Geoscience Reference
In-Depth Information
Tabl e 2. 1
(continued)
Size range,
m
Median
aspect ratio
a
Length-to-height
ratio
Median
shape factor
b
Number of
analyzed particles
Location
Reference
1.38
d
Ground-based, arid
locations, western and
central China
0.2-0.4
3.4-4.0
1.33-1.37
5,000 (estimate)
Okada et al. (
2001
)
1.38-1.42
d
0.4-1
5.9-7.1
1.52-1.54
1.41-1.43
d
1-2
5.9-7.1
1.71-1.84
1.27-1.41
d
2-4
5.0-7.7
2.05-2.07
1.34
d
Ground-based, eastern
China
0.2-0.4
2.5
1.32
2,000 (estimate)
Okada et al. (
2001
)
1.37
d
0.4-1
2.9
1.48
1.36
d
1-2
2.5
1.53
1.37
d
2-4
4.2
1.70
Ground-based, dust
component in central
China
>1 (estimate)
1.55
1,000 (estimate)
Gao and Anderson (
2001
)
Ground-based, dust in
eastern coastal China
>1 (estimate)
1.06
1,500 (estimate)
Gao and Anderson (
2001
)
1.22-1.30
d
Insoluble Asian and
African dust in snow
deposition, Japan
2.5-15
1.08-1.16
11,000
Li and Osada (
2007b
)
Ship-borne, Asian dust,
western North Pacific
0.4-5
1.12-1.24
11,000
Gao et al. (
2007
)
a
Aspect ratio: ratio of four times the squared particle's longest projection to pi times the projected area
b
Shape factor: ratio of squared particle's perimeter to four pi times the projected area
c
0.63 is reported as ratio of particle height to projected area diameter
d
Lower values due to different definition of aspect ratio
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