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4.a. Feature of dust mixing (1)
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Figure 10a:
Time development of spatial distributions of dust mixing ratio (upper panel,
kg/kg) and vertical wind (lower panel) from LT = 11:39 to 18:00
every 10 minutes during the dust injection occurs.
The areas where the value of dust mixing ratio is larger than
1.0×10-8 kg/kg are coloerd in the
upper panel.
The conter interval is 5 msec-1 for wind
velocity.
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Figure 10a shows the distributions of dust mixing
ratio (kg/kg) and vertical wind during the dust injection occurs.
The value of dust mixing ratio is relatively large in the areas where
the ascending convective plumes exist.
Dust spreads to whole convection layer after 2 hours from the
time when the dust injection started (at LT=14:00).
The distribution of dust below about 10 km hight is almost uniform
horizontally and vertically at LT=17:00.
Horizontal contrast of radiative heating due to that of dust
distribution between updraft region and the other seems to have no
effect on the convection during dust injection occurs.
The aspect ratio of convective cell is about 2 to 1 and the width of
updraft region is almost equal to that of downdraft
(Figure 10a (lower panel))
These are similar to those of dust-free case (Figure 4 (upper right)).
The results suggest that dust spreads to whole convection layer before
the radiative heat contrast associated with dust affects on the
convection.
Dust can be considered as a passive tracer during dust injection occurs.
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