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Improve order of definition and use of terms
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documentation/docs/pages/season2.md

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@@ -1031,11 +1031,10 @@ Date: 18/06/2026.
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Presenter: Angus Gibson (@angus-g).
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With **generalised vertical coordinates**, we know that vertical velocities permit
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With **generalised vertical coordinates (GVC)**, we know that vertical velocities permit
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a range of grid evolution from fully Lagrangian (zero dia-surface transport) to fully
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Eulerian (zero grid velocity). For the *vertical Lagrangian-remap* method, we tend
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toward the fully Lagrangian side: the GVC $s$ follows fluid elements so that the
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dia-surface volume flux $w^{(\dot{s})} = 0$.
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Eulerian (zero grid velocity). In MOM6, the dynamics are written in the fully Lagrangian sense:
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the GVC $s$ follows fluid elements so that the dia-surface volume flux $w^{(\dot{s})} = 0$.
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If the model is using a purely Lagrangian coordinate, how do we have any control
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over it? In general, these coordinates drift to a less useful representation of the
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that must be captured somehow.
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The method has three steps:
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1. the Vertical Lagrangian step: evolve the model as above;
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1. the Vertical Lagrangian step: evolve the model with a purely Lagrangian
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generalised coordinate;
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2. the Vertical Regrid step: explicitly set the generalised coordinate;
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3. the Vertical Remap step: ensure consistency between the ocean state
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and the new coordinate.
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![Vertical Lagrangian remapping](../assets/vertical-lagrange-remap.png)
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There are two big advantages to using this method:
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1. There is no vertical CFL limit! As long as the remapping can handle
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interpolation over more than a single cell, the target grid can be
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arbitrary.

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