Articles | Volume 11, issue 12
https://doi.org/10.5194/gmd-11-5051-2018
https://doi.org/10.5194/gmd-11-5051-2018
Development and technical paper
 | 
11 Dec 2018
Development and technical paper |  | 11 Dec 2018

Evaluation of iterative Kalman smoother schemes for multi-decadal past climate analysis with comprehensive Earth system models

Javier García-Pintado and André Paul

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Short summary
Earth system models (ESMs) integrate interactions of atmosphere, ocean, land, ice, and biosphere to estimate the state of regional and global climate under a variety of conditions. Past climate field reconstructions with deterministic ESMs through the assimilation of climate proxies need to consider the required high computations and model non-linearity. Our tests indicate that iterative schemes based on the Kalman filter and careful sensitivity analysis are adequate for approaching the problem.