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Convergence is an atmospheric condition that exists when there is a horizontal net inflow of air into a region. When air converges along the earth's surface, it is forced to rise since it cannot go downward.
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Large scale convergence can lift a layer of air hundreds of kilometers across. |
Photograph by: Rauber |
Vertical motions associated with convergence are typically much weaker than the small-scale vertical motions associated with convective processes. As a result, clouds generated through convergence, for example cirrostratus clouds, are typically less vertically developed than convective clouds. |
convection |
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topography |