10,000 FEET

30,00050,000
FEET

TROPOSPHERE

40,00060,000
FEET

TROPOPAUSE ————- A

STRATOSPHERE

GROUND

GENERALIZED CONCEPTS:

.

i

STEM

-

25

MEAN OF
PARTICLE
SIZES

“om

awe

PERCENTAGE
of
TOTAL

DISTRIBUTION OF ACTIVITY

DIMENSIONS OF CLOUD AND STEM

Figure 1

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