cone-shaped; trapping is between inversions.
Explanation
Extreme stability suppresses vertical mixing.
Why the other options are wrong
A, B and D describe looping, coning and trapping.
Shortcut
Fanning = strong inversion.
Correct answer: C) It is type of plume emitted under extreme inversion conditions