Discussion
Arrange the aerosol size modes in order of increasing particle size.
1. accumulation mode
2. nucleation mode
3. coarse mode
4. Aitken mode
Answer: A
The sequence runs from freshly nucleated clusters through to mechanically generated dust and sea salt. Particles move up through the smaller modes by coagulation and condensational growth over time. The coarse mode is generated mechanically rather than reached by growth.
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