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The 2001 Great Dust Storms 7
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The 2001 Great Dust Storms 7

October 20, 2009
Throughout July and August, MOC observations revealed a general pattern of regional storm centers beneath an ever-spreading veil of stratospheric dust. The Daedalia/Claritas/Syria storm created dust plumes on over 90 consecutive days (see figure, below).

Previous views and perceptions of global dust events had noted regional brightenings within the overall pall of what was called a "global dust storm." From our new observations, we know that at least this global dust "storm" was really a set of storms, somehow triggered to occur at the same time. We also know that dust was not raised from everywhere on the surface during this global event, but rather from discrete, long-lived centers of activity. We saw, for the first time, rapid, cross-equatorial flow of dust-raising winds.


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