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An assessment of ten ocean reanalyses in the polar regions

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Uotila, Petteri Goosse, Hugues [UCL] Haines, Keith Chevallier, Matthieu Barthélemy, Antoine Massonnet, François [UCL] Zhang, Zhaoru

Global and regional ocean and sea ice reanalysis products (ORAs) are increasingly used in polar research, but their quality remains to be systematically assessed. To address this, the Polar ORA Intercomparison Project (Polar ORA-IP) has been established following on from the ORA-IP project. Several aspects of ten selected ORAs in the Arctic and Antarctic were addressed by concentrating on comparing their mean states in terms of snow, sea ice, ocean transports and hydrography. Most polar diagnostics were carried out for the first time in such an extensive set of ORAs. For the multi-ORA mean state, we found that deviations from observations were typically smaller than individual ORA anomalies, often attributed to off-setting biases of individual ORAs. The ORA ensemble mean therefore appears to be a useful product and while knowing its main deficiencies and recognising its restrictions, it can be used to gain useful information on the physical state of the polar marine environment.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2019
Language Anglais
Journal information "Climate Dynamics" - Vol. 52, no. 4-5, p. 1613–1650 (2019)
Peer reviewed yes
Publisher Springer Nature
issn 0930-7575
e-issn 1432-0894
Publication status Publié
Affiliation UCL - SST/ELI/ELIC - Earth & Climate
Links
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Bibliographic reference Uotila, Petteri ; Goosse, Hugues ; Haines, Keith ; Chevallier, Matthieu ; Barthélemy, Antoine ; et. al. An assessment of ten ocean reanalyses in the polar regions. In: Climate Dynamics, Vol. 52, no. 4-5, p. 1613–1650 (2019)
Permanent URL http://hdl.handle.net/2078.1/198468