[PDF][PDF] 26 sea surface temperature and sea ice concentration for ERA5
S Hirahara, MA Balmaseda, ED Boisseson… - Eur. Centre Medium …, 2016 - ecmwf.int
Eur. Centre Medium Range Weather Forecasts, Berkshire, UK, ERA Rep. Ser, 2016•ecmwf.int
This report explores ways to describe Sea Surface Temperature (SST) and Sea Ice
Concentration (SIC) suitable for next generation reanalyses at ECMWF. To make a long-
term time series, we first evaluate two high-resolution SST/SIC products: HadISST2 and
OSTIA. HadISST2 is considered for the historical period, while OSTIA would support the
near-real-time reanalysis. The two products reveal a broad agreement in the global mean
SST, suggesting that the combined time series should be consistent over time. Differences …
Concentration (SIC) suitable for next generation reanalyses at ECMWF. To make a long-
term time series, we first evaluate two high-resolution SST/SIC products: HadISST2 and
OSTIA. HadISST2 is considered for the historical period, while OSTIA would support the
near-real-time reanalysis. The two products reveal a broad agreement in the global mean
SST, suggesting that the combined time series should be consistent over time. Differences …
Abstract
This report explores ways to describe Sea Surface Temperature (SST) and Sea Ice Concentration (SIC) suitable for next generation reanalyses at ECMWF. To make a long-term time series, we first evaluate two high-resolution SST/SIC products: HadISST2 and OSTIA. HadISST2 is considered for the historical period, while OSTIA would support the near-real-time reanalysis.
The two products reveal a broad agreement in the global mean SST, suggesting that the combined time series should be consistent over time. Differences are mainly found in small scale variabilities, where OSTIA better resolves the tropical instability waves and sub-mesoscale eddies in the midlatitudes. The high-resolution features allow OSTIA for a better fit to scatterometer surface wind observations in the 4D-Var data assimilation (DA), improving forecast scores for up to 3 days.
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