ECMWF's next ensemble reanalysis system for ocean and sea ice: ORAS6
Le prochain système de réanalyse d'ensemble du CEPMMT pour l'océan et la glace de mer : ORAS6
Zuo, Hao ; Alonso Balmaseda, Magdalena ; Boisséson, Eric de ; Browne, Philip ; Chrust, Marcin ; Keeley, Sarah ; Mogensen, Kristian ; Pelletier, Charles ; Rosnay, Patricia de ; Takakura, Toshinari
ECMWF has a long history of development and production of ocean and sea-ice reanalysis. Initially conceived to provide initial conditions for seasonal re-forecasts, the user base of the ECMWF ocean and sea-ice reanalysis has increased over the years. This reanalysis supports climate monitoring, the initialisation of extended-range and decadal forecasts, and more recently the initialisation of medium-range forecasts. The 5th generation of ECMWF's ocean and sea-ice reanalysis system, ORAS5, went operational in 2016. It serves as the basis of OCEAN5, which has been providing ocean and sea-ice initial conditions for all ECMWF coupled forecasting systems ever since (Zuo et al., 2019). ORAS6 - the 6th generation of ocean and sea-ice ensemble reanalysis - will have an important addition: the provision of surface boundary conditions for the upcoming atmospheric reanalysis ERA6.</p>
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