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Advection

The predominantly horizontal transport of an atmospheric property by the wind, e.g. moisture[?] or heat advection. Mathematically it is the operator (in z and p vertical coordinates)

<math>\mathbf{v} \cdot \nabla = u \frac{\partial}{\partial x} + v \frac{\partial}{\partial y} + w \frac{\partial}{\partial z} = u \frac{\partial}{\partial x} + v \frac{\partial}{\partial y} + \omega \frac{\partial}{\partial p}</math>.



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Celtic languages

... form the Italo-Celtic branch. Celtic is split into two branches: Continental -- Celtiberian[?], Galatian[?], Noric[?], Gaulish, Leptonic[?], and perhaps including ...