2D variational ambiguity removal method

3D variational assimilation

3-dimensional variational assimilation

a system of generalized set-valued variational inc

adiabatic variational approximation

Adjoint variational method

adjoint variational principle

canonical variational transition state the- my

Data variational assimilation

discrete variational method

discrete variational principle

discrete variational Xa method

displacement-based variational method

energy variational method

energy variational principle

Four dimensional variational data assimilation

Four-dimensional variational assimilation

four-dimensional variational assimilation wind retrieval

Four-dimensional variational data assimilation

generalized HR variational principle