Variational methods of data assimilation in the problem of stochastic modelling of complexes of hydrometeorological fields

A new method of dynamic probabilistic numerical modelling of ensembles of independent realizations of complexes of space-time fields of hydrometeorological elements based on the variational principle is proposed. An ensemble of realizations satisfies statistical climatic characteristics in the atmosphere, and each realization of this ensemble satisfies the hydrothermodynamic numerical model.