Articles | Volume 26, issue 3
Nonlin. Processes Geophys., 26, 325–338, 2019
https://doi.org/10.5194/npg-26-325-2019
Nonlin. Processes Geophys., 26, 325–338, 2019
https://doi.org/10.5194/npg-26-325-2019

Research article 17 Sep 2019

Research article | 17 Sep 2019

Revising the stochastic iterative ensemble smoother

Patrick Nima Raanes et al.

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Short summary
A popular variational ensemble smoother for data assimilation and history matching is simplified. An exact relationship between ensemble linearizations (linear regression) and adjoints (analytic derivatives) is established.