Ocean data assimilation is increasingly recognized as crucial for the accuracy of real-time
ocean prediction systems and historical re-analyses. The current status of ocean data …

The Last Millennium Reanalysis (LMR) utilizes an ensemble methodology to assimilate
paleoclimate data for the production of annually resolved climate field reconstructions of the …

BRAN2020 (2020 version of the Bluelink ReANalysis) is an ocean reanalysis that combines
observations with an eddy-resolving, near-global ocean general circulation model to …

Bluelink is Australia's contribution to the Global Ocean Data Assimilation Experiment
(GODAE). The goals of GODAE include the development and application of eddy-resolving …

The use of perturbed observations in the traditional ensemble Kalman filter (EnKF) results in
a suboptimal filter behaviour, particularly for small ensembles. In this work, we propose a …

Ensemble Kalman filters use the sample covariance of an observation and a model state
variable to update a prior estimate of the state variable. The sample covariance can be …

This study investigates the relation between two common localisation methods in ensemble
Kalman filter (EnKF) systems: covariance localisation and local analysis. Both methods are …

The generation and evolution of eddies in the ocean are largely due to instabilities that are
unpredictable, even on short time-scales. As a result, eddy-resolving ocean reanalyses …

In alpine and high‐latitude regions, water resource decision making often requires large‐
scale estimates of snow amounts and melt rates. Such estimates are available through …

We report a calculation of time‐dependent quasi‐geostrophic core flows for 1940–2010.
Inverting recursively for an ensemble of solutions, we evaluate the main source of …