Articles | Volume 11, issue 10
Geosci. Model Dev., 11, 4011–4019, 2018
https://doi.org/10.5194/gmd-11-4011-2018
Geosci. Model Dev., 11, 4011–4019, 2018
https://doi.org/10.5194/gmd-11-4011-2018

Methods for assessment of models 05 Oct 2018

Methods for assessment of models | 05 Oct 2018

Data assimilation cycle length and observation impact in mesoscale ocean forecasting

Paul Sandery

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Latest update: 31 Jul 2021
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Short summary
This article compares global mesoscale ocean forecasts with different data assimilation cycle lengths. Mean absolute increment is used to quantify differences in the overall impact of observations. Greater observation impact does not necessarily improve a forecast system. Experiments show a 1-day cycle generates improved 7-day forecasts when compared to a 3-day cycle. Cycle length is an important choice that influences system bias and predictability.